Kalliapseudes quadrirobustirostris, Drumm & Heard, 2011

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 113-117

Kalliapseudes quadrirobustirostris n.sp.

( Figs 73–75 )

Material examined. Holotype: adult male, partly dissected ( MV J15682 ), Australia, Queensland, Northeast of Townsville, 18°24'S, 146°39'E; paratype: 1 manca ( MV J15683 ), Australia, Queensland, Britomart Reef , 18°17'S, 146°38'E.

Diagnosis (male). Rostrum square, as long as broad. Pleotelson with several posterior simple setae and with bifid tip. Antennule with accessory flagellum of six articles, proximal articles of main flagellum with dense clusters of aesthetascs decreasing in number distally, and first peduncle article without ventral spiniform setae. Antenna third peduncle article with two plumose setae on inner margin; flagellum with six articles, the first five with several pectinate setae on outer margin. Labrum without cusps. Terminal spiniform seta of mandibular palp approximately eight times as long as broad. Cutting edge of cheliped fixed finger with large proximal tooth, approximately three times as long as broad. Cheliped and pereopod 1 exopodite with three plumose setae (two large and one short). Pereopod 5 propodus with one short bipinnate seta on inner surface and none on outer surface. Pereopod 6 dactylus with one subterminal seta. Uropod article with three articles, last article approximately 3.5 times as long as second article.

Etymology. Named after the pronounced square rostrum.

Description. Adult male. Body ( Fig. 73A ): length approximately 5.2 mm, 4.5 times as long as broad.

Carapace ( Fig. 73A ). Broader than long, one pair of mid–lateral setae and two pairs of shorter dorsal setae; rostrum square, very pronounced and as long as broad.

Pereonites ( Fig. 73A ). Pereonites 4 and 5 longer than 1–3, 6 and pereonite 6 shorter than the others, all rounded laterally; at least one pair of anterolateral and dorsal setae; hyposphaenia present on all pereonites.

Pleon ( Fig. 73A ). 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 bifid tip, with several lateral and posterior simple setae and two pairs of simple setae on dorsal surface.

Antennule ( Fig. 73B ). First peduncle article approximately 2.4 times as long as second and third articles combined and approximately 2.7 times as long as maximum width, with some simple setae on inner margin and several simple and broom setae on outer margin. Second peduncle article approximately 3.5 times shorter than first article, with several simple and broom setae. Third and fourth peduncle articles very short and subequal. Outer flagellum approximately same length as peduncle, with 11 articles, the proximal articles with dense cluster of ventral aesthetascs decreasing in number distally. Inner flagellum with six articles, last article with three terminal simple setae and one broom seta.

Antenna ( Fig. 73C ). First peduncle article with one simple seta on outer distal corner and medial extension of plumose setae. Flagellum with six articles, first five articles with several pectinate setae and one or two plumose setae, distal article with four terminal simple setae and one plumose seta.

Labrum not illustrated.

Mandibles. Palp with terminal spiniform seta ( Fig. 73D ), approximately 8.4 times as long as broad.

Labium ( Fig. 73E ). Palp with long hair–like setae on margins; ending in acuminate inner tip.

Maxillule, maxilla and maxilliped not examined. times as long as broad, with double row of long, plumose setae ventrally and several short simple setae on dorsal margin and dorsodistal corner. Propodus robust with diagonal row of long, plumose setae on inner face; fixed finger with several simple setae just proximal to distal spine; cutting edge with one large proximal tooth and several short spinules interspersed with round protuberances between the tooth and distal unguis; palm with several simple setae and middistal tooth. Dactylus with three simple setae on outer surface and with three simple setae midway on inner surface; cutting edge with several setae increasing in length distally and one small proximal tooth; unguis present. Exopodite present (broken off).

Pereopod 1 (Fig. 74A). Basis broad, approximately 2.4 times as long as broad, with one ventrodistal spiniform seta and several dorsal short simple setae. Ischium with one simple seta on ventral margin. Merus longer than broad, shorter than and not as broad as basis, with several simple setae distally and on ventral margin, and one spiniform seta on each distal corner. Carpus approximately 2.5 times shorter than merus, with several simple setae and two ventrodistal and one dorsodistal serrate spiniform setae. Propodus shorter than carpus, with several simple setae and four ventral and two dorsal serrate spiniform setae. Dactylus represented by a sensory organ, as long as propodus, with several long, terminal sensory setae with two setae on inner surface; unguis absent. Exopodite present, with three plumose distal setae (two long and one short).

