Some littoral anomopods (Crustacea) from Central Amazonia

Samples collected in Central Amazonia contained 16 species of Chydoridae, 4 species of Macrothricidae and 1 species of Ilyocryptidae. A new chydorid, Celsinotum laticaudatum sp. nov. is described, clearly differing from Australian species of this genus. Variation of Alona dentifera (Sars, 1901) is commented upon, as well as a peculiar specimen of Alona. © 1995 Kluwer Academic Publishers

Brasilibathynellocaris salvadorensis

<i>BRASILIBATHYNELLOCARIS SALVADORENSIS</i> ‘FORMA LANCEOLATA’ <p> <i>Parastenocaris salvadorensis</i> f. lanceolata – Noodt (1962: 235); Rouch (1986), Dussart & Defaye (1990).</p> <p> <i>Material examined:</i> Noodt (1962) reported material from samples S 310 and S 311, which was collected from different spots at the same site; we found no material from S 310, thus observations were based on ten females from S 311.</p> <p> <i>Collecting locality:</i> El Salvador, Laguna de Ilopango near San Salvador, groundwater from sandy beach at Balneario Apulo.</p> <p> <i>Diagnosis:</i> Females of <i>B. salvadorensis</i> f. lanceolata differ from the nominotypical form only in the furca (Noodt, 1962: 236, figs 40, 41).</p> <p> <i>Description of neotenic male of</i> <i>B. salvadorensis</i> Neotenic male with five urosomites and telson. No distinct difference in shape and armature of furca. A2, legs 1 and 5 as in normally developed male. A1 (Fig. 18A) eight-segmented, as in male, but weakly geniculate; without the normal development of the fifth segment that can be seen in the male. Praecoxa of legs 2 and 4 is a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa (Fig. 18C, D; not observed for leg 3). Leg 2 (Fig. 18D) as in male, but with a row of spinules on distal inner corner of exp-2 not transformed into hair-like spinules. Leg 3 (Fig. 18B) basis with a long outer seta, a strong curved spinule, and endopod represented by a seta; exopod two-segmented; exp-1 with a strong outer spine homologous to the thumb and an inner hyaline cushion; exp-2 with a distal spine; thumb and exp-2 spine with a hyaline border. Leg 4 (Fig. 18C) with three-segmented exopod; exp-1 not transformed as in normally developed male, with the proximal invagination on proximal inner corner, without an anterior row of strong spinules; in this case, the plesiomorphic condition is expressed in the neotenic male as a distal row of spinules on distal inner corner of the segment.</p> <p> <i>Description of copepodid V of B. salvadorensis</i></p> <p>Male copepodid with four urosomites and telson. Furca with seven setae (Fig. 19A); seta II not extremely reduced. A1 seven-segmented (Fig. 19B), with aesthetascs present on segments 4 and 7. Praecoxa as a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa of legs 3 and 4 (Fig. 19C, D). Leg 3 (Fig. 19C) with lamelliform endopod; exopod two-segmented, exp-1 without inner hyaline cushion and with a distal inner tube pore, exp-2 without distal hyaline frill; basis with a long outer seta and without strong curved proximal spinule; thumb and exp-2 spines without hyaline margins; structures that appear only in the adult, such as the exp-1 hyaline cushion and the basal hook-like spinule (indicated by dark arrows) can be seen inside the copepodid V limb. Leg 4 coxa without the two anterior modified spinules (Fig. 19D); endopod lamelliform, triangular, with a transverse row of spinules inserted at the midlength of the segment and without hyaline distal margin; exp-1 without invagination on proximal inner corner, rectangular and with distal hyaline frill on inner corner; the strong row of anterior spinules of exp-1, the two modified basal spinules and the outer serrated endopod margin that appear in the adult can be seen inside the copepodid V limb and are indicated by dark arrows. Leg 5 (Fig. 19E) with an inner process, an intercoxal plate, an outer basal seta, and three setae inserted on outer margin; proximal exopodal seta adjacent to outer basal seta very reduced.</p>Published as part of <i>Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3)</i> on pages 550-551, DOI: 10.1111/j.1096-3642.2009.00574.x, <a href="http://zenodo.org/record/5438570">http://zenodo.org/record/5438570</a&gt

