Typhlotanais grahami Blażewicz-Paszkowycz, 2004, n. sp.

<i>Typhlotanais grahami</i> n. sp. (Fig. 1–3) <p> <i>Peraeospinosus</i> sp.: Blażewicz & Jażdżewski, 1996 <i>Polish Polar Research</i>, 17, 213–220 <i>Peraeospinosus</i> sp. A: Blażewicz­Paszkowycz & Jażdżewski (2000) <i>Polish Polar Research</i>, 21(3– 4), 171–180</p> <p> <i>Peraeospinosus</i> sp. A: Blażewicz­Paszkowycz & Sekulska­Nalewajko (2004) <i>Polar Biol</i>, 27, 222– 230</p> <p> <b>Diagnosis</b>. Female body length up to 1 mm, carapace smooth, rounded laterally, as long as wide; rostrum rounded; pereonites smooth rounded laterally; pleonites 1 <b>–</b> 5 similar in size; pleotelson rounded; mandible molar process well developed, with undulated, smooth (no spines or teeth) crushing surface; maxillule palp with nine terminal spiniform setae (two are fused together); chela (propodus) similar size as carpus, twice as long as wide; pleopodal endopod proximal seta reduced; uropod exopodite and endopodite 1­articled, exopodite about 2/3 of endopodite, its longer distal with large basal part and bend in the ¼ of it’s length. uropod endopodite with five terminal simple seta. Male of swimming type; body length 0.78 mm; carapace a little shorter than length of pereonites 1–2; all pereonites and pleomeres subequal except pereonites 5–6 that are longer; Pleotelson with well­developed caudal processes.</p> <p> <b>Material examined:</b> Holotype, non­ovigerous female (NSNM 1024255), body length 1 mm, Admiralty Bay, Ezcurra Inlet, Herve Cove (King George Island, South Shetland Islands, Antarctic); sample no. D­42 collected on 20 December 1993 at the depth 6 m during SCUBA diving within XVII Polish Antarctic Expedition; Paratypes from the same locality (NSNM 1024256; 668 specimens).</p> <p> <b>Additional material:</b> Admiralty Bay (King George Island): OC­245, depth 15 m, 2 Jan 1980 Van Veen Grab (VVG): 8 ΨΨ; OC­297, depth 18 m, 7 Mar 1980, VVG: 14 ΨΨ; OC­299, depth 15 m, 7 Mar 1980, VVG: 88 ΨΨ; OC­304, depth 10 m, 7 Mar 1980, VVG: 389 ΨΨ, 61 ɗɗ, 17 mancae; OC­302, depth 17 m, 7 Mar 1980, VVG: 3 ΨΨ; OC­306, depth 30m, 8 Mar 1980, VVG: 1 Ψ; OC­370, depth 47 m, 12 Nov 1983, dredging: 2 ΨΨ; OC­371, depth 57 m, 12 Nov 1983, dredging: 1 Ψ; OC­431, depth 120 m, 8 Feb 1985, VVG: 1 Ψ; OC­457, depth 46 m, 17 Mar 1985, VVG: 2 ΨΨ; OC­544, depth 20 m, 5 Jan 1986, VVG, 46 ΨΨ; OC­545, depth 26 m, 5 Jan 1986, VVG: 9 ΨΨ; OC­467, depth 33 m, 20 Mar 1985, VVG: 7 ΨΨ; OC­526, depth 45 m, 6 Nov 1985, VVG: 3 ΨΨ; OC­439, depth 52 m, 16 Feb 1985, VVG: 5 ΨΨ; OC­440, depth 56m, 16 Feb 1985, VVG: 8 ΨΨ; OC­582, depth 80 m, 17 Jan 1988 (dredging): 1 Ψ; D­ 15/VIII, depth 6 m, 6 Mar 1993, VVG: 7 ΨΨ; D­ 16/VI, depth 6 m, 12 Mar 1993, VVG: 152 ΨΨ; D­36, depth 3 m, 17 Dec 1993 (SCUBA): 10 ΨΨ; D­38, depth 9 m, 17 Dec 1993 (SCUBA): 242 ΨΨ; D­39, depth 12 m, 17 Dec 1993 (SCUBA): 173 ΨΨ; D­44, depth 10 m, 20 Dec 1993 (SCUBA): 172 ΨΨ; D­ 50, depth 20 m, 30 Jan 1994 (SCUBA): 162 ΨΨ; D­51, depth 6 m, 7 Jan 1994 (SCUBA): 14 ΨΨ; D­52, depth 2 m, 8 Jan 1994 (SCUBA): 7 ΨΨ; D­53, depth 3 m, 8 Jan 1994 (SCUBA): 1 Ψ.</p> <p> <b>Description</b>. <i>Ovigerous female</i>. Body length 1 mm (Fig. 1 A, 1B), 4.5 times as long as wide; carapace smooth, rounded laterally, and as long as wide; rostrum rounded; pereonites smooth with rounded lateral margins: pereonite 1 and 6 short, pereonite 2 and 3 slightly longer, pereonite 4 and 5 the longest; pleonites 1 <b>–</b> 5 similar in size; pleotelson rounded; caudal projection reduced (Fig. 1 E).