Kalliapseudes longisetosus, Drumm, David T., 2007

Drumm, David T., 2007, Two new species of Tanaidacea of the genus Kalliapseudes Stebbing, 1910 (Crustacea: Apseudomorpha: Kalliapseudidae) from Australia, Zootaxa 1441, pp. 1-19 : 2-8

publication ID	https://doi.org/ 10.5281/zenodo.176001
DOI	https://doi.org/10.5281/zenodo.5679655
persistent identifier	https://treatment.plazi.org/id/03B3072A-F656-FFEF-FF3E-88CAFB4F1624
treatment provided by	Plazi
scientific name	Kalliapseudes longisetosus
status	sp. nov.

Treatment

Kalliapseudes longisetosus View in CoL , new species

Figs. 1–6 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6

Material examined. Holotype: ovigerous female, AM P71872, Malabar, Sydney, New South Wales, Australia, depth unknown, 33°58'S, 151°16'E, EPA- Malabar Deep Ocean Outfall Study ( DOOM). Allotype: adult male (partly dissected), AM P73643, Bass Point, New South Wales, Australia, 40 m depth, 34°36'S, 150°54'E, 1 Feb 1990. Paratypes: one ovigerous female (partly dissected), AM P71870, east of Malabar, Sydney, New South Wales, Australia, 83.70 m depth, 33°59'11"S, 151°17'54"E, Malabar Deep Ocean Outfall Study ( DOOM), 18 Jan 1996, R1; one juvenile, AM P71871, same locality as holotype; one juvenile, AM P40497, same locality and collection date as allotype; one juvenile, AM P40500, same locality and collection date as allotype, 45 m depth; ten juveniles and five mancas, AM P40493, same locality and collection date as allotype.

Description. Ovigerous female. Body (holotype, Fig. 1 View FIGURE 1 A): length 5.4 mm, 5.4 times as long as broad.

Carapace ( Fig. 1 View FIGURE 1 A). Broader than long, one pair of mid-lateral setae; rostrum round.

Pereonites ( Fig. 1 View FIGURE 1 A). Pereonites 4 and 5 longer than 1–3, 6 and pereonites 1 and 6 shorter than 2–5, all rounded laterally; one pair of longer than usual setae on anterior corners (about as long as first pereonite); hyposphaenia present on all pereonites.

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 present on all pleonites. Pleotelson more than ½ length of combined length of pleonites 1–5, rounded, narrowing posteriorly to a rounded tip, with several lateral simple setae and two pairs of simple setae on dorsal surface.

Antennule ( Fig. 1 View FIGURE 1 B). First article about 2.5 times as long as second and third articles combined and about 2.5 times as long as maximum width; inner flagellum with three articles; outer flagellum with nine articles; with one aesthetasc on each of articles 4, 5, and 7; three terminal simple setae.

Antennae ( Fig. 1 View FIGURE 1 C). First article with medial extension bearing five plumose setae. Second article with minute scales on dorsal surface. Squama with six long simple setae. Distal (4th) peduncle article longer than flagellum, with double row of plumose setae. Flagellum with six articles; distal article with five terminal simple setae.

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

Mandibles. Right mandible ( Fig. 1 View FIGURE 1 E) with incisor process having two denticles. Left mandible ( Fig. 1 View FIGURE 1 F) with incisor process having eight to ten denticles; lacinia mobilis with six denticles. Both mandibles with setal row of five serrate spiniform setae. Mandibular palp uniarticulate with row of long plumose setae and terminating in a sharp spine. Molar processes as illustrated ( Figs. 1 View FIGURE 1 E, G).

Labium ( Fig. 1 View FIGURE 1 H). Palp with long hairs on margins and spinulate on outer proximal margin; ending in an acuminate inner tip.

Maxillule. Inner endite ( Fig. 1 View FIGURE 1 J) bearing four terminally setulate setae. Outer endite ( Fig. 1 View FIGURE 1 I) with eleven distal spines, one short subterminal spine, and two subterminal setae and with long hairs on outer face.