Brasilibathynellocaris brasilibathynellae

BRASILIBATHYNELLOCARIS BRASILIBATHYNELLAE GROUP Diagnosis: Brasilibathynellocaris with leg 2 endopod sexually dimorphic (pl), very long in male (ap) and as long as exp-1. Male leg 4 exp-1 without anterior row of strong spinules (ap). Species included: Brasilibathynellocaris brasilibathynellae; B. paranaensis comb. nov.Published as part of Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3) on page 529, DOI: 10.1111/j.1096-3642.2009.00574.x, http://zenodo.org/record/543857

Brasilibathynellocaris panamericana

BRASILIBATHYNELLOCARIS PANAMERICANA ‘FORMA TRUNCATA’ Parastenocaris panamericana f. truncata – Noodt (1962: 230); Rouch (1986), Dussart & Defaye (1990). Material examined: Specimens from sample S 114 (Noodt, 1962); from this sample, Noodt prepared 12 slides now stored at DZMB (Noodt collection, box 6, slide nos. 9–20); only slides 9–13 carry members of B. panamericana ‘f. truncata’, as follows: three males each (nos. 9, 10); four, three, and one female, respectively (nos. 11–13). Collecting locality: El Salvador, groundwater from beach of a small rocky sea bay near La Fochota (south of La Union). Diagnosis: Males of B. panamericana ‘f. truncata’ are similar to those of the nominotypical form in all characters. Females differ in the following characters: furca (Fig. 11B; see also Noodt, 1962: 229, figs 15, 16, and 232, figs 26–28) seta IV reduced to a slender spine; seta V reduced to a stout spine, with several setules arranged distally; other setae developed as in male. Leg 5 rectangular, with an inner process, an intercoxal plate, an outer basal seta, but lacking the most proximal exopodal seta, as in male Noodt (1962: 231, fig. 19).Published as part of Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3) on page 544, DOI: 10.1111/j.1096-3642.2009.00574.x, http://zenodo.org/record/543857

Brasilibathynellocaris salvadorensis

BRASILIBATHYNELLOCARIS SALVADORENSIS GROUP Diagnosis: Brasilibathynellocaris with leg 2 endopod sexually dimorphic (pl), more ornamented in male, shorter than exp- 1 in both sexes (pl). Male leg 4 exp-1 with anterior row of strong spinules (pl); endopod with a hyaline region (ap). Species included: Brasilibathynellocaris salvadorensis; B. panamericana; B. cuscatlanensis comb. nov.Published as part of Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3) on page 529, DOI: 10.1111/j.1096-3642.2009.00574.x, http://zenodo.org/record/543857