Pereopod 2 (Figs. 74B, C). Basis approximately 3.6 times as long as broad, with several short simple setae on ventral and dorsal margin, two broom setae on dorsal margin (broken off), one long simple seta on outer surface, and one ventrodistal spiniform seta. Ischium with four simple setae on ventrodistal margin. Merus approximately same length as carpus, with one spiniform seta on ventrodistal corner and several distal simple setae. Carpus approximately 1.6 times as long as broad, with several distal simple setae, four serrate spiniform setae on ventral margin and two serrate spiniform setae on distal outer surface. Propodus approximately 2.5 times shorter than basis, with several distal simple setae, one middorsal broom seta, five ventral and one dorsodistal serrate spiniform

Pereopod 3 (Fig. 74D). Similar to pereopod 2. Carpus with five serrate spiniform setae on ventral margin, and four serrate spiniform setae on distal outer surface. Propodus with four ventral serrate spiniform setae. Dactylus sensory organ with five sensory setae.

Pereopod 4 (Figs. 74E, F). Basis approximately 2.3 times longer than broad, with several distal simple setae and two proximal broom setae on dorsal margin. Ischium with three simple setae on ventrodistal corner. Merus shorter than carpus, with two distal simple setae and three spiniform setae ventrodistally. Carpus with five spiniform setae on outer surface and seven spiniform setae on inner surface. Propodus with eight serrate spiniform setae on outer surface, six serrate spiniform setae on inner surface, one terminal serrate spiniform seta, five short bipinnate setae on outer and inner surface, and one proximal broom seta on dorsal margin. Dactylus shorter than propodus, with tuft of approximately seven sensory setae; unguis absent.

Pereopod 5 ( Figs. 75A, B ). Similar to pereopod 4. Basis approximately 2.7 times as long as broad. Propodus with six serrate spiniform setae on outer surface and six serrate spiniform setae on inner surface. Only one short bipinnate seta on inner surface and none on outer surface.

Pereopod 6 ( Fig. 75C ). Basis slender, approximately 4.8 times as long as broad, with one proximal broom seta on outer surface, eight plumose setae on dorsal margin, three plumose and three simple setae on ventral margin. Ischium with four simple setae on ventral margin. Merus as long as ischium, with three plumose setae on dorsal margin and three simple setae on ventral margin. Carpus approximately three times as long as merus, with five simple setae on ventral margin, three plumose and three simple setae on dorsal margin, and two simple setae distally on outer surface. Propodus shorter than the carpus, with four spiniform setae on ventral margin, one spiniform seta on outer surface near dactylus insertion, and 23–24 short bipinnate setae. Dactylus longer than propodus, with one subdistal seta; unguis absent.

Pleopods not examined.

Uropods ( Fig. 75D ). Basal article with several proximal and distal simple setae. Exopodite with three articles, distal article longest, approximately 3.5 times as long as second article, with four simple setae. Endopodite multiarticulated (exact number difficult to determine due to incomplete fusion in some articles).

Female. unknown.

Type locality. Coral Sea , Queensland, Northeast Australia (Fig. 1, number 30) .

Geographic distribution. Known from type locality only.

Remarks. Kalliapseudes quadrirobustirostris n. sp. is the second known member of the genus to be recorded from Queensland, Eastern Australia ( K. langi Guţu, 2006 being the other species). Kalliapseudes quadrirobustirostris n. sp. can be distinguished from K. langi by the following characters: 1) square rostrum, 2) no anterolateral protuberances on the pereonites, 3) more setae posteriorly on the pleotelson, 4) more articles in the antennule inner flagellum, 5) three plumose setae on cheliped and pereopod 1 exopodite (four in K. langi ). The only other species of Kalliapseudes to have a square rostrum is Kalliapseudes gutui n. sp. from New South Wales, Eastern Australia (described below) but is not as pronounced as in Kalliapseudes quadrirobustirostris n. sp. and is broader than long. Kalliapseudes quadrirobustirostris n. sp. also differs from Kalliapseudes gutui n. sp. in the following characters: 1) pleotelson with more posterior setae, 2) accessory flagellum of antennule with six articles (three in Kalliapseudes gutui n. sp.), 3) larger cluster of aesthetascs in main flagellum of antennule, 4) fixed finger of cheliped with a larger tooth, 5) exopodite of cheliped and pereopod 1 with three plumose setae (two in Kalliapseudes sp. B ), and 6) inner surface of pereopod 5 propodus with one short bipinnate seta (none in Kalliapseudes gutui n. sp.).

Figures

FIGURE 73. Kalliapseudes quadrirobustirostris n. sp., adult male. A, dorsal view of body; B, antennule (ventral); C, antenna; D, terminal spiniform seta of mandibular palp; E, labium; F, cheliped (outer). Scale bars: A = 1.0 mm; B, C, F = 0.2 mm; D, E = 0.05 mm.

FIGURE 75. Kalliapseudes quadrirobustirostris n. sp., adult male. A, pereopod 5 (outer); B, pereopod 5 (inner); C, pereopod 6 (outer); D, uropod. Scale bars: A, C = 0.2 mm; D = 0.1 mm.