Maxilla ( Fig. 2 View FIGURE 2 A). Inner lobe of fixed endite with posterior row of four serrate setae. Outer lobe of fixed endite ( Fig. 2 View FIGURE 2 B) with four multi-toothed spiniform setae on inner half and several serrate and simple setae on outer half. Inner lobe of moveable endite with spiniform setae terminating in three cusps. Outer lobe of moveable endite with two serrate and two plumodenticulate setae. Outer margin with dense rows of long hairs.

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

Cheliped ( Figs. 2 View FIGURE 2 E, F). Basis with three long simple setae on ventral margin and one short simple seta on ventrodistal corner. Merus longer than broad, with three simple setae on ventrodistal corner. Carpus about four times as long as broad, with double row of long, plumose setae ventrally and one short simple seta on dorsodistal corner. Propodus with diagonal row of long, plumose setae; fixed finger two-thirds or more length of dactylus, with several simple setae just proximal to distal spine; cutting edge with numerous spinules; palm with several simple setae. Dactylus with three simple setae adjacent to claw and with three simple setae midway on inner surface; cutting edge with several setae increasing in length distally, interspersed with a few spinules; claw present. Exopodite present, with two plumose distal setae.

Pereopod 1 ( Fig. 2 View FIGURE 2 G). Basis almost three times as long as broad, with several long simple setae on ventrodistal margin. Ischium with one simple seta on ventral margin. Merus longer than broad, broader than basis, with one dorsal and one ventral serrate spiniform seta and with several simple setae on ventral margin. Carpus about one-third length of merus, with two ventrodistal and one dorsodistal serrate spiniform setae. Propodus shorter than carpus, with six ventral and two dorsal serrate spiniform setae. Dactylus represented by a sensory organ, about as long as propodus, with several long, terminal sensory setae and numerous short sensory setae and with one seta on inner surface; unguis absent. Exopodite present, with 2 plumose distal setae.

Pereopod 2 ( Figs. 3 View FIGURE 3 A–C). Basis almost three times as long as broad, with four very long simple setae (almost as long as basis) on ventral margin. Ischium with one longer and one shorter simple setae on ventrodistal margin. Merus about same length as carpus, with one serrate spiniform seta on ventral margin. Carpus about 1.8 times as long as broad, with three serrate spiniform setae on ventral margin and two serrate spiniform setae on distal outer surface. Propodus about one-third length of basis, with two ventral and three distal serrate spiniform setae, and with three spiniform setae on outer surface. Dactylus shorter than basis; sensory organ present near base, with six aesthetascs; with short needle-like tip; unguis fused with dactylus.

Pereopod 3 ( Fig. 3 View FIGURE 3 D). Similar to pereopod 2, but basis with five very long simple setae. Carpus with three serrate spiniform setae on ventral margin, one spiniform seta on inner surface, one spiniform seta on ventrodistal corner, and two serrate spiniform setae on outer surface.

Pereopod 4 ( Figs. 3 View FIGURE 3 E, F). Basis about 3.5 times as long as broad, with a few distal simple setae. Ischium with one long and two short simple setae on ventrodistal corner. Merus shorter than carpus, with one spiniform seta distally on outer and inner surfaces and with several simple setae distally. Carpus with five spiniform setae on outer and inner surfaces. Propodus with 16 serrate spiniform setae increasing in length distally and terminally with several short, bipinnate setae. Dactylus shorter than propodus, with a tuft of terminal aesthetascs; unguis absent.

Pereopod 5 ( Fig. 3 View FIGURE 3 G). Similar to pereopod 4. Basis broader than that of pereopod 4, about 2.7 times as long as broad. Carpus with five spiniform setae on inner surface and six spiniform setae on outer surface. Propodus lacking terminal short bipinnate setae.

