Cryptotendipes parallelus Yan, Tang & Wang, 2005, sp. n.

Cryptotendipes parallelus sp. n. (Fig. 4 A–C) Material examined: Holotype male, CHINA: Shandong Province: Zaozhuang City, Beizhuang, 28.V. 1994, X. Wang (BDN no. 03337). Etymology: The species name is from Latin parallelus, parallel, referring to the parallel­sided anal point. Diagnostic characters: The species is similar to C. emorsus (Townes, 1945), but differs in having a lower antennal ratio (1.71 as opposed to 2.40) and a lower LR 1 (1.82 as opposed to 2.40), microtrichia on superior volsella, parallel­sided anal point, and apically pointed gonostylus. Male imago (n = 1) Total length 2.86 mm. Wing length 1.43 mm. Total length/wing length 2.00. Wing length/length of profemur 2.47. Coloration: Thorax yellowish brown, scutellum and dorsum of scutum pale yellow. Abdomen yellowish green. Femora and tibiae of front legs brown at apex, tarsi of fore legs yellowish green, mid and hind legs entirely yellowish green. Head: AR 1.71. Ultimate flagellomere 530 µm long. Frontal tubercles weakly developed, 3 µm in diameter. Temporal 10 setae, including 2 outer verticals and 8 postorbitals. Clypeus with 8 setae. Tentorium 135 µm long, 25 µm wide. Palpomere lengths (in µm): 38, 38, 85, 115, 163. Palp segments 5 th/ 3 rd 1.92. Thorax: Antepronotals with 3 setae, acrostichals 1, dorsocentrals 5, prealars 2. Scutellum with 6 setae. Wing (Fig. 4 A): VR 1.25, R and R 1 bare, R 4 + 5 with 2 setae at apex. Brachiolum with 2 setae. Squama with 2 setae. Anal lobe weakly developed. Legs: Front tibia with 2 subapical setae, 82 µm and 83 µm long, spurs of middle tibia 15 µm and 17 µm long, comb with 14 teeth, 10 µm long; spurs of hind tibia 23 µm and 25 µm long, comb with 20 teeth, 10 µm long. Tarsus 1 of mid legs with 3 sensilla chaetica in distal 1 / 3. Lengths (in µm) and proportions of legs as in Table 4. Hypopygium (Fig. 4 B, C): Anal point 45 µm long, slender, 6 µm wide at base, 5 µm wide at apex, parallel sided, rounded at apex, without lateral setae. Tergite IX with 13 setae at base of anal point, and with 4 setae on ventral tergite IX. Laterosternite IX with 2 setae. Anal tergite without obvious bands. Phallapodeme 50 µm long. Transverse sternapodeme 28 µm long. Superior volsella rod­like, with 3 long apical setae and microtrichia. Gonocoxite 93 µm long and inner margins forming sharp angle in middle. Gonostylus 135 µm long, widest at about 1 / 3 from base, inner margin concave in middle and bearing 11 setae on inner margin. HR 0.69; HV 2.12. Distribution: The new species occurs in Palaearctic China (Shandong Province).Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, pp. 1-24 in Zootaxa 1086 on pages 9-10, DOI: 10.5281/zenodo.17048