Brasilibathynellocaris panamericana

<i>BRASILIBATHYNELLOCARIS PANAMERICANA</i> (NOODT, 1962) (FIGS 11–13) <p> <i>Parastenocaris panamericana</i> Noodt – Noodt (1962: 228); Löffler (1981).</p> <p> <i>Brasilibathynellocaris panamericana</i> (Noodt) – Jakobi (1972a).</p> <p> <i>Parastenocaris panamericana panamericana</i> Noodt – Rouch (1986), Dussart & Defaye (1990).</p> <p> <i>Material examined:</i> Syntypes from sample S 176 (Noodt, 1962); from this sample, Noodt prepared four slides now stored at DZMB (Noodt collection, box 6, slide nos. 37–40), all of them carrying more than one individual and both sexes; we were unable to discern unequivocally which animal was actually drawn by Noodt. Redescription is based on dissected males on slides 38–40 and on females on slides 37, 39, and 40.</p> <p> <i>Collecting locality:</i> El Salvador, groundwater in bank of Rio Guasala (next to Jiboa river) on road between San Salvador and Zacatecoluca. Note that Noodt (1962: 228) called this locality (of sample S 176) the ‘locus typicus’, but that this did not explicitly exclude the many additional specimens he listed from other samples from his type series of <i>Parastenocaris panamericana</i> (ICZN, 1999: Art. 72.4.6). Consequently, all those specimens are syntypes of equal nomenclatural standing, and all corresponding localities together form the type locality (ICZN, 1999: Art. 76.1). <i>Description</i></p> <p> <i>Male:</i> Habitus in dorsal view and length as in Noodt (1962: 229, fig. 12). Rostrum not fused to cephalothorax, with a wide base and two sensilla on tip. Cephalothorax with dorsal integumental window, second to fifth urosomites with one dorsal integumental window each (Noodt, 1962, loc. cit.). Telson smooth (Fig. 11A); anal operculum smooth and slightly concave (Noodt, 1962: 229, fig. 2). Furca (Fig. 11A) with six visible setae and a distal pore on outer margin; setae I and III inserted proximally to the middle of furca, anterior to seta VII; seta II reduced or absent, not visible; seta IV subdistal, inserting dorsally, on outer margin of furca; setae V long (Noodt, 1962: 229, fig. 1), inserting on distal margin of furca; seta VI shorter than seta V inserting beneath it; seta VII of about same size as seta VI, socketed at basis and inserting dorsally, on inner margin of furca. A1, A2, and mouthparts as in <i>B. brasilibathynellae</i>. Praecoxa of legs 1–4 is a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa (Fig. 12A–D). Leg 1 (Fig. 12A) coxa unarmed; basis with outer seta and one pore on anterior outer margin, three spinules on outer margin, and a row of eight small spinules distally, between endopod and exopod. Endopod twosegmented; enp-1 as long as the combined length of first two exopod segments, with two outer rows of spinules and a distal row of spinules on inner margin; enp-2 with one outer spine, one geniculate seta, and a posterior hyaline frill. Exopod three-segmented, exp-1 with outer spine, exp-2 unarmed, exp-3 with two outer spines and two geniculate setae of different lengths. Leg 2 (Fig. 12B) coxa unarmed, with row of small spinules on posterior margin and row of spinules on anterior margin; basis without outer seta, with outer pore and one row of spinules on outer margin; exopod three-segmented, exp-1 with a long outer spine and a hyaline frill on distal inner corner; exp-2 without armature and with two divergent rows of long spinules arranged distally; exp-3 with three setae of different lengths, distal hyaline frill at inner corner and row of long spinules on outer distal margin; endopod one-segmented, shorter than exp-1, with a row of spinules along inner margin, one long and subdistal spinule on each side of segment, two long spinules proximally inserted on outer margin and a distal seta. Leg 3 (Fig. 12C) coxa unarmed; basis with an outer seta (broken in the illustration), an inner strong (hook-shaped) spinule on proximal portion