Pereopod 6 ( Figs. 4 View FIGURE 4 A, B). Basis with five plumose setae on dorsal margin and with four plumose and three simple setae on ventral margin. Ischium with several simple setae on ventral margin. Merus with one plumose and one simple seta on dorsal margin and several simple setae on ventral margin. Carpus with eleven simple setae on ventral margin and six simple setae distally on outer surface. Propodus with three long spiniform setae and 28 short bipinnate setae. Dactylus longer than propodus, with one distal seta; unguis small.

Pleopods ( Fig. 4 View FIGURE 4 C). Basal article with four plumose dorsal setae, ventral margin naked. Exopodite with 23 plumose setae. Endopodite with 22 plumose setae.

Uropods ( Fig. 4 View FIGURE 4 D). Basal article with one simple outer distal seta. Exopodite with three articles, distal article with four simple setae. Endopodite multiarticulated (exact number difficult to determine due to incomplete fusion in some of the articles).

Adult male (allotype). Similar to female but with the following major differences: Body ( Fig. 5 View FIGURE 5 A) length approximately 8.5 mm.

Antennule ( Fig. 5 View FIGURE 5 B). First article about 2.5 times as long as maximum width; inner

flagellum with four articles and outer flagellum with ten articles. Outer flagellum with numerous aesthetascs on articles 1–6, and one aesthetasc on article 7.

Antennae ( Fig. 5 View FIGURE 5 C). Peduncle with five articles (3rd and 4th articles not fused).

Cheliped ( Fig. 5 View FIGURE 5 D). (Propodus and dactylus broken off). Basis and carpus much more robust. Basis very globular, about as long as broad, with one spiniform seta on outer surface.

Pereopod 1 ( Figs. 5 View FIGURE 5 E, F). Basis about 2.3 times as long as broad, with one distal spiniform seta. Ischium smooth. Propodus with only four spiniform setae on ventral margin.

Pereopod 2 ( Fig. 5 View FIGURE 5 G). Carpus with five spiniform setae on ventral margin and three spiniform setae on outer surface. Propodus with four spiniform setae on ventral margin.

Pereopod 3 ( Fig. 6 View FIGURE 6 A). Carpus with six spiniform setae on ventral margin and three spiniform setae on outer surface. Propodus with four spiniform setae on ventral margin.

Peropod 4 ( Figs. 6 View FIGURE 6 B, C). Basis robust, about two times as long as broad. Merus with two spiniform setae distally on ventral margin and two spiniform setae on outer surface. Carpus with two spiniform setae on ventral margin, eight spiniform setae on outer surface, and four spiniform setae on inner surface. Pereopod 5 ( Figs. 6 View FIGURE 6 D, E). Carpus with nine spiniform setae on outer surface and seven spiniform setae on inner surface.

Pereopod 6 ( Fig. 6 View FIGURE 6 F). Basis with seven plumose setae on dorsal margin and three plumose setae on ventral margin. Merus with three plumose setae on dorsal margin. Propodus with six spiniform setae.

Etymology. Alluding to the long simple setae on the anterior corners of the pereonites and basis of pereopods 2 and 3.

Remarks. Kalliapseudes longisetosus , n. sp occurs in the same general coastal region as K. obtusifrons and, although these two species are somewhat similar K. longisetosus is distinguished from K. obtusifrons by the following characters: 1) the nature of the terminal spine of the mandibular palp (naked and not as long and narrow as in K. obtusifrons ), 2) the armature of the chelae (more irregular spinulation on the cutting edges), and 3) the setation of the dactylus of pereopod 6 (only one distal seta). The new species differs from all other known species of Kalliapseudes by having very long setae on the anterior corners of the pereonites (about as long as the first pereonite) and the basis of the second and third pereopods (almost as long as basis), and by having a needle-like tip on the dactylus of pereopods 2 and 3 ( Drumm and Heard, 2006a).