</p> <p>Antennule (Fig. 1 F): 3­articled; article 1 massive, about 1.5 times longer than article 2 and 3 combined, with distal and medial setae; article 2 shorter than article 3, with two simple and one plumose setae; article 3 tipped by five simple terminal setae.</p> <p>Antenna (Fig. 1 G): 6­articled; article 1 short; article 2 slightly longer than article 3, with one simple seta; article 4 twice as long as article 5, armed with two short distal setae; 5 with one simple distal seta; article 6 with two simple subterminal setae and four terminal setae.</p> <p> Mouthparts: Labrum (Fig. 2 C) hood­shaped, covered by numerous minute setae. Mandible (Fig. 2 A, 2B) massive; molar process well developed, with undulated, smooth edges; right mandible (Fig. 2 B) incisor with sharp smooth margin; left mandible (Fig. 2 A) incisor undulated; <i>lacinia mobilis</i> well developed undulated. Maxillule (Fig. 2 D) inner endite equal to palp, armed with nine terminal spiniform setae (two are stuck together, see Figure 4); palp with two pinnate setae of different lengths. Maxilla (Fig. 2 E) kidney­shaped, naked. Maxilliped (Fig. 2 F): coxa reduced; bases elongated and fused; each with simple setae; endite armed with plumose seta and two flat setae on distal margin; palp 4­articled: article 1 naked, article 2 wedge­shaped with two bipinnate setae on inner margin, article 3 trapezoidal with three bipinnate and one simple setae on inner margin, article 4 slender (1.5 times as long as wide) with one simple seta on outer margin and five bipinnate terminal setae.</p> <p>Cheliped (Fig. 2 G): slender; basis with one simple seta on outer margin, posterior margin rounded; merus wedge­shaped with seta on ventral margin; carpus twice as long as wide (length wide ratio 2.1), with two setae ventrally; chela subequal to carpus, twice as long as wide, with one seta at insertion of dactylus; inner margin of fixed finger with two or three teeth and three setae in distal part, ventral margin with two simple setae; dactylus slightly curved, with two spiniform setae on inner margin.</p> <p>Pereopod 1 (Fig. 2 H) of walking type; basis naked, longer than ischium, merus and carpus combined; ischium short; carpus slightly longer than merus but shorter than propodus; ischium, merus and carpus each with one ventral seta; carpus also with dorsal seta, propodus with two serrate, subdistal setae; unguis 1.5 times as long as dactylus.</p> <p>Pereopod 2 (Fig. 2 I) of walking type; basis subequal to rest of articles combined; ischium short, with one seta on ventral margin; merus subequal to carpus, both with two distal setae (carpal setae one shorter than another); propodus longer than carpus, dorsal margin with two distal setae and two spiniform setae on ventral margin; dactylus shorter than unguis.</p> <p>Pereopod 3 (Fig. 2 J) similar to pereopod 2 but one distal carpal seta modified to short spiniform seta.</p> <p>Pereopod 4 (Fig. 2 K) of clinging type; basis wide slightly shorter than ischium, merus and carpus combined, with two pinnate setae distally; ischium with one seta; carpus subequal to merus with two subdistal setae on dorsal margin, and couples of specialised spines/cusps on merus and carpus; propodus twice as long as carpus ventral margin with one terminal serrate seta and two spiniform setae; dactylus tipped by minute unguis.