and two rows of spinules of different sizes near insertion of endopod; endopod represented by a slender seta; exopod inwardly curved, strong, ending in a long forceps formed by long apophysis and thumb (both with a hyaline margin); proximally with a hyaline ‘cushion’ on inner margin. Leg 4 (Fig. 12D) coxa with two long and strong spinules on anterior margin; basis quadratic, with an outer seta and an outer pore; exp-1 reduced in length and with an invagination on proximal inner corner; anteriorly with a row of four long spinules; outer margin strongly ornamented and with an outer spine; exp-2 unarmed, with a transversal row of long spinules distally inserted on outer corner and a distal row of small spinules on inner corner; exp-3 with two distal setae of different lengths and two big spinules distally inserted on outer margin; endopod falciform, with a serrated lamella on outer margin and a subdistal hyaline ‘tongue’ on inner margin. Leg 5 trapezoid, with an inner process, an intercoxal plate, an outer basal seta, and two distal setae inserted on outer margin (Figs 11D, 12E); in different shape on Figure 11C because of lateral displacement of the limbs. Leg 6 is an unarmed, rounded, and asymmetrical operculum covering the genital aperture (Fig. 11C), appearing as a triangular plate in lateral view (Fig. 11D).</p> <p> <i>Female:</i> Sexually dimorphic in A1, legs 2–5, genital somite and furca. Length as in Noodt (1962). Integumental windows as in <i>B. brasilibathynellae</i>. Telson smooth, anal operculum smooth and slightly concave (Noodt, 1962: 229, fig. 1). Furca as in male, but with seven visible setae; setae I– III inserted proximally to the middle of furca, anterior to seta VII; seta II very reduced. A1 seven-segmented (Fig. 13D), not geniculate; armature beginning with proximal segment as follows: 0/4/5/2 + Ae/1/1/9 + Ae. A2 and mouthparts as in male. Praecoxa of legs 2–4 is a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa (Fig. 13A–C). Leg 1 as in male. Leg 2 (Fig. 13A) coxa unarmed, with one row of small spinules on anterior margin; basis without outer seta, with outer pore and ornamented with one row of spinules on outer margin; exopod three-segmented, exp-1 with long outer spine and with a hyaline frill on the distal inner corner, exp-2 and exp-3 as in male; endopod one-segmented, less ornamented than in male. Leg 3 (Fig. 13B) coxa unarmed, with a posterior and an anterior row of spinules; basis with a long outer seta, an outer pore, a row of spinules between outer seta and exopod, and a row of spinules before insertion of endopod; endopod represented by a short segment with a subdistal spinule; exopod twosegmented; exp-1 with an outer spine and two transversal inner rows of spinules, inserted one distally and subdistal; exp-2 with two apical setae, an hyaline frill on distal inner corner and an outer subdistal spinule. Leg 4 (Fig. 13C) coxa unarmed; basis with an outer seta, an outer pore, and a row of spinules near insertion of endopod; endopod one-segmented, longer than exp-1, with a row of transverse spinules medially inserted, probably delineating original separation between endopod and pinnate distal seta, now incorporated into segment, and two basal spinules; exopod three-segmented, exp-1 normally developed, with an outer spine and a hyaline frill on distal inner corner; exp-2 and exp-3 as in males. Leg 5 rectangular, with an inner process, an intercoxal plate, an outer basal seta and three distal exopodal setae (Noodt, 1962: 229, fig. 10). Genital field as illustrated in Figure 13E. Genital operculum formed by two lateral and unarmed plates covering the gonopores. Single medially located copulatory pore.</p>Published as part of <i>Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3)</i> on pages 539-544, DOI: 10.1111/j.1096-3642.2009.00574.x, <a href="http://zenodo.org/record/5438570">http://zenodo.org/record/5438570</a&gt