Demicryptochironomus (Irmakia) neglectus Reiss 1988

Demicryptochironomus (Irmakia) neglectus Reiss 1988 (Figs. 8 A–C) Demicryptochironomus (Irmakia) neglectus Reiss 1988: 7; Zorina 2004: 234 Material examined: 1 male: Xinjiang Autonomous Region, Haba River, Baihualin Natural Conservation. 15. VII. 2002, sweep net, H. Tang. (BDN no. 21802). Diagnostic characters: The species can be distinguished from other species by having Y­shaped anal tergite bands, a slim conical anal point with a basal crest, and a gonostylus with the inner margin strongly concave in the middle. In the Chinese specimen, the anal tergite bands are Y­shaped, but not joined in the middle. Male imago (n = 1) Total length 3.13 mm. Wing length 1.68 mm. Total length/wing length 1.86. Wing length/ length of profemur 2.21. Coloration: Thorax brown. Abdomen with tergites I–V yellowish brown and tergites VI–VIII brown, hypopygium dark brown. Apex of femora, tibia, and tarsi of fore legs brown, the rest yellowish green. Femora and tibiae of mid and hind legs yellowish green, tibia dark brown towards tarsus IV. Head: AR 1.81, Ultimate flagellomere 580 µm long. Frontal tubercles small, rounded, 3 µm in diameter. Temporal 9 setae, including 3 inner verticals, 6 outer verticals. Clypeus with 7 setae. Tentorium 118 µm long, 23 µm wide. Palpomere lengths (in µm): 28, 38, 142, 145, 205. Thorax: Antepronotals 2, dorsocentrals 8, acrostichals 5, prealars 4. Scutellum with 12 setae. Wing (Fig. 8 A): VR 1.10, R with 13 setae, R 1 with 12 setae, R 4 + 5 with 10 setae. Brachiolum with 2 setae. Squama with 6 setae. Anal lobe well developed. Legs: Spur of middle tibia 15 µm; 20 µm long, comb with 30 teeth, 8–10 µm long; Spur of hind tibia 20 µm; 26 µm long, comb with 40 teeth, 8–10 µm long. Tarsus 1 of mid legs with sensilla chaetica 1. Lengths (in µm) and proportions of legs: Hypopygium (Figs. 8 B, C): Anal tergite bands Y­shaped, but not medially joined. Anal point 87 µm long, 18 µm wide at base, 10 µm wide at apex, slim conical, bluntly rounded distally, basally with crest. Tergite IX with 12 setae. Laterosternite IX with 7 setae. Phallapodeme 80 µm long. Transverse sternapodeme 35 µm long. Superior volsella cylindrical, nearly straight, with 2 apical setae. Gonocoxite 83 µm long, inner margins forming blunt median angle, with 3 setae. Gonostylus 208 µm long. Distal part of gonostylus nearly parallel sided, strongly curved, apically rounded. HR 0.40; HV 1.50. Distribution: The species has a distribution in the Palaearctic region. This record is the first for China.Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, Demicryptochironomus Lenz from China (Diptera: Chironomidae), pp. 1-31 in Zootaxa 910 on pages 20-22, DOI: 10.5281/zenodo.17100

Demicryptochironomus (Demicryptochironomus) yui Yan, Tang & Wang, 2005, sp. n.

Demicryptochironomus (Demicryptochironomus) yui sp. n. (Figs. 5 A–E) Type material: Holotype male, CHINA, Guizhou Province, Daozhen County, Dashahe Natural Conservation. 1300m. 24. VIII. 2004, X. Yu (BDN no. 21864). Etymology: Named in honour of Mr. X. Yu who collected the type material. Diagnostic characters: This species closely resembles D. (D.) minus sp. n. in the coloration of the abdomen and the shape of the hypopygium and anal point, but it can be separated by having a green thorax with brown spots, tibia and tarsi of the fore legs blackish brown, the long superior volsella divided only at the apex, and the absence of an inferior volsella. Male imago (n = 1) Total length 3.85 mm. Wing length 2.05 mm. Total length/wing length 1.88. Wing length/ length of profemur 2.16. Coloration: Thorax green, with dark brown vittae, and 2 / 3 of preepisternum, median anepisternum, and anterior 1 / 2 of postnotum dark brown. Front femora light brown, tibia and tarsi blackish brown. Femora of mid and hind legs yellowish green, tibiae light brown, tarsi dark brown towards tarsus 5. Abdomen (Fig. 5 B) yellowish green, with posterior 1 / 4 of tergites II–VI with dark brown spots; tergite IX and hypopygium dark brown, remainder of tergites lighter yellowish green. Head: AR 1.93, Ultimate flagellomere 770 m long. Frontal tubercles cylindrical, 8 m long, 5 m wide. Temporal 16 setae, including 5 inner verticals, 7 outer verticals, and 4 postorbitals. Clypeus with 14 setae. Tentorium 130 µm long, 35 µm wide. Palpomere lengths (in µm): 42, 70, 198, 158, 225. Thorax: Antepronotals 3, dorsocentrals 10, acrostichals 7, prealars 5. Scutellum with 16 setae. Wing (Fig. 5 A): VR 1.16, R with 15 setae, R 1 with 14 setae, R 4 + 5 with 4 setae. Brachiolum with 2 setae. Squama with 8 setae. Anal lobe well developed. Legs: Front tibia with 1 subapical seta, 115 µm long; spur of middle tibia 23 µm; 25 µm long, comb with 38 teeth, 10–12 µm long; spur of hind tibia 25 µm; 30 µm long, comb with 48 teeth, 10–12 µm long. Sensilla chaetica absent. Lengths (in µm) and proportions of legs: Hypopygium (Figs. 5 C–E): Anal point 75 µm long slightly widened medially, with ridges at base extending to tergite IX and with short lateral setae. Anal point apically rounded. Tergite IX with 18 setae. Laterosternite IX with 3 setae. Anal tergite bands slightly V­shaped. Phallapodeme 60 µm long. Transverse sternapodeme 46 µm long. Superior volsella (Fig. 5 C) digitiform, apically divided, with 2 long apical setae and 1 median lateral seta. Gonocoxite 125 µm long, inner margins forming median angle. Gonostylus 177 µm long, widest at about basal 1 / 3, rounded apically, without distinct longitudinal keel, inner margin nearly straight. HR 0.71, HV 2.18. Distribution: This species was collected in a subtropical mountain area in Guizhou Province (Oriental Region).Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, Demicryptochironomus Lenz from China (Diptera: Chironomidae), pp. 1-31 in Zootaxa 910 on pages 14-16, DOI: 10.5281/zenodo.17100

