Hemikalliapseudes makellus Bamber, 2003

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 28-35

Hemikalliapseudes makellus Bamber, 2003

(Figs 15–19)

Hemikalliapseudes makellus Bamber, 2003: 227 , Figs. 1–6. Guţu, 2006: 163, 164, 171.

Type material. Holotype, male no. NHM 2002.886, 20 paratypes (13 females, 6 males, and 1 manca) no. NHM 2002.888–897.

Material examined. 7 adult females, 3 adult males and 2 juveniles ( GCRL 2989 ), topotypic material, 06°10'S, 11°29'E, Angola, West Africa , 231–236 m, fine mud, 73%–81% silt–clay, coll. Roger Bamber.

Diagnosis. Anterolateral corners of pereonites 2–6 without apophyses. Antennule inner flagellum biarticulate. Antenna flagellum with four articles. Mandibular palp first article with two setae. Pereopod 1 with a coxal spine and without exopodite. Female cheliped basis with mid–ventral tubercle approximately 3.5 times as long as broad. Male cheliped fixed finger cutting edge with a proximal tooth approximately three times as long as broad.

Supplemental description (preparatory female). Length 4.4 mm, about seven times as long as broad. Carapace (Fig. 15A) about as long as broad, naked; rostrum square, scalloped, and slightly concave anteriorly; eyelobes present, eyes absent; scales covering eyelobes. Pereonite 1 shortest, about 0.5 times as long as broad; pereonites 3–5 longer than others and subequal, about as long as broad; one or two pairs of setae on anterolateral corners of pereonites 2–6; hyposphaenia absent. Pleonites (Fig. 15A) with 4 or 5 lateral plumose setae; hyposphaenia absent. Pleotelson (Fig. 15A) 1.4 times as long as broad; one pair of proximal lateral setae and two pairs of dorsodistal setae; anal plate present.

Antennule (Fig. 15B). First article about 1.7 times as long as second and third articles combined and about 3.3 times as long as broad; scales present. Inner flagellum biarticulate, with three terminal setae. Outer flagellum with six articles and one aesthetasc on article 4; distal article with three terminal setae.

Antenna (Fig. 15C). First article with medial extension bearing small terminal triangular processes and three short simple setae. Squama with five simple setae. Flagellum with four articles; distal article with four terminal setae.

Labrum (Fig. 15D) with terminal hair–like setae and dorsal surface with spinules.

Mandibles (Figs. 15E–G). Right mandible with quadra–dentate incisor process. Left mandible with five or six denticulations on incisor process; lacinia mobilis with five denticulations. Both mandibles with spine row of five simple or bifurcate spines. Mandibular palp with three articles, first article with two plumose setae; second article of right mandibular palp with about seven short pinnate setae and distal article with three pinnate setae increasing in length distally; second article of left mandibular palp with about six short spiniform setae and distal article with three short prong–like setae and one pinnate seta.

Labium (Fig. 15H). Distal margin provided with short hair–like setae. Palp with long hair–like setae on inner

Maxillule (Fig. 15I). Inner endite bearing four terminally setulate setae and dense row of hair–like setae on outer face. Outer endite with 11 distal spiniform setae, two subterminal bipinnate setae and with short hair–like setae on outer margin.

tipped simple setae. Inner lobe of moveable endite with several serrate and simple, blunt setae; outer lobe of moveable endite with five long, simple setae.

Maxilliped (Fig. 16B). First article of palp with two simple setae; second article largest with several long, simple setae; third article with four simple setae; distal article shortest with three long pinnate setae, one long simple seta and one short simple seta. Endite with eight circumplumose setae on inner side and several distal flat, bifurcate and spiniform setae, and with four coupling hooks (Fig. 16C). Epignath (Fig. 16D) with short hair–like setae and long, terminal spiniform seta.

Cheliped (Figs. 16E, F). Basis about three times as long as broad, with elongate (~ 2.7 times as long as broad) mid–ventral tubercle bearing terminal long, simple seta; two simple setae on ventrodistal corner. Merus about 3.5 times as long as broad, with several simple setae on ventral and distal margins. Carpus about four times as long as broad, with several simple setae. Propodus with several simple setae; fixed finger about two–thirds length of dactylus with several simple setae increasing in length distally; cutting edge with eight short pinnate setae; unguis present. Dactylus with four long spinules on cutting edge; unguis long and slender. Exopodite absent.

Pereopod 1 (Fig. 16G) with spiniform coxa provided with some short simple setae and one plumose seta. Basis about 2.3 times as long as broad, with one long and one short simple setae on ventrodistal corner. Ischium with one long and two short simple setae on ventrodistal corner. Merus about 2.3 times as long as broad, with several simple setae and one spiniform seta on ventrodistal corner. Carpus about 1.4 times as long as broad, with several simple setae, three ventral spiniform setae, one spiniform seta on dorsodistal corner, and scales on outer surface. Propodus shorter than carpus, with five spiniform setae and seven short bipinnate setae, and with scales on outer surface. Dactylus shorter than propodus, with six terminal setae; unguis absent. Exopodite absent.

Pereopod 2 (Fig. 16H). Basis almost four times as long as broad, with one ventrodistal seta. Ischium with two short and one long ventrodistal setae. Merus with one ventrodistal spiniform seta. Carpus with several simple setae and one ventrodistal spiniform seta. Propodus with several simple, one bipinnate and three spiniform setae. Dactylus with subterminal seta.