Brasilibathynellocaris salvadorensis

BRASILIBATHYNELLOCARIS SALVADORENSIS (NOODT, 1962) (FIGS 14–19) Parastenocaris salvadorensis Noodt – Noodt (1962: 233); Rouch (1986), Dussart & Defaye (1990). Brasilibathynellocaris salvadorensis (Noodt) – Jakobi (1972a). Material examined: Syntypes from sample S 175 (Noodt, 1962); from this sample, Noodt prepared nine slides now stored at DZMB (Noodt collection, box 6, slide nos. 28–36); only slides 28–33 carry members of B. salvadorensis s.s., as follows: four males (slide no. 28), one neotenic male (29), three females (30), five females (31), nine females (32), four females (33). Additional material: male copepodid V dissected and mounted on six slides (labelled SI to SVI) and deposited in DZMB (Noodt collection, box A); the exact locality of this sample is not mentioned and unknown, as the vial, which contains male and female adults and juveniles of B. salvadorensis, is labelled with the species name only. Collecting locality: El Salvador, groundwater from bank of Rio Zacatiapa, on road between San Salvador and Zacatecoluca. See note in ‘Collecting locality’ section under B. panamericana. Description Male: Length as in Noodt (1962). Rostrum not fused to cephalothorax, with a wide base and two sensilla on tip. Cephalothorax with dorsal integumental window, second to fifth urosomites with one dorsal integumental window each. Telson smooth (Fig. 14), anal operculum smooth and slightly concave (Noodt, 1962: 234, fig. 30). Furca (Fig. 14) with seven setae; setae I– III inserted proximally to the middle of furca, anterior to seta VII; seta II very reduced; seta IV subdistal, inserting dorsally, on outer margin of furca; setae V very long, inserting on distal margin of furca (Noodt, 1962: 234, fig. 30); seta VI much shorter than seta V inserting beneath it; seta VII of about same size as seta VI, socketed at basis and inserting dorsally, on inner margin of furca. A1 (Fig. 15A) eight-segmented and prehensile; armature beginning with proximal segment: 0/6/4/2/5 + Ae/3/2/9 + Ae. A2 and mouthparts as in B. brasilibathynellae. Praecoxa of legs 1–4 is a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa (Figs 15B, 16A–C). Leg 1 (Fig. 15B) coxa unarmed; basis with outer seta and one pore on anterior outer margin, three spinules on outer margin, and a row of eight small spinules distally inserted between endopod and exopod; exopod three-segmented, exp-1 with outer spine, exp-2 unarmed, exp-3 with two outer spines and two geniculate setae of different lengths; endopod two-segmented, enp-1 as long as the combined length of first two exopod segments, with two outer transversal rows of spinules and a distal longitudinal row of spinules on inner margin, enp-2 with one outer spine, one geniculate seta, and a posterior hyaline frill. Leg 2 (Fig. 16A) coxa unarmed, with one row of small spinules on anterior margin; basis without outer seta and ornamented with one longitudinal row of spinules and one pore on outer margin; exopod threesegmented, exp-1 with a long outer spine and a hyaline frill on distal inner corner; exp-2 without armature and with two divergent transversal rows of long spinules inserted distally (hair-like spinules on distal inner corner); exp-3 with three setae, distal hyaline frill at distal inner corner and row of long spinules on outer distal corner; endopod onesegmented, shorter than exp-1, with a longitudinal row of five short spinules on inner basal margin, one longitudinal row of four spinules of increasing length on inner distal margin, one apical setae, one subapical strong spinule on outer margin, and a transversal row of three long spinules at one-third of the outer margin. Leg 3 (Fig. 16B) coxa unarmed; basis with a long outer seta, an inner strong (hook-shaped) spinule on proximal portion, and two rows of spinules of different sizes near insertion of endopod; endopod represented by a slender seta; exopod inwardly curved, strong, ending in a long forceps formed by apophysis and thumb (both with a hyaline margin); proximally with a hyaline ‘cushion’. Leg 4 (Fig. 16C) coxa with two long and strong spinules on anterior side (around them we can observe a weakly chitinized zone) and a row of small spinules posteriorly inserted; basis with an outer seta, an outer pore, and a row of spinules on outer margin; exp-1 reduced in length and with an invagination on proximal inner corner, anteriorly with a row of four strong spinules; outer margin strongly ornamented and with an outer spine; exp-2 unarmed, with a distal row of long spinules on outer corner and a row of smaller spinules on distal inner corner; exp-3 with two distal setae of different length and with three big spinules on distal outer corner; endopod subtrapezoidal, quadratic on proximal margin and prolonged in an inner blunt tip with distal hyaline margin. Leg 5 trapezoidal, with an inner process, an intercoxal plate, an outer basal seta, and two distal setae (Figs 14B, 16D). Leg 6 is an unarmed, rounded, and asymmetrical operculum covering the genital aperture (Fig. 14B), appearing as a triangular plate in lateral view (Fig. 14C). Female: Sexually dimorphic in A1, legs 2–5, genital somite, and furca. Length as in Noodt (1962). Integumental windows as in B. brasilibathynellae. Telson smooth, anal operculum smooth and slightly concave (Noodt, 1962: 234, fig. 29). Furca as in male, with seven setae; setae I– III inserted proximally to the middle of furca, anterior to seta VII; setae 2 reduced or absent. A1 as in female of B. panamericana (Fig. 13D). A2 and mouthparts as in male. Praecoxa of legs 2–4 is a distinct and relatively large triangular section adjacent to the outer proximal corner of coxa (Fig. 17A–C). Leg 1 as in male. Leg 2 (Fig. 17B) coxa unarmed, with one row of small spinules on posterior margin; basis without outer seta and ornamented with one row of spinules and one pore on outer margin; exopod three-segmented, exp-1 with long outer spine and with a hyaline frill on distal inner corner, exp-2 and exp-3 as in male; endopod one-segmented, less ornamented than in male. Leg 3 (Fig. 17C) coxa unarmed; basis with an outer seta and an outer pore; endopod represented by a short segment with a subdistal spinule; exopod two-segmented; exp-1 with an outer spine and one on the distal corner; exp-2 with two setae, a hyaline frill on the distal inner corner, and two spinules on distal outer corner. Leg 4 (Fig. 17A) coxa and basis unarmed; basis with an outer seta, an outer pore and two spinules below it; endopod onesegmented, longer than exp-1, with a transverse row of spinules medially inserted, probably delineating the original separation between endopod and pinnate distal seta, now incorporated into segment; exopod three-segmented, exp-1 normally developed, with an outer spine and a hyaline frill on distal inner corner; exp-2 and exp-3 as in male. Leg 5 trapezoidal, with an inner process, an intercoxal plate, an outer basal seta, and two distal setae inserted on outer margin (Fig. 17D). Genital field as illustrated in Figure 17E. Genital operculum formed by two lateral and unarmed plates covering the gonopores. Single medially located copulatory pore.Published as part of Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3) on pages 544-547, DOI: 10.1111/j.1096-3642.2009.00574.x, http://zenodo.org/record/543857