Cryptotendipes

<i>Cryptotendipes</i> sp. 1 (Fig. 5 A–F) <p> <b>Material examined:</b> 1 larva. CHINA, Liaoning Province, Benxi City, Hunjiang Reservoir, X.1986, leg. J. Wang.</p> <p> <b>Fourth­instar larva</b>.</p> <p>Total length 3.92 mm, head capsule in several parts, lengths and widths estimated at about 300 µm long, 260 µm wide, cephalic index 0.86.</p> <p> <b>Coloration</b> (Fig.5 A): Head yellowish brown. Mentum and posterior occipital area dark brown. Gula pale brown.</p> <p> <b>Antenna</b> (Fig. 5 B): Total length 50 µm long, 0.16 times length of head capsule, 0.5 times of mandible. Flagellomere lengths as: 25; 7.5; 2; 4; 4. AR = 1.00–1.04. Basal segment relatively short, 15 µm wide. Antennal blade 17.5 µm long, reaching middle of 4th segment, accessory blade 14 µm long, extending base of 4th segment. Ring organ located near middle, 12–13 µm long from base. Style on apex of second segment, 4 µm long, extending to third segment. Lauterborn organ absent.</p> <p> <b>Labrum</b> (Fig. 5 C): SI and SII both slender, SII 30 µm long, SI 20 µm long. SIII simple; SIVA consists of 2 segments, basal segment 10 µm long, distal segment 5 µm long. Chaetulae laterales 5 pairs of simple setae. Pecten epipharyngis transparent, not distinct, apparently 3 blunt teeth with common base. Basal sclerite rounded. Premandible with 2 pointed apical teeth, outer tooth very slender, and 1 blunt basal tooth slightly concave in middle. Premandible brush present. Labral sclerites too indistinct to interpret.</p> <p> <b>Mandible</b> (Fig. 5 D): Total length 100 µm long. Distally pale brown, basally pale. With 2 inner teeth and 1 apical tooth, third false teeth present on mola. Apical tooth 12.5 µm long, about as long as combined width of 2 inner teeth. Apex of mandible teeth flat, lining up with inner margin of apical tooth. Seta subdentalis blade­like, relatively long, 35 µm, extending to base of apical tooth. Seta interna with 4 branches, first, second and fourth branches simple; distal part of third branch split into 3 or 4 small setae, basal branch longest, other branches subequal in length.</p> <p> <b>Maxilla</b>. (Fig. 5 E): Basal segment of maxillary palp slightly longer than wide, with ring organ located near middle. Distal part with 4 or 5 blade­like setae.</p> <p> <b>Mentum</b> (Fig. 5 F): Total width 95 µm. Median tooth trifid, 25 µm wide. Lateral notch not deep. Ventromental plate 75 µm wide (w), 35 µm long (l). Separation (s) between plates 52 µm. VmPR (w/l): 2.14; VmPSR (w/s): 1.44; Mentum ratio (VmP/M): 0.79. Outer margin of ventromental plate rugose. Striae number 18–20. Setae submenti simple, distance between setae 58 µm. Postmentum 118 µm long.</p> <p> <b>Abdomen</b>: Posterior parapods 170 µm long, 90 µm wide, with 16 yellow simple claws. Anal tubules 2 pairs, dorsal pair 64 µm long and 30 µm wide; ventral pair slightly larger, 70 µm long and 45 µm wide. Procercus with 6 anal seta, 460–480 µm long. Supraanal seta 225 µm long.</p> <p> <b>Remarks</b>: Larvae were collected from the sublittoral zone of a reservoir. They are small with a relatively short basal antennal segment and low antennal ratio and rather shallow lateral notch on the trifid median mental tooth. The mandible resembles somewhat that of <i>Cryptotendipes pseudotener</i>, with two flat inner teeth and a long seta subdentalis that almost reaches the apex of the apical tooth. Of all the described freshwater larvae in this genus, only <i>C. usmaensis, C. emorsus</i>, and <i>C. pseudotender</i> have flat mandibular inner teeth. <i>Cryptotendipes usmaensis</i> and <i>C. emorsus</i> can be separated from our material by the short seta subdentalis reaching no farther than to the second inner tooth, whereas in our material, the seta subdentalis clearly extends to the base of the apical tooth. <i>Cryptotendipes pseudotener</i> can be separated from the larvae of other species, which have a single, broad median mental tooth; our specimens clearly have trifid median teeth. The larva can not be associated with any of the adults described in this paper. We, therefore, treat this larva as <i>C.</i> sp. 1.</p>Published as part of <i>Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, pp. 1-24 in Zootaxa 1086</i> on pages 11-12, DOI: <a href="http://zenodo.org/record/170487">10.5281/zenodo.170487</a&gt