</p> <p>Pereopod 5 (Fig. 2 L): similar to pereopod 4 except merus with two additional spiniform setae.</p> <p>Pereopod 6 (Fig. 2 M): similar to pereopod 5 but basis naked, ischium with two simple setae, propodus with three terminal setae.</p> <p>Pleopod 1–5 (Fig. 1 H): all pleopods similar; basal article with one circumplumose seta, endopod outer margin with six plumose setae, inner margin with one plumose seta; exopod armed with twelve plumose setae on outer margin; proximal seta reduced.</p> <p>Uropod (Fig. 1 D, 1E): uropod exopodite and endopodite 1­articled, exopodite about 2/ 3 of endopodite, its longer distal with large basal part and bend in the ¼ of it’s length; uropod endopodite with five terminal simple setae.</p> <p> <i>Male</i> (Fig. 1 C): of swimming type; body length 0.78 mm cephalothorax a little shorter than the length of three first pereonites. All pereonites and pleonites subequal except pereonite 5 and 6, which are longer than others. Pleotelson with well­developed caudal processes (Fig. 3 L).</p> <p>Antennule (Fig. 3 A): 7­articled; article 1 and 2 subequal and massive with some simple medial setae; article 3 twice as long as article 4 and with two distal setae, article 5 as</p> <p>long as article 6 and 7 combined, article 6 little longer than 7; articles 4–7 with aesthetascs.</p> <p>Antenna (Fig. 3 B): 7­articled, articles 1–4 subequal, article 3 with one distal seta; article 5–6 subequal, article 7 half as article 6 length; articles 5–7 with simple subdistal or distal setae.</p> <p>Maxilliped (Fig. 3 C): bases fused; endite lobe­shaped; palp 4­articled: article 1 unarmed, article 2 with distal setae, articles 3 and 4 armed in with four distal setae.</p> <p>Cheliped (Fig. 3 D): slender; basis unarmed and rounded distally, merus wedge­shaped with simple seta on ventral margin; carpus more massive than that of female (length: wide ratio 1.7), trapezoidal, with two setae on ventral margin; chela more slender than carpus, fixed finger tipped by large spinose seta, three setae on dorsal margin, one on ventral margin; propodus inner side with row of nine setae distally (eight short and one long); dactylus slightly curved with two spiniform setae on inner margin.</p> <p>Pereopod 1 (Fig. 3 E): of walking type; basis slightly shorter than ischium, merus, carpus combined; ischium short, with one seta; merus and carpus subequal; propodus slightly longer than carpus; dactylus as long as half propodus with long unguis (longer than dactylus).</p> <p>Pereopod 2 (Fig. 3 F): similar to pereopod 1, but a little shorter, ischium, merus, carpus and propodus with one simple seta on distal edge, propodus with one seta on dorsal margin additionally.</p> <p>Pereopod 3 (Fig. 3 G): similar to pereopod 2.</p> <p>Pereopod 4 (Fig. 3 H): of walking type; length proportions of articles are similar to pereopod 1; ischium with one seta, merus and propodus distal parts with two/three distal spiniform setae; carpus dorsal margin one aesthetascs (rod­like seta) propodus dorsal margin with one terminal seta; dactylus subequal to unguis.</p> <p>Pereopod 5 (Fig. 3 I): similar to pereopod 4 but basis more massive and armed with plumose submedial setae.</p> <p>Pereopod 6 (Fig. 3 J): similar to pereopod 4 but ischium with two setae and propodus armed with three terminal spiniform setae.