Brasilibathynellocaris Jakobi 1972

GENUS BRASILIBATHYNELLOCARIS JAKOBI, 1972 Brasilibathynellocaris Jakobi, 1972 – Jakobi (1972a: 143). Pararemaneicaris Jakobi, 1972, syn. nov. – Jakobi (1972a: 144). Paraforficatocaris Jakobi, 1972, syn. nov. – Jakobi (1972b: 245). Type species: Brasilibathynellocaris brasilibathynellae (Jakobi & Loyola e Silva, 1962). Diagnosis: Parastenocarididae with dorsal integumental windows on cephalothorax and second to fifth urosomites of male (pl). Furca with seven setae (pl); setae I– III originating from almost same region (pl), anterior to seta VII (pl); seta II reduced in size, sometimes indiscernible (ap?). A1 eight-segmented in male (pl), seven-segmented in female (pl). Maxilla with two endites, proximal endite with one seta (pl), distal one with one spiniform and two slender setae (pl). Leg 2 endopod sexually dimorphic (pl?); long outer spine on exp-1 (ap?). Basis of male leg 3 with a strong spinule on inner margin (ap?) and a row of short and stout spinules near insertion of endopod (pl?); exopod inwardly curved, strong, ending in a long forceps formed by apophysis and outer spine of exp-1 of leg 3 (the thumb), both with a hyaline margin (ap); endopod represented by slender seta (pl). Coxa of male leg 4 with two long and strong spinules on anterior margin (ap); exp-1 reduced in length and with proximal invagination on inner corner (ap); endopod sexually dimorphic (pl). Leg 5 rectangular, with an inner process, an intercoxal plate, a basal seta, and two distal setae inserted on outer margin; no proximal exopodal seta adjacent to outer basal seta (ap?). Species groups included: Brasilibathynellocaris can be divided into two monophyletic groups (Fig. 24), which are newly proposed here:Published as part of Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, pp. 527-566 in Zoological Journal of the Linnean Society 159 (3) on page 529, DOI: 10.1111/j.1096-3642.2009.00574.x, http://zenodo.org/record/543857