Kudinopasternakia brasiliensis, Santos, Kátia Christol Dos, 2007

Santos, Kátia Christol Dos, 2007, Three new species of Kudinopasternakia Guţu, 1991 (Crustacea: Tanaidacea: Sphyrapodidae) from Brazilian waters, Zootaxa 1666, pp. 23-41 : 29-33

Kudinopasternakia brasiliensis n. sp.

(Figs. 4–6)

Material examined: 1 female with eggs, Holotype, MZUSP 17.922, 318 m, Sta. 0402; female without oostegites; 2 manca, MZUSP 17.921, 322 m, Sta. 037; 1 female with eggs, MZUSP 17.923, 311 m, Sta. 043; 1 female without oostegites, MZUSP 17.924, 311 m, Sta. 044; 1 preparatory female, MZUSP 17.925, 334 m, Sta. 045; 2 female without oostegites, MZUSP 17.926, 315 m, Sta. 051; 1 female without oostegites (dissected), MZUSP 17.936, 400 m, Sta. 174; 1 female with empty marsupium, MZUSP 17.937, 400 m, Sta. 175; 1 female with embryos, MZUSP 17.938, 311 m, Sta. 0 27.

Diagnosis. Rostrum pointed; pereopod 1 carpus and propodus with two ventral cuspidate seate each; pleonites epimera rounded.

Description of female. Body (Fig.4a, b) 3.4 mm long, semicylindrical, dorsoventrally flattened, 4.6 times as long as the width of cephalothorax. Rostrum pointed. Ocular lobes present, without visual elements. Cephalothorax not fused with pereonite 1, as long as pereonites 3 and 4 or 4 and 5 together.

Pereon 2.4 times as long as cephalothorax; six free pereonites, pereonite 6 shortest, pereonite 4 longest.

Pleon five laterally rounded pleonites bearing small setae, pleotelson longer than wide.

Antennule (Fig.4c) article 1 3.5 times as long as broad, with three setae on each margin; article 2 1.5 times as long as broad with two simple setae on each margin and two broom setae distally on outer margin; article 3 broader than long with one seta on each margin distally; inner flagellum bi–articulate, last article bearing three setae terminally; outer flagellum four–articulate, not including common article, last article bearing five setae and aesthetacs terminally.

Antenna (Fig.4d) 9-articulate; first article tumid, with part of surface ridged. Second article slender and twice as long as the first, pseudosquama with one long simple seta; third article short and naked; fourth article thinner and longer than the second, with six broom and three simple setae. Following articles thinner, decreasing in width towards the last article. Article 5 naked, articles 6 to 8 bearing two setae distally, article 9 with three terminal setae.

Labrum (Fig.4e) with setules on both margins.

Mandible (left) lacinia mobilis (Fig. 4g) with four prominent teeth, palp (Fig.4f) tri-articulate; article 2 with one pectinate seta; article 3 with two rows of distally pectinate setae plus one longer distally; right incisor (Fig.4h) smooth.

Labium not recovered.

Maxillule (Fig. 4i) outer endite with eleven terminal and two subterminal spiniform setae; inner endite with four pinnate setae; with setules on outer margin of both endites; palp having distal article armed with one terminal and two shorter subterminal “harpoon-tipped” setae.

Maxilla (Fig.4j) Fixed endite inner lobe armed with a row of curved simple setae; outer lobe with four simple, one furcated and two tri-furcate setae; movable endite inner lobe with five, outer with four basally– inflated setae.

Maxilliped ( Fig.5 a) coxa damaged, basis with seven simple spinules on lateral margin; endite ( Fig.5 b) with two couplers, 6 plumose setae on inner margin, four circumplumose setae subterminal, four simple setae terminally; palp 4–articulate, article 1 as long as broad with one simple seta on each margin; article 2 with one seta on outer ten setae on inner margin; article 3 with four basally–inflated and two simple setae on inner margin; article 4 with seven basally–inflated setae on inner margin.

Epignath ( Fig.5 c) body rounded and naked.

Cheliped ( Fig.5 d) basis with two short setae ventrally, exopod three-articled with four terminal plumose setae; merus with one ventral seta distally; carpus longer than merus with four ventral setae and one seta dorsally; fixed finger of propodus with three ventral and three dorsal setae; one seta at the articulation of the dactylus; dactylus naked. Teeth on grasping and/or cutting edges of propodus and dactylus as figured.

FIGURE Kudinopasternakia brasiliensis MZUSP17.936 Female (3.4 mm) (a) dorsal view, (b) lateral view, (c) antennule, (d) antenna, (e) labrum; mandible (f) palp, (g) left mandible, distal, (h) right mandible, distal; (i) maxillule, (j) maxilla.