Cryptotendipes

Cryptotendipes sp. 3 (Fig. 7 A–F) Larva (only head capsule retained) Material examined: 1 larva. China: Hebei Province, Chengde City, Kuancheng County, 21.IX. 2001, leg. X. Wang. Fourth­instar larva. Coloration: Head capsule pale yellow with some teeth brown. Gula deep brown. Posterior occipital margin dark brown. Antenna (Fig. 7 A): Total length 55 µm long, 0.55 times as long as mandible. Antennal segment lengths (in µm): 30; 10; 2.5; 4; 2.5. AR = 1.2. Basal segment 12.5 µm wide. Antennal blade 20 µm long, reaching middle of fifth segment, accessory blade 115 µm long, reaching middle of fourth segment. Ring organ located at 0.5 of basal segment, 15 µm long from base. Lauterborn organ absent. Labrum: Both SI and SII slender, slightly broadened proximally, SI slightly smaller than SII, 0.6–0.7 times of SII in length. SIVA consisting of 2 segments, basal segment 10 µm long, distal segment 5 µm long. Pecten epipharyngis (Fig. 7 B) with 2 blunt teeth. Premandible with 2 pointed apical teeth, 60 µm long. Premandible brush present. Anterior margin of frontal apotome straight, with S 3 located in each corner. SL 1 and SL 2 present. (Fig. 7 C) Mandible (Fig. 7 D): Total length 100 µm long. Mandible teeth yellowish brown, other areas pale, 2 inner teeth, 1 apical tooth, third false tooth present on mola, apex of teeth somewhat flat. Seta subdentalis blade­like, relatively long, 30 µm long, extending length of inner tooth. Seta interna with 4 branches, most proximal branch apparently bifid, 30 µm long. Mentum (Fig. 7 E): Total length 100 µm, 50 µm high. Median teeth notched laterally, trifid, 25 µm wide. Outer 3 lateral teeth grouped into compound tooth, clearly set off from others. Ventromental plate 70 µm wide (w), 30 µm long (l), outer margin rugose. Separation between plates 47.5 µm. VmPR (w/l): 2.33; VmPSR(w/s): 1.47; mentum ratio (VmP/M): 0.70. Striae number 16. Setae submenti simple, distance between setae 65 µm. Postmentum 115 µm long. Maxillary palp (Fig. 7 F): Basal part 20 µm long, 15 µm wide, with ring organ 0.38 from base. Distal part with 4 blade­like and 1 two­segmented sensilla. Remarks: The larva resembles that of C. holsatus described by Lenz (1959), Moller­ Pillot (1984, Netherlands), and Nocentini (1985, Italy). The larva differs from others in the genus by the two­toothed pecten epipharyngis and loosely arranged mental teeth. In the Chinese specimen, SI is a little smaller than SII, SI/SII = 0.6–0.7 in length, similar to the Netherlands specimen described by Moller­Pillot (1984), but not as small as in the original description by Lenz (1959). The pupa, male, and female have not been found in China, so we treat this larva as C. sp. 3.Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, pp. 1-24 in Zootaxa 1086 on pages 15-17, DOI: 10.5281/zenodo.17048