Pereopod 3 ( Fig. 17A ). Similar to pereopod 2. Carpus with two spiniform setae. Propodus with four spiniform setae.

Pereopod 4 ( Fig. 17B ). Basis almost four times as long as broad, with one short distal spiniform seta. Ischium and merus with two ventrodistal simple setae. Carpus with several simple and four spiniform setae. Propodus with four spiniform and several distal pinnate setae. Dactylus as in pereopod 2.

Pereopod 5 ( Fig. 17C ). Similar to pereopod 4. Carpus with three spiniform setae. Propodus with eight spiniform setae and lacking distal pinnate setae.

Pereopod 6 ( Fig. 17D ). Basis almost four times as long as broad, with seven dorsal plumose setae and one ventrodistal simple seta. Ischium with one ventrodistal seta. Merus with few ventral simple setae and one dorsal plumose seta. Carpus with several ventral simple setae and three dorsal plumose setae. Propodus about same length as carpus, with six spiniform setae and 26 short, pinnate setae. Dactylus shorter than propodus, with one short distal seta; unguis present.

Pleopods ( Fig. 18A ). Basal article with two plumose setae. Exopod with 14 plumose setae; endopod with 12 plumose setae.

Uropod (Fig. 15A). Exopodite having four articles and distal article bearing three simple setae. Endopodite articulation indistinct; three times length of pleotelson.

Male. Similar to female with following differences: length ~ 4.0 mm, about 6.5 times as long as broad ( Fig. 18B ). Carapace with many scales.

Antennule ( Fig. 18C ). Outer flagellum with eight articles; one aesthetasc on articles 2, 3 and 4.

Mandibular palps ( Figs. 19C, D ). Second article of right mandibular palp with eight short pinnate setae and distal article with five pinnate setae; second article of left mandibular palp with nine pinnate setae and distal article with four pinnate setae.

Cheliped ( Figs. 18E, F ). Basis globular, about 1.6 times as long as broad; mid–ventral tubercle very short. Merus robust, about twice as long as broad. Carpus about 1.5 times as long as broad. Propodus very robust, with several short, simple setae on outer surface; fixed finger with large tooth and four short pinnate setae on cutting edge. Dactylus cutting edge with six spinules and one proximal short tooth.

Pereopod 6 ( Fig. 19B ). Basis with five dorsal plumose setae. Propodus with five spiniform setae and 25 short pinnate setae.

Remarks. A full supplemental description of this species is included here to expand on that of Bamber (2003). There were some differences between the specimens we studied compared with Bamber’s (2003) description. The specimens we studied have scales on the carapace and on the first article of the antennule peduncle, the basal article of the antenna having a medial extension, and the maxillipedal endite exhibiting four coupling hooks. Minor differ- Hemikalliapseudes makellus is most similar to H. vasileradui Guţu, 2006 but can be distinguished by having a much longer mid–ventral tubercle on the basis of the female cheliped; by having fewer articles in the antenna flagellum; by having the medial extension of the antenna with small triangular protuberances; and by having fewer setae on the antenna squama, mandibular palps, merus and carpus of the female cheliped, and dactylus of the first pereopod. Examination of mancas dissected from the brood pouch of an ovigerous female revealed the presence of exopodites on the last two pereopods, the first known occurrence of this character reported in the subfamily Hemikalliapseudinae .

Hemikalliapseudes vasileradui Gu ţ u, 2006

Hemikallliapseudes vasileradui Guţu, 2006: 164–171 , Figs. 262–285.

Type material. Holotype ovigerous female no. 250.289, allotype male no. 250.290 and 70 paratypes (40 females no. 250.291 and 30 males no. 250.292), MHN Grigore Antipa.

Material examined. None available for study. Tentative diagnosis prepared from that by Guţu (2006).

Diagnosis. Pereonites 2–6 with anterolateral corners having apophyses. Antennule inner flagellum biarticulate. Antenna flagellum with five articles. Mandibular palp first article with four setae. Pereopod 1 with coxal spine and without exopodite. Female cheliped basis with mid–ventral tubercle approximately 1.5 times as long as broad. Male cheliped fixed finger cutting edge with proximal tooth approximately twice as long as broad.

Type locality. NE Atlantic, Mauritania, West Africa , 20°47'N 17°29'W, depth 96 m (Fig. 1, number 7) .

Geographic distribution. NE Atlantic, Mauritania, West Africa , depth 96–290 m.

Remarks. Hemikalliapseudes vasileradui is most similar to H. makellus (see the “remarks” section under H. makellus for a discussion on the distinguishing characters).

Figures

FIGURE 17. Hemikalliapseudes makellus, female with oostegites. A, pereopod 3 (outer view); B, pereopod 4 (outer view); C, pereopod 5 (inner view); D, pereopod 6 (inner view). Scale bars = 0.1 mm.

FIGURE 18. Hemikalliapseudes makellus, female with oostegites (A), pleopod; adult male (B–G). A, pleopod; B, dorsal view of body; C, antennule; D, antenna; E, cheliped (outer view); F, chela (outer view); G, pereopod 1 (inner view). Scale bars: A, D = 0.05 mm; B = 0.4 mm; C, G = 0.2 mm; E = 0.1 mm.

FIGURE 19. Hemikalliapseudes makellus, adult male. A, pereopod 1 (distal, outer view); B, pereopod 6 (outer view); C, left mandibular palp; D, right mandibular palp. Scale bars: B = 0.1 mm; C = 0.05 mm.