Transkalliapseudes spinulata, Drumm, David T. & Heard, Richard W., 2006

Drumm, David T. & Heard, Richard W., 2006, Transkalliapseudes spinulata, new genus, new species (Crustacea: Tanaidacea: Kalliapseudidae) from the northwest Australian shelf, Zootaxa 1298, pp. 17-27 : 20-26

publication ID	https://doi.org/ 10.5281/zenodo.173585
DOI	https://doi.org/10.5281/zenodo.5680641
persistent identifier	https://treatment.plazi.org/id/03AB5722-F745-631E-8430-FD73FC25FBF5
treatment provided by	Plazi
scientific name	Transkalliapseudes spinulata
status	sp. nov.

Treatment

Transkalliapseudes spinulata View in CoL , new species

Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4

Material examined. Holotype: adult male, AM P56734, Northwest Shelf, Western Australia, 82 m depth, 19o5.2'S, 118o57.6'E, CSIRO on RV “Soela”, 14 February 1983. Paratype: 1 adult male, AM P52195, Northwest Shelf, Western Australia, 44 m depth, 19°56.4’S, 117°53.9’E, CSIRO on RV “Soela”, 25 June 1983.

Description. Holotype male. Body ( Fig 1 View FIGURE 1 A): length 3.7 mm, 4.8 times longer than broad.

Carapace ( Fig. 1 View FIGURE 1 A). Broader than long, 1 pair midlateral setae; rostrum round.

Pereonites ( Fig. 1 View FIGURE 1 A). 4 and 5 longer than 1–3, 6, rounded laterally; with 2 pairs of setae on dorsal surface; hyposphaenia (fig. 1B) present, shaped as a small round protuberance with a short distal spine on pereonite I and as a long spine on pereonites II–V. Pereonite VI with a genital cone (fig. 4C).

Pleon ( Fig. 1 View FIGURE 1 A). Pleonites subequal; rounded epimera, with several plumose setae and 2 pairs of simple setae on dorsal surface; hyposphaenia (fig. 1C) present, shaped as a long spine on pleonite I and as a round protuberance with a short distal spine on pleonites II–V. Pleotelson about ½ length of combined length of pleonites 1–5, rounded, narrowing posteriorly to a bifurcated tip; with several lateral simple setae, several simple setae on dorsal surface, and 2 long plumose setae on either side of tip.

Antennule ( Fig. 1 View FIGURE 1 D). First article about 2.5 times as long as second and third articles combined and about 3.5 times longer than maximum width; inner flagellum with 3 articles and outer flagellum with 8 articles, with numerous aesthetascs; 3 terminal simple setae.

Antennae ( Fig. 1 View FIGURE 1 E). Article 1 with medial extension, bearing 4 plumose setae. Squama with 4 long simple setae. Last peduncle article longer than flagellum, with double row of plumose setae. Flagellum with six articles; last article with 4 terminal simple setae.

Labrum ( Fig. 1 View FIGURE 1 F). Rounded, with apex provided with hairs.

Mandibles. Right mandible ( Fig. 1 View FIGURE 1 G) with incisor process having 6 denticles. Left mandible ( Fig. 1 View FIGURE 1 H) with incisor process having 9 or 10 denticles; lacinia mobilis with 8 denticles. Both mandibles with spine row of 5 serrate spines. Mandibular palp uniarticulate with row of long plumose setae and terminating in a spine; terminal spine about 2 times longer than wide. Molar processes as illustrated ( Figs. 1 View FIGURE 1 G, I).

Labium ( Fig. 1 View FIGURE 1 J). Outer and distal margin spinulate. Palp with long hairs on margins and spinulate on outer margin. Quadrangular and ending in a long, acuminate inner tip.

Maxillule ( Fig. 1 View FIGURE 1 K). Inner endite bearing 4 terminally setulate setae. Outer endite with 11 distal spines, 2 subterminal setae and long hairs on outer face.

Maxilla ( Fig. 2 View FIGURE 2 A). Inner lobe of fixed endite with posterior row of 2 serrate setae and with long row of plumose setae. Outer lobe of fixed endite ( Fig. 2 View FIGURE 2 C) with multitoothed spiniform setae on inner half and several serrate setae on outer half. Inner lobe of moveable endite ( Fig. 2 View FIGURE 2 B) with about 9 spiniform setae terminating in 3 cusps and with 1 plumodenticulate and 1 serrate seta. Outer lobe of moveable endite with 3 serrate and 2 plumodenticulate setae. Outer margin spinulate.

Maxilliped ( Fig. 2 View FIGURE 2 D). Basal article fringed with plumose setae along outer margin. Palp with double row of long plumose setae on inner margin. Endite with numerous long hairs on lateral margins and with plumose setae on distal margin, and with 2 coupling hooks.

Epignath. Not recovered.