Cryptotendipes nodus Yan, Tang & Wang, 2005, sp. n.

Cryptotendipes nodus sp. n. (Fig. 3 A–C) Type material: Holotype male, CHINA: Hainan Province: Bawangling, light trap, 11.V. 1988, X. Wang (BDN no. 1511). Paratype: 1 male, same data as holotype. 1 male, CHINA: Hubei Province, Shennongjia Mountain Natural Conservation, 2.XI. 2003, B. Ji. Etymology: The species name is from Latin nodus, swelling, in reference to the anal point with an apical swelling, which is unique within the genus. Diagnostic characters: The species is closely related to C. tobatertius Kikuchi et al., 1990 from Indonesia, but can be differentiated by the absence of frontal tubercles, the presence of sensilla chaeticae, the inner margin of the gonostylus with a slight projection bearing long setae, the superior volsella with 3 apical setae and without distal lateral setae, and an apically swollen anal point. Male imago (n = 3, unless otherwise stated) Total length 2.08–3.33, 2.69 mm. Wing length 1.02–1.63, 1.32 mm. Total length/wing length 2.04. Wing length/length of profemur 2.32–2.51, 2.44. Coloration: Thorax yellowish brown, scutellum and dorsum of scutum light yellow. Abdomen yellowish green. Front legs dark brown except basal 1 / 2 of femora yellowish brown; mid and hind legs yellowish green except tarsi V. Head: AR 1.54–1.94, 1.74. Ultimate flagellomere 400–670, 503 µm long. Frontal tubercles weakly developed, 5 µm in diameter. Temporal 8 –10, 9 setae, including 1 –3, 2 inner verticals, 3 –4, 4 outer verticals, and 3 –5, 4 postorbitals. Clypeus with 7 –14, 10 setae. Tentorium 97–130, 112 µm long, 20 –25, 23 µm wide. Palpomere lengths (in µm): 45 –48, 47; 68 –75, 73; 168–212, 188; 168–215, 187; 240–297, 267. Palp segments 5 th/ 3 rd 1.74–1.86, 1.80. Thorax: Antepronotals with 1 seta, acrostichals 2, dorsocentrals 6 –9, 7, prealars 3. Scutellum with 3 –5, 4 setae. Wing (Fig. 3 A): VR 1.18–1.28, 1.22. R with 0–2, 1 seta, R 1 bare, R 4 + 5 with 1 –2, 2 setae. Brachiolum 2 setae. Squama with 1 –5, 3 setae. Anal lobe well developed. Legs: Front tibia with 1–2 subapical setae, 70 –72, 71 µm and 75 µm long, spurs of middle tibia 17 –20, 18 µm and 10 –23, 16 µm long, comb with 10 –17, 13 teeth, 8 –10, 9 µm long; spurs of hind tibia 18 –20, 19 µm and 15 –25, 19 µm long, comb with 14 –21, 18 teeth, 10 –12, 11 µm long. Tarsus 1 of mid leg with 5 –7, 6 sensilla chaetica in distal 1 / 3. Lengths (in µm) and proportions of legs as in Table 3. Hypopygium (Fig. 3 B, C): Tergite IX acutely angular medially without long setae in central portion. Anal point 78 –92, 87 µm long, 12 –25, 18 µm wide at base, 5 –13, 10 µm wide at apex, with ridges at base of anal point extending to tergite IX widest at base, tapering towards middle, parallel­sided in distal half, apically strongly swollen and rounded, with 12 –18, 14 lateral setae medially. Laterosternite IX with 2 setae. Anal tergite bands V­shaped, separate medially with some lateral microtrichia. Phallapodeme 55–57 (2) µm long. Sternapodeme forming anterior sharp angle without transverse sternapodeme. Superior volsella 30 –34, 32 µm long, 6 –8, 7 µm wide, with 3 long apical setae and without microtrichia. Gonocoxite 63 –100, 79 µm long, gonostylus 105–133, 122 µm long. Inner margin of gonostylus with a basal slight projection with 8 –10, 9 long setae. HR 0.59–0.75, 0.65; HV 1.98–2.50, 2.18. Distribution: The species was found in Oriental China (Hainan and Hubei Province).Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, pp. 1-24 in Zootaxa 1086 on pages 7-9, DOI: 10.5281/zenodo.17048