Pereopod 1 ( Fig.5 e) basis almost 1.8 times as long as merus, with one proximodorsal broom seta and one short simple distoventral seta; exopod with four terminal setae; ischium with one distoventral seta; ventral margin of the merus with four simple and one distal cuspidate setae. Carpus 0.8 times as long as merus, with two cuspidate setae distoventrally, and row of seven simple setae on dorsal margin and one cuspidate setae distodorsally. Propodus with ventral margin bearing three cuspidate setae; dorsal edge with five simple setae and two cuspidate setae distally. Dactylus shorter than propodus, with two spines on ventral margin. Ventral margin of carpus and propodus stepped at insertion of cuspidate setae.

Pereopod 2 ( Fig.5 f) basis shorter than merus, carpus and propodus combined, with two broom setae on dorsal margin; ischium with one ventral seta; merus with three distoventral and one distodorsal setae; carpus and propodus with six ventral and three dorsal spiniform setae; dactylusand propodus of equal length.

Pereopod 3 ( Fig. 5 g) similar to pereopod 2. Basis as long as merus, carpus and propodus combined, with a single broom seta at mid dorsal margin, one short distoventral seta; merus with one spiniform distoventral seta and one short distodorsal seta; carpus with six ventral and four dorsal spiniform setae; propodus with five spiniform setae ventrally, two subterminally and one distodorsally; dactylus plus unguis longer than propodus, with one small ventrodistal seta near unguis.

Pereopod 4 ( Fig.6 a) basis about as long as merus, carpus and propodus combined, with two broom setae on proximodorsal half; ischium as in pereopod 3; merus with two distovental setae; carpus longer than merus or propodus, with two ventral, three subterminal, and one distodorsal spiniform setae; propodus with one broom seta mid-dorsally, three spiniform setae ventrally and two rows of unequal setae, subterminal row with six distally half–serrate setae and terminal row with nine setiform setae; dactylus plus unguis shorter than propodus.

Pereopod 5 ( Fig.6 b) basis naked, slightly longer than merus, carpus and propodus combined; ischium and merus with one seta distoventrally; carpus with three ventral, two subventral and one distodorsal spiniform setae; propodus with three rows of distal serrate setae, three distoventral spiniform setae, two dorsal and one subterminal setae; dactylus plus unguis same length as propodus, with one ventrodistal seta near unguis.

Pereopod 6 ( Fig.6 c) similar to pereopod 5, differing in setation. Basis shorter than the length of merus, carpus and propodus combined, with six broom setae on ventral margin; merus with one distal seta on both margins; carpus with two ventral, two subventral, and one distodorsal spiniform setae; propodus with undefined rows of distal serrate setae, one distal spiniform seta on each margin and one subterminal seta; dactylus plus unguis shorter than propodus.

Pleopod ( Fig.6 d) basal article with one plumose seta distally; endopod with one plumose seta medially, eight unequal long plumose setae and one plumose on inner side; exopod bi-articulate, article 1 with one and article 2 with eight unequal plumose setae.

Uropod ( Fig.6 e) basis 2.5 as long as wide, with one simple seta on outer margin; exopod tri-articulate, one simple seta distally; endopod composed of eleven articles (broken on dissected example)

Sexual dimorphism. Male not known.

Other stages. Manca with 6–articled exopods found on pereopods 4 and 5, first article longest ( Fig.6 f).

Etymology. From the Latin, brasiliensis , referring to the collection locality.

Type-locality: Campos Basin, 22° 08’ S – 39° 59’ W, 318m.

Geographic d istribution. BRASIL, Rio de Janeiro, 311 to 400m depth.

Remarks. Kudinopasternakia brasiliensis n. sp. is distinguishable from K. dispar , K. larisae and K. trispinosa n. sp. by the shape of the pleonites being rounded laterally. The new species differs from K. siegi by the setation of the propodus of pereopod 1 and of the third article of the mandible palp, along with the setation of movable and fixed finger of the chela.

Kudinopasternakia brasiliensis n. sp. differs from K. amazonica n. sp. mainly by the pereopod 1 propodus setation, and the absence of a thick distodorsal seta on the propodus of pereopod 4. The ornamentation of pereopod 1 also is distinct on K. balanorostrata and has one or more cuspidate setae ventrally on the carpus and propodus while K. bispinosa has only two cuspidate setae ventrally on the propodus.

Figures

FIGURE 5. Kudinopasternakia brasiliensis n. sp. MZUSP 17.936 Female (3.4 mm) (a) maxilliped, (b) endite of maxilliped, (c) epignath, (d) cheliped, (e) pereopod 1, (d) pereopod 2, (e) pereopod 3.

FIGURE 6. Kudinopasternakia brasiliensis n. sp. MZUSP 17.936 Female (3.4 mm) (a) pereopod 4, (b) pereopod 5, (c) pereopod 6, (d) pleopod, (e) uropod. Manca (f) exopods of pereopods 4 and 5 enlarged.