</p> <p>Pleopods 1–5 (Fig. 3 K): all pleopods of similar size and structure; endopod with five long plumose setae on outer margin and single seta on inner margin; exopod with nine plumose setae on outer margin.</p> <p>Uropod (Fig. 3 L, 3M) exopod 1­articled, as long as endopod article 1, with two terminal setae and simple short seta in the middle of article; exopod 2­articled; articles subequal; article 2 with five terminal simple setae.</p> <p> <b>Distribution</b>. Species known only from the type locality: Admiralty Bay, King George Island, South Shetland Islands, the Antarctic; depth range 2– 120 m.</p> <p> <b>Etymology</b>. This species is named in honour of Dr Graham Bird (Sunfish Consultants Ldt., U.K.) in recognition of his extensive experience in Tanaidacea.</p> <p> <b>Remarks</b>. The female of the new species is characterized by (1) a smooth carapace, as long as it is wide; (2) pereonites smoothly rounded laterally; (3) a rounded pleotelson; (4) an undulated, smooth mandible molar process; (5) nine terminal spiniform setae (two are fused together) on the maxillule palp; (6) a chela (propodus) of similar size to the carpus, and twice as long as it is wide; (7) a reduced proximal seta on the pleopodal endopod; (8) a uropod exopodite with one article, about 2/3 of the endopodal length, which is longer distally with a large basal part and a bend about a quarter of the way along its length.</p> <p> Genus <i>Typhlotanais</i> is represented in Antarctic waters by eight species: <i>T. dubius</i> Tzareva, 1982, <i>T. gruzovi</i> Tzareva, 1982, <i>T. greenwichensis</i> Shiino, 1970, <i>T. longus</i> Kudinova­ Pasternak, 1975, <i>T. parangularis</i> Kudinova­Pasternak, 1975, <i>T. parvus</i> Sieg, 1986, <i>T. plicatus</i> Kudinova­Pasternak, 1993, and <i>T. grahami</i> n. sp. The most distinct of these <i>Typhlotanais</i> species is <i>T. plicatus</i> with its unique transverse rings on pereonites 1–3. <i>Typhlotanais parangularis</i> is characterized by trapezoidal­shape pereonites 1–3, by a bifurcated unguis on pereopods 4–6, and chelipeds which are attached anteriorly, i.e. the edge of the cheliped basis does not reach the first pereonite. <i>Typhlotanais longus</i> is distinguished by a long pereonite 1 (subequal to carapace) and a trifurcated unguis on pereopod 6, while <i>T. greenwichensis</i> displays projections on the basis of pereopods 1–3 and a row of minute setae on the dorsal margin of the carpal cheliped; <i>T. dubius</i> has a thick spiniform seta near the cheliped unguis and an acute mandibular molar process, while <i>T. gruzovi</i> has pereopod 4 and 5 adapted for walking. The acute molar part of the mandible and the lack of clinging pereopods 4–6 should separate both the species (<i>T. dubious</i> and <i>T. gruzovi</i>) of genus <i>Typhlotanais</i>. However, because the type material is not available for re­examination, their taxonomical status must be accepted at the present stage. <i>Typhlotanais grahami</i> is superficially most similar to <i>T. parvus</i> but laterally rounded carapace and characteristic setation of exopod uropod immediately distinguish <i>T. grahami</i> from <i>T. parvus</i>.</p>Published as part of <i>Blażewicz-Paszkowycz, Magdalena, 2004, A description of a new species of Typhlotanais (Crustacea: Tanaidacea) from West Antarctic with a note on the genus, pp. 1-12 in Zootaxa 535</i> on pages 2-9, DOI: <a href="http://zenodo.org/record/157212">10.5281/zenodo.157212</a&gt