Cryptotendipes Lenz

Key to males of Cryptotendipes Lenz 1. Inner margin of gonostylus with basal or median projection........................................ 2 ­ Inner margin of gonostylus without projection........................................................... 19 2. Inner margin of gonostylus with median projection..................................................... 3 ­ Inner margin of gonostylus with basal projection....................................................... 11 3. Anal point short, not longer than superior volsella....................................................... 4 ­ Anal point relatively long, longer than superior volsella.............................................. 5 4. Superior volsella columniform and straight, anal point rounded at apex........................ ................................................................. C. nigronitens (Edwards, 1929) (Palaearctic) ­ Superior volsella digitiform and curved, anal point pointed at apex.............................. ......................................................................... C. pflugfelderi Reiss, 1964 (Palaearctic) 5. Anal point with setae in basal half................................................................................ 6 ­ Anal point entirely without setae.................................................................................. 7 6. AR 2.4, superior volsella with 2 apical setae and without lateral setae.......................... ....................................................................... C. usmaensis (Pagast, 1931) (Palaearctic) ­ AR 1.58, superior volsella with 1 apical seta and 2 lateral setae.................................... .............................................................. C. tobatertius Kikucki & Sasa, 1990 (Oriental) 7. Superior volsella without microtrichia ............... C. emorsus (Townes, 1945) (Nearctic) ­ Superior volsella with microtrichia............................................................................... 8 8. Anal tergite with high ridge ............................ C. casuarius (Townes, 1945) (Holarctic) ­ Anal tergite without ridge.............................................................................................. 9 9. Superior volsella distinctly bilobed C. daktylos (Walley in Curran, 1934) (Neotropical) ­ Superior volsella not bilobed....................................................................................... 10 10. Superior volsella curved, swollen at apex and truncate, anal point tapering to point..... .............................................................................. C. pilicuspis Saether, 1977 (Nearctic) ­ Superior volsella straight, not swollen at apex, anal point parallel­sided to point.......... ..................................................................................... C. parallelus sp. n. (Palaearctic) 11. Tergite IX with pair of dorsal or ventral lobes............................................................ 12 ­ Tergite IX without lobes.............................................................................................. 14 12. Frontal tubercles absent, superior volsella pointed at apex, without microtrichia.......... .......................................................... C. tobasecundus Kikucki & Sasa, 1990 (Oriental) ­ Frontal tubercles present, superior volsella obtuse at apex, covered by microtrichia. 13 13. Bands of tergite IX joined, superior volsella constricted in middle, widened at apex.... ............................................................................... C. acalcar Reiss, 1990 (Palaearctic) ­ Bandsoftergite IXseparated,superior volsellaslightly swollen in middle,roundedat apex .................................................... C. mongolkeleus (Sasa & Suzuki, 1997) (Palaearctic) 14. Tergite IX with distinct caudolateral shoulders ... C. darbyi (Sublette, 1960) (Holarctic) ­ Tergite IX without caudolateral shoulders.................................................................. 15 15. Superior volsella covered by microtrichia.................................................................. 16 ­ Superior volsella without microtrichia........................................................................ 17 16. AR 2.26–2.66, superior volsella twice as wide at base as at middle, gonostylus obtuse at apex ........................................ C. mongoljekeus (Sasa & Suzuki, 1997) (Palaearctic) ­ AR 3.1–3.5, width of superior volsella at base equal to at middle, gonostylus pointed at apex ..................................................................... C. ariel (Sublette, 1960) (Nearctic) 17. Anal point without lateral setae ........ C. daitogeheus Sasa & Suzuki, 2001 (Palaearctic) ­ Anal point with lateral setae........................................................................................ 18 18. Gonostylus rounded at apex, superior volsella straight, with apical and lateral setae. LR 1.34–1.44 ................................... C. mongolijeus Sasa & Suzuki, 1997 (Palaearctic) ­ Gonostyluspointedatapex,superiorvolsellacurved,withapical setaeonly.LR 1.69–1.84 ............................................................................. C. nodus sp. n. (Oriental, Palaearctic) 19. Tergite IX with distinct caudolateral shoulders........................................................... 20 ­ Tergite IX without caudolateral shoulders.................................................................. 21 20. Anal point widest at base, parallel­sided, superior volsella not sclerotized.................... .................................................................................. C. lenzi Zorina, 2001 (Palaearctic) ­ Anal point widest at apex, superior volsella sclerotized................................................. ........................................................................... C. secundus Zorina, 2003 (Palaearctic) 21. Gonostylus apically pointed .................................. C. holsatus Lenz, 1959 (Palaearctic) ­ Gonostylus apically rounded .............. C. pseudotener (Goetghebuer, 1922) (Holarctic)Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, pp. 1-24 in Zootaxa 1086 on pages 20-21, DOI: 10.5281/zenodo.17048