Cheliped ( Figs. 2 View FIGURE 2 E, F). Basis with 1 simple ventrodistal seta and ventral margin spinulate. Merus longer than broad, with 1 simple ventrodistal seta. Carpus about 2.5 times longer than broad, with double row of long, plumose setae and 1 short simple seta on dorsodistal corner. Propodus robust and ventral margin greatly rounded proximally, with diagonal row of long, plumose setae and with small, rounded tubercles at midregion; fixed finger twothirds or more length of dactylus, with several simple setae on outer surface, with distal spine; cutting edge with 1 large tooth and with 5 spinules and 2 simple setae between tooth and distal spine; palm with 1 simple seta on inner surface and several simple setae on outer surface and with 1 large tooth. Dactylus outer surface with 3 setae proximal to claw and with 1 simple seta adjacent to claw; cutting edge with triangular protuberance about midway and with about 11 spinules increasing in length distal to triangular projection; claw present. Exopodite absent.

Pereopod I ( Figs. 2 View FIGURE 2 G, H). Basis almost 3 times longer than wide, with 1 ventrodistal spine and with spinules on dorsal margin. Ischium with 1 simple seta on ventral margin. Merus longer than wide, wider and shorter than basis, with 1 dorsal and 1 ventral spine. Carpus about onethird length of merus, with 2 ventrodistal and 1 dorsodistal spine and with round tubercles on outer surface. Propodus shorter than carpus, with 3 ventral, 1 ventrodistal, and 2 dorsodistal serrate spines and with round tubercles on outer surface. Dactylus represented by a sensory organ. Exopodite absent.

Pereopod II ( Fig. 3 View FIGURE 3 A). Basis about 3 times longer than wide, with spinules on dorsal margin and 2 short, simple setae on ventral margin. Ischium with 2 short, simple setae on ventral margin. Merus about same length as carpus, with one spine on distal inner surface. Carpus about 1.5 times longer than wide, with 2 spines on ventral margin, 1 distal spine on inner surface and 1 distal spine on outer surface. Propodus about onethird length of basis, ventral and dorsodistal margins with 2 serrate spines, ventrodistal spine with 2 terminal setae, and ventral margin and outer surface with spinules. Dactylus shorter than basis; sensory organ present near base, with 3 aesthetascs.

Pereopod III ( Fig. 3 View FIGURE 3 B). Similar to pereopod II. Basis with 1 short and 1 long, simple seta on ventral margin. Ischium with 1 short, simple seta on ventral margin. Carpus with 2 distal spines on outer surface.

Pereopod IV ( Figs. 3 View FIGURE 3 C, D). Basis about 2.3 times longer than wide, with spinules on dorsal and ventral margins, 2 short simple setae on ventrodistal corner and 1 simple seta on dorsal margin. Ischium with 1 long simple seta on ventral margin and 1 short simple seta on outer surface. Merus shorter than carpus, with 1 ventrodistal spine and 2 spines on outer surface. Carpus with 4 spines on inner surface, 7 spines on outer surface and 1 distal spine. Propodus terminating in spines increasing in length distally and terminally with 5 short, comblike spines. Dactylus shorter than propodus, with 2 distal sensory setae.

Propodus of female cheliped slender (longer than yes no no carpus)

Sexually dimorphic chelipeds present present present

Exopodite on pereopod I absent absent present

Digitiform lobe on dactylus of pereopods II and III present absent present

Tuft of sensory setae on dactylus of pereopods IV present present Present or and V absent

Tuft of sensory setae on dactylus of pereopod VI absent absent absent

continued.

Pereopod V ( Figs. 3 View FIGURE 3 E, F). Basis narrower than pereopod IV, about 2.6 times longer than wide and with spinules on dorsal and ventral margins. Ischium with 1 simple seta on inner surface near ventral margin. Merus with 1 spine on inner surface. Carpus with 1 proximal and 4 distal serrate spines and with spinules on ventral margin. Propodus with 6 serrate spines increasing in length distally. Dactylus shorter than propodus, with 2 distal sensory setae.

Pereopod VI ( Fig. 3 View FIGURE 3 G). Basis with 6 long, plumose setae and spinules on dorsal margin and with 4 plumose and 1 simple setae on outer surface. Merus with 1 plumose seta on dorsal margin and 2 simple setae on ventral margin. Carpus with 4 plumose setae on dorsal margin and 5 simple setae on ventral margin. Propodus with 4 long spines and 17 short comblike spines. Dactylus shorter than basis, with 1 distal seta.

Pleopods ( Fig. 4 View FIGURE 4 A). Basal article with 2 plumose setae. Exopodite with 14 plumose setae. Endopodite with 13 plumose setae.

Uropods ( Fig. 4 View FIGURE 4 B). Exopodite with 3 articles, last article with 4 simple setae. Endopodite multiarticulated (exact number difficult to determine due to incomplete fusion in some of the articles).

Etymology. Named in reference to the numerous spinules on the appendages.

Remarks. Transkalliapseudes spinulata superficially resembles Kalliapseudes struthi Bamber, 2005 , which is known from Esperance Bay, Southwest Australia, by the similar shape and setation of the pereopods IV and V dactylus. It can be distinguished from K. struthi by the following characters: 1) the armature of the male cheliped, 2) lack of exopodites on cheliped and pereopod I, 3) 1 distal seta on pereopod VI dactylus (tip of dactylus bifurcate in K. struthi ) and 4) uropodal exopodite with 3 articles (only 2 articles in K. struthi ). As mentioned above, T. spinulata differs from all other known kalliapseudids by having numerous granularlike spinules covering the appendages. This is the first kalliapseudid reported from the Northwest Australian Shelf.