Kudinopasternakia amazonica Santos, 2007, n. sp.
Creators: name: Santos, Kátia Christol Dos
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Tanaidacea
Sphyrapodidae
Kudinopasternakia
Kudinopasternakia amazonica

description: Kudinopasternakia amazonica n. sp. (Figs. 1–3)
Material examined: Holotype 1 male, MZUSP 17.920, 700m, Sta.009; Allotype female without oostegites, MZUSP 17.941, 700m, Sta.009.
Diagnosis. Rostrum rounded; pereopod 1 carpus with four, propodus with six ventral cuspidate setae; pereopod 4 propodus with one dorsodistal thick seta; pleonites with rounded epimera.
Description of male. Body (Fig.1 a, b) 4.9 mm long, semicylindrical, dorsoventrally flattened, 4.7 times as long as the cephalothorax. Rostrum slightly rounded. Eye lobes rounded, without visual elements. Cephalothorax not fused with pereonite 1, and as long as combined length of pereonites 3 to 4.
Pereon 2.4 times as long as cephalothorax; six free pereonites, pereonite 6 shortest, pereonite 4 longest. Pleon with five short and laterally rounded pleonites, pleotelson distally pointed, longer than broad. Antennule (Fig. 1 c) proximal peduncle article twice as long as broad, with unequal setae, three on inner, six on outer margin; article 2 as long as broad with two setae on inner and a single seta on outer margin.; article 3 broader than long with one seta on each margin; inner flagellum two–articled, both articles bearing one seta distally, last article with three setae terminally; outer flagellum five–articled, last article bearing three simple setae and two aesthetascs terminally.
Antenna (Fig.1 d) 10-articulate; first article tumid, with ridged surface. Second article slender and twice as long as first, pseudosquama with one long simple seta; third article short with one seta on inner margin; fourth article thinner and longer than second, with eight broom and one simple setae. Following six articles thinner, decreasing in width towards last article.
Mouth parts not dissected to avoid damage to the holotype; mandible with three–articled palp (Fig. 1 e), observed without dissection, confirming the genus.
Cheliped (Fig.2 a) basis with one short mid–ventral and one distoventral setae, exopod with four terminal plumose setae; merus with one ventral seta distally; carpus longer than merus with three long and two short ventral simple setae; fixed finger of propodus with five ventral and three dorsal simple setae; one simple seta on the articulation of the dactylus. Teeth on grasping and/or cutting edges of propodus and dactylus as figured.
Pereopod 1 (Fig.2 b) basis almost 1.6 times as long as merus; exopod not observed; ischium short, with one distoventral seta; merus ventral margin with six simple setae and one distal cuspidate setae, two setae distal dorsally. Carpus as long as merus, four cuspidate setae distoventrally, row of simple setae on dorsal margin and one cuspidate seta distodorsally. Propodus with ventral margin bearing six cuspidate setae; dorsal edge with row of simple setae, two cuspidate setae distally. Dactylus as long as propodus, with two spines on ventral margin. Carpus and propodus with some diminute rounded tubercles on basis of each cuspidate setae ventrally. Distal lobe on carpus also with these tubercles.
Pereopod 2 (Fig.3 a) basis as long as the ischium, merus and carpus combined, with three short setae ventrally; ischium with one seta ventrally; merus as long as carpus, with four setae ventrally; carpus longer than propodus, with ten setae ventrally and five dorsally; propodus as long as dactylus and unguis combined, with nine setae ventrally and six setae dorsally; dactylus and unguis smooth.
Pereopod 3 (Fig.3 b) similar to pereopod 2, basis with two setae ventrally, merus with three setae ventrally; carpus with eleven setae ventrally and dorsally naked; propodus longer than dactylus with nine ventral and four dorsal setae.
Pereopod 4 (Fig.3 c) basis with one mid–ventral broom seta; ischium as in pereopod 3; merus with one distal seta on each margin; carpus about twice length of merus with distal half bearing four spiniform setae; propodus ventral margin with four spiniform setae, two subterminal rows each with approximately six distally serrate setae; dorsal margin with one distodorsal thick seta ornamented ventrally, serrate on proximal half and with eight spines on distal half; dorsally, one simple and one broom setae on proximal half of propodus.
Pereopod 5 (Fig.3 d) basis equal to combined lengths of other segments except ischium, with one short seta on proximal half of each margin; ischium with one seta ventrally; merus with one distal seta on each margin; carpus slightly longer than propodus or merus, with nineteen spiniform setae ventral and subventrally; propodus with one broom and two simple setae distodorsally and three rows of distal serrate setae and three simple setae ventrally; dactylus and unguis as long as propodus.
Pereopod 6 (Fig.3 e) similar to pereopod 5, basis with five long broom setae on ventral and subventral margin; carpus with six ventral and two subterminal spiniform setae.
Pleopod (Fig.3 f) basal article with one plumose seta distally; endopod with one plumose seta medially and eleven unequal long plumose setae; exopod bi-articulate with article 2 bearing twelve unequal plumose setae.
Uropod (Fig. 3 g) inserted laterally, not dissected, endopod ten–articled, exopod three-articled.
Sexual dimorphism. Pereopod 1 without rounded protuberances ventrally at basis of each cuspidate seta on female.
Etymology. From the Latin, amazonica, referring to the region where the species was collected.
Type-locality: off mouth of Amazonas River, Continental slope, Brazil, 0 3° 25’S – 48° 03’W, 700 m depth.
Geographic d istribution. Only known from the type –locality.
Remarks. Kudinopasternakia amazonica n. sp. has laterally rounded pleonites as found in K. balanorostrata Kakui et al., 2007, K. bispinosa Guţu & Heard, 2002, K. siegi (Viskup & Heard, 1989) and K. brasiliensis n. sp. (see below), but differs from these species as follows: rostral shape (rounded on K. amazonica n. sp. instead of pointed); the number of cuspidate setae on propodus of pereopod 1 with K. balanorostrata with four, K. bispinosa with two, and K. brasiliensis n. sp. with three setae. Pereopod 1 of K. siegi also has five and three cuspidate setae ventrally on propodus and carpus, respectively, while K. amazonica n. sp. bears five setae (female) or six (male) on the propodus along with four on the carpus (both sexes).
description: Published as part of Santos, Kátia Christol Dos, 2007, Three new species of Kudinopasternakia Guţu, 1991 (Crustacea: Tanaidacea: Sphyrapodidae) from Brazilian waters, pp. 23-41 in Zootaxa 1666 on pages 25-28, DOI: 10.5281/zenodo.180102