Demicryptochironomus (Irmakia) spatulatus Wang & Zheng 1994

Demicryptochironomus (Irmakia) spatulatus Wang & Zheng 1994 (Figs. 9 A–C) Demicryptochironomus (Irmakia) spatulatus Wang & Zheng 1994: 206 Material examined: Holotype (BDN no. 05113) and Paratype (BDN no. 05114) males: Hainan Province, Diaoluo County, 20. V. 1988, light trap, X. Wang. Diagnostic characters: The species is most similar to D. (I.) banepae. It can be separated by the tennis­racket like anal point with ridges at the base extending to tergite IX and with short lateral setae. Male imago (n = 2, except when otherwise stated) Total length 3.53–3.78 mm. Wing length 1.60–1.65 mm. Total length/wing length 2.14–2.36. Wing length/length of profemur 1.88–1.90. Coloration: Thorax yellowish green, femora of front leg light green, tibiae and tarsi of front leg dark brown, tarsi 1 and 2 of mid leg dark brown, remainder of mid and hind leg yellowish brown. Abdomen yellowish green. Head: AR 2.03. Ultimate flagellomere 630–670 µm long. Frontal tubercles small, 7 µm long, 5 µm wide. Temporal setae 11–12, including 5–6 inner verticals, 4–6 outer verticals, and 0–2 postorbitals. Clypeus with 13–15 setae. Tentorium 125–150 m long, 37–38 m wide. Palpomere lengths (in µm): 45, 38– 48, 135–145, 148 – 165, 215 – 220. Thorax: Antepronotals 4, dorsocentrals 7–11, acrostichals 10–14, prealars 4. Scutellum with 14 or 15 setae. Wing (Fig. 9 A): VR 1.19–1.20, R with 20–21 setae, R 1 with 16 setae, R 4 + 5 with 26–29 setae. Brachiolum with 2 setae. Squama with 7–9 setae. Anal lobe well developed. Legs: Front tibia with 2 subapical setae, 130–132 µm; 140–142 µm long, spur of middle tibia 25 µm; 28–30 µm long, comb with 37–38 teeth, 10 –12, 11 µm long; spur of hind tibia 25–28 µm; 38 µm long, comb with 40–44 teeth, 10 –14, 12 µm long. Tarsus 1 of mid legs with sensilla chaetica 1–2. Lengths (in µm) and proportions of legs: Hypopygium (Figs. 9 B, C): Tergite IX with 12–13 setae. Laterosternite IX with 2–4 setae. Anal tergite bands Y­shaped. Anal point 70–75 µm long, spatulate, apically rounded, widened medially, with ridges at base extending to tergite IX, and with short lateral setae. Phallapodeme 70–83 µm long. Transverse sternapodeme 42–47 µm long. Superior volsella slender, parallel sided, 85–92 µm long, rounded and slightly swollen at apex, with 2 long setae, and without microtrichia. Gonocoxite 95–97 µm long and inner margins forming sharp median angle. Gonostylus 185–193 µm long, constricted in middle, slightly bent inward apex, with strong longitudinal keel and 14 inner marginal setae, HR 0.49– 0.52, HV 1.91–1.96. Distribution: This species is known only from the type locality (Oriental region).Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, Demicryptochironomus Lenz from China (Diptera: Chironomidae), pp. 1-31 in Zootaxa 910 on pages 22-23, DOI: 10.5281/zenodo.17100