Collettea

Key to species of the Collettea 1 Pleon shorter than pereonites 4­6 combined length..................................................... 2 ­ Pleon longer than pereonites 4­6 combined length....................................................... 3 2 Pereonite 2 only 0.25 times longer than pereonite 1............................... Colettea sp. C ­ Pereonite 2 almost twice as long as pereonite 1....................................... C. humboldti 3 Uropods long (about as long as half of pleotelson)...................................................... 4 ­ Uropods short (less than ¼ of pleotelson)................................................................... 6 4 Body short (7 times longer than wide) .......................................................... C. minima ­ Body long (11–15 times longer than wide)................................................................. 5 5 Pereonite 2–3 longer than wide, exopod uropod longer than half length of endopod proximal article............................................................................................. C. elongata ­ Pereonite 2–3 wider than long, exopod uropod shorter than endopod proximal article half length..................................................................................................... C. lilliputa 6 Pleon clearly shorter than pereonites combined length............................................... 7 ­ Pleon at least as long as all pereonites combined length............................................ 15 7 Chela fixed finger with one seta................................................................................... 8 ­ Chela fixed finger with two setae.............................................................................. 11 8 Pleotelson about as long as wide. Cheliped merus and carpus with 1–2 long seta(­ae) ventrally.................................................................................................... C. longipedia ­ Pleotelson clearly longer than wide. Cheliped merus and carpus without setae.......... 9 9 Carapace elongated twice as long as wide; antennule article 1 clearly longer than rest articles combined length................................................................................ C. subtilis ­ Carapace short, no longer than 1.5 of width; Antennule article 1 clearly shorter than rest articles combined length....................................................................................... 10 10 Pereonites 1–3 subequal. Carapace longer than pereonite 1­3 combined length................................................................................................................................... C. wilsoni ­ Pereonite 2 and 3 longer than pereonite 1. Carapace shorter than pereonite 1­3 com­ bined length........................................................................................... Collettea sp. B 11 Pleotelson as long as pleonites combined length .............................. C. rotundicaudata ­ Pleotelson shorter than pleonites combined length................................................... 12 12 Uropod endopod one articulated .................................................................. C. pegmata ­ Uropod endopod bi­articulated.................................................................................. 13 13 Cephalothorax short (shorther than 1.25 width) ........................................ C. cylindrata ­ Cephalothorax long (about 1.5 as long as width)....................................................... 14 14 Pereonite 4 and 5 as wide as long, pleon shorter than pereonites 2­5 combined length .......................................................................................................................... C. alicjae ­ Pereonite 4 and 5 clearly wider than long, pleon as long as all pereonites combined length.......................................................................................................... C. antarctica 15 Pereonite 6 square or longer than wide...................................................................... 16 ­ Pereonite 6 wider than long........................................................................................ 17 16 Pleotelson longer than pleonites 3–5 combined length......................... C. longipleona ­ Pleotelson shorter than pleonites 3–5 combined length........................ C. vermiformis 17 Pereonite 5 longer than wide..................................................................................... 18 ­ Pereonite 5 wider than long............................................................... C. cylindratoides 18 Pereonite 6 subequal to 4 th......................................................................................... 19 ­ Pereonite 6 much shorter 4 th.................................................................... C. larviformis 19 Cephalothorax short, about 1.25 times longer than wide, cheliped fixed finger with short and long seta ventrally........................................................................ C. arnaudi ­ Cephalothorax long, more than 1.5 times longer than wide, cheliped fixed finger with two long seta ventrally.......................................................................... Collettea sp. APublished as part of Blażewicz-Paszkowycz, Magdalena & Larsen, Kim, 2005, New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic., pp. 1-19 in Zootaxa 1085 on pages 3-4, DOI: 10.5281/zenodo.17045

Collettea

Collettea sp. B (Figs. 7 C, D) Material examined. Non­ovigerous female (ZMH K­ 40916): Polarstern Cr. PS 134 / 4; 65 ° 19.20 '­ 65 ° 19.15 ' S, 48 °03.81'­ 48 °03.34' W, depth 6030 m, 0 9 Mar 2002. Distribution. Species known only from type locality, atlantic sector of Southern Ocean, between South Orkney Islands and Antarctic Peninsula.Published as part of Blażewicz-Paszkowycz, Magdalena & Larsen, Kim, 2005, New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic., pp. 1-19 in Zootaxa 1085 on page 18, DOI: 10.5281/zenodo.17045

Collettea longipleona Blażewicz-Paszkowycz & Larsen, 2005, sp. nov.

Collettea longipleona sp. nov. (Figs. 5–6) Diagnosis. Female. Pereonite 2 longer that pereonite 1. Pereonite 6 almost as long as pereonite 5. Pleon marginally longer than pereon. Pleonites long, about two­thirds as long as wide. Pleotelson longer than last three pleonites. Antenna article 4 without fusion line. Maxilliped endite with one distal seta only. Cheliped fixed finger with several prominent pointed denticles. Cheliped dactylus as long as fixed finger. Uropods short, not protruding beyond apex of pleotelson; endopod uni­articulated. Male. Unknown. Material examined. Non­ovigerous female holotype, body length 3.5 mm (ZMH­K 40911): Polarstern Cr. PS 61 / 141 ­ 10; 58 ° 25.08 '­ 58 ° 24.93 ' S, 25 ° 0.77 '­ 25 ° 0.95 ' W; depth 2313 ­ 2281 m, 23 Mar 2002. Paratypes: 1 non­ovigerous female dissected (ZMH­K 40912), same locality as holotype. Etymology. Named to reflect the elongate pleon of this species (Latin: longus = long + pleona = pleon in feminine form). Description. Adult female. Body (Fig. 5 A) 11 times as long as broad. Cephalothorax longer than combined length of pereonites 1 and 2. Eye lobes present but without visual pigment. Pereonites 1–3 wider than long. Pereonite 2 longer than pereonite 1. Pereonite 4 as long as wide. Pereonites 5 and 6 longer than wide. Pleon long, about 40 % of total body length. All pleonites subequal. Pleotelson longer than combined length of three pleonites. Antennule (Fig. 5 B). As long as cephalothorax, with five articles. Article 1 as long as rest of antennule combined, with one distal seta. Article 2 shorter than article 4, with two simple distal setae. Article 3 shorter than article 2, with two simple and one setulose distal setae. Article 4 length less than half the length of article 1, with five simple distal setae. Article 5 minute and partly obscured under extension of article 4, with one simple seta and one aesthetask. Antenna (Fig. 5 C). As long as antennule. Article 1 fused to the body, naked. Article 2 twice as long as article 3, with one simple distal seta. Article 3 as long as article 1, with one distal seta. Article 4 longer than two preceding articles combined, with two simple distal setae, no trace of fusion line. Article 5 shorter than article 2, with one distal simple seta. Article 6 minute with four distal setae. Mouthparts. Labrum (Fig. 5 D) flat and setulose. Mandible molar process longer than incisor and relatively broad with few denticles and group of small spines. Left mandible (Fig. 5 E) lacinia mobilis broad and larger than incisor, with three denticles; incisor with four denticles. Right mandible (Fig. 5 F) incisor with three denticles. Labium (Fig. 5 I) with one pair of naked lobes. Maxillule (Fig. 5 G) endite with eight distal spiniform setae. Palp not recovered. Maxilla not recovered. Maxilliped (Fig. 5 H) basis much wider than endite, rectangular. Each endite with two subdistal setae and one tubercle process distally. Palp article 1 smooth; article 2 with three inner setae; article 3 with four inner setae; article 4 with five inner and one outer seta. Epignath not recovered. Cheliped (Fig. 6 A). Basis divided unequally by sclerite attached distally, shorter than carpus, naked. Merus naked. Carpus as long as propodus inclusive fixed finger, with two dorsal setae. Propodus with row of setae at dactylus insertion. Fixed finger with ventral and three inner setae, with several (about nine) prominently pointed denticles on inner margin. Dactylus as long as fixed finger. Pereopod 1 (Fig. 6 B). Coxa naked. Basis longer than three succeeding articles combined, naked. Ischium with one ventral seta. Merus shorter than carpus, widening distally, with one small spiniform ventro­distal seta. Carpus three­quarters the length of propodus, with three spiniform setae of which at least one is serrated. Propodus almost half as long as basis, with three spiniform distal setae of which at least one is serrated, and dorsal spine. Dactylus and unguis of subequal length and combined shorter than propodus. Dactylus with small seta at unguis insertion. Unguis with uneven spatulate tip. Pereopod 2 (Fig. 6 C). As pereopod 1 except: propodus with one ventral spiniform seta and dorsal spine. Dactylus naked. Pereopod 3 (Fig. 6 D). As pereopod 2 except: dactylus with small seta at unguis insertion. Pereopod 4 (Fig. 6 E). As pereopod 3 except: basis with two setulate ventro­medial setae. Merus with two serrated spiniform ventro­distal setae. Carpus with four serrated spiniform setae and one simple distal setae. Propodus with two serrated spiniform ventrodistal setae and dorsal spine. Dactylus and unguis combined longer than propodus, subequal. Pereopod 5 (Fig. 6 F). As pereopod 4 except: basis and ischium naked. Pereopod 6 (Fig. 6 G). As pereopod 4 except: carpus with only three serrated spiniform setae and one simple distal setae. Pleopods. No pleopods in female. Uropods (Fig. 6 H). Short (not protruding apex of pleotelson). Protopod as long as endopod, naked. Endopod uni­articulated, with four long, simple setae and two small setulate distal setae. Exopod about half as long as endopod, with two small simple setae and one long distal seta. Distribution. Species known only from type locality, atlantic sector of Southern Ocean, out of Weddell Sea at the depth range 2313 ­ 2281 m. Remarks. Collettea longipleon n. sp., as well as C. arnaudi (Shiino), C. cylindrata (G. O. Sars), and C. cylindratoides Larsen, is distinguishable from most other colletteids by the pleon being subequal to pereon in length, but C. longipleona has, in contrast to the last three species, an uniarticulated uropodal endopod, and only one ventral setae on the fixed finger of the cheliped.Published as part of Blażewicz-Paszkowycz, Magdalena & Larsen, Kim, 2005, New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic., pp. 1-19 in Zootaxa 1085 on pages 12-16, DOI: 10.5281/zenodo.17045