Demicryptochironomus

Demicryptochironomus sp. 1 (Figs. 10 A–E) Material examined: 1 larva, China, Hebei Province, Zunhua County Sahe River, 5. X. 1999, leg. X. Wang. Fourth­instar larva Small species, total length 2.89 mm, with pale brown color in alcohol. Head capsule and posterior occipital region pale. Head capsule 150 µm wide, 192.5 µm long, cephalic index (W/L) 0.78. Antenna (Fig. 10 A): Total length 118 µm long, about 0.61 times as long as head; with 6 segments, each segment length (in µm): 37.5, 15, 20, 25, 5, 2. AR 0.57–0.60. Basal segment 12.5 µm wide, ratio (L/W): 3.0. Ring organ located in apical third of basal segment, 4 µm in diameter, distance from base 27.5 µm. Second antennal segment relatively long, 7.5 µm wide, twice as long as wide. Blade situated at 1 / 2 of third segment, 37.5 m long, extending to apex of fifth segment. Accessory blade short. Style located at apex of fifth segment, about as long as fifth segment. Labrum: SI hair­like, small. SII simple and strong, blade­like, 40 µm long, extending to posterior part of ungula. SIV divided into 3, each division length (in µm) 12.5, 10, and 5. Premandible (Fig. 10 B) 45 µm long, with 3–4 teeth. Mandible (Fig. 10 C): Total length 60 µm long. With apical tooth and 2 sharp inner teeth. Apical tooth 15 µm long, combined width of inner teeth 7.5 µm. Seta interna with 2 long blade­like branches. Pecten mandibularis with 2 or 3 short branches, not extending beyond the inner margin of mandible. Mentum (Fig. 10 E): 62.5 µm wide, with 7 pairs of dark brown lateral teeth, and 1 semicircular pale median tooth. Each half of sclerotized lateral teeth 17.5 µm wide and median pale tooth 25 µm wide. Ventromental plate slender longer, 80 µm wide, with numerous striae; distance between ventromental plates 35 µm Maxillary (Fig. 10 D): Maxillary palp with 2 parts, basal portion about 3 times as long as wide (length 30 µm; width 10 µm), distal 1 / 3 not well sclerotized. Second part 20 µm long, with 4–6 short blades, b sensillum 3 ­segmented, with ratio between segments 2: 3: 1. Abdomen: Posterior parapods 120 µm long, 60 µm wide. Procercus 22.5 µm high and 25 µm wide, with 8 anal seta, 450–500 µm long, two small subapical anal setae each 50 µm long. Supraanal seta 250 µm long, longer than posterior parapods. Anal tubules 2 pairs, upper pairs sausage­like, 62.5 µm long and 25 µm wide; lower pairs broadly triangular, 87.5 µm long, 37.5 µm wide. Ecology: The larva was collected from sandy substrata in the Sahe River, a branch of the Luanhe River, in shallow water less than 0.5m deep. Remarks: The larva is distinguished by having a 6 ­segmented antenna and a maxillary palpiger with well developed 3 ­segmented A seta, which differs from the diagnosis of the genus (antenna with 7 segments). Other characters agree with the generic diagnosis given by Pinder and Reiss (1983). Measurements (except for the number of antennal segments) resemble those of Demicryptochironomus fastigatus (Townes) and Demicryptochironomus sp. A sensu Epler (2001). The elongated fourth segment of D. sp. 1 is subequal to the combined lengths of the fourth and fifth segments of other larvae in this genus. As only one larval specimen was examined, we temporarily treat it as D. sp. 1 in the preliminary key to known larvae of the genus (given below).Published as part of Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, Demicryptochironomus Lenz from China (Diptera: Chironomidae), pp. 1-31 in Zootaxa 910 on pages 24-25, DOI: 10.5281/zenodo.17100

A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China

Yan, Chuncai, Tang, Hongqu, Wang, Xinhua (2005): A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China. Zootaxa 1086: 1-24, DOI: 10.5281/zenodo.17048