FIGURE 5. Collettea longipleona n in New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic.

FIGURE 5. Collettea longipleona n. sp. A, female holotype: lateral view; female paratype: B, antennule; C, antenna; D, labrum, E, F, mandibles left and right, respectively; G, maxillule; H, maxilliped; I, labium. Scale bar: 0.1mm for A–C; 0.01 mm for D–I

Collettea

Collettea sp. C (fig. 7 E) Material examined. Non­ovigerous (ZMH K­ 40917): Polarstern Cr. PS 133 / 3; 65 ° 20.15 '­ 65 ° 20.06 ' S, 54 ° 14.35 '­ 54 ° 14.51 ' W, depth 1116­1122, 0 7 Mar 2002. Distribution. Species known only from type locality. Atlantic Sector of Southern Ocean, between Elephant Island and Antarctic Peninsula.Published as part of Blażewicz-Paszkowycz, Magdalena & Larsen, Kim, 2005, New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic., pp. 1-19 in Zootaxa 1085 on page 18, DOI: 10.5281/zenodo.17045

Collettea Lang 1973

Genus Collettea Lang, 1973 Diagnosis. Female (modified after Larsen 2000): Antennule 4 ­ or 5 ­articulated (the terminal 5 th article rudimental). Antennae 6 ­articulated, occasionally with fusion line at 4 th article. Body almost completely cylindrical. Cephalothorax longer than broad. Eye lobes present but without visual elements. Pleonites without lateral edges of dorsal shield. Pleon longer than half of pereon. Pleotelson mostly longer than last three pleonites combined, terminating in dorsal plate covering uropods. Mandibles with broad molar, usually with a row of spines. Labium consists of two simple lobes (M­shape). Pereopods slender, all with coxa, dactylus and unguis not fused to hook. Pleopods absent in females. Uropods with two rami; endopod with one or two articles; exopod uni­articulated. Male: similar to female. Functional mouthparts retained in adults. Antennule thicker than in female. Small pleopods present, most often with simple setae. Type species. Strongylura cylindrata G. O. Sars, 1882.Published as part of Blażewicz-Paszkowycz, Magdalena & Larsen, Kim, 2005, New species of the genus Collettea Lang, 1973 (Peracarida: Tanaidacea, Colletteidae) from the Antarctic., pp. 1-19 in Zootaxa 1085 on page 2, DOI: 10.5281/zenodo.17045