Hoho wittecarra, Hughes, 2011

HUGHES, L. E., 2011, New species of Hoho, Mallacoota and Parelasmopus (Maeridae: Amphipoda) from Australian waters, Zootaxa 2955 (1), pp. 1-79 : 29-32

Hoho wittecarra sp. nov.

( Figs 19 , 20)

Type material. Holotype: male, 6.8 mm, dissected, 3 slides, AM P.79375 . Paratypes: 4 males, 10 females, AM P.79396, Red Bluff, Kalbarri , Western Australia (27°42'S 114°09'E), 3–4 m, rocky shore, mixed algae, sediment, 10 January 1984, coll. R. T. Springthorpe (WA 474) .

Type locality. Red Bluff, Kalbarri , Western Australia (27°42'S 114°09'E) .

Etymology. Named from Wittecarra Creek near Red Bluff, the type locality.

Description. Based on holotype, male, 6.8 mm, AM P.79375.

Head. Eyes ovate; lateral cephalic lobe broad, truncated, anteroventral margin with notch/slit. Antenna 1 longer than antenna 2; peduncular article 1 shorter than article 2, with 2 robust setae along posterior margin; article 2 longer than article 3; flagellum articles as long as broad; flagellum with 19 articles; accessory flagellum minute, with 3 articles. Antenna 2 peduncular article 2 cone gland reaching at least to end of peduncular article 3; article 4 longer than article 5; flagellum with 7 articles. Lower lip outer lobes with two pair of ducts, mandibular lobes apically subacute. Mandible accessory setal row, well developed with 3 setae; molar well developed, triturative; mandibular palp reduced, 1-articulate; article 1 at least 3.5 times as long as broad.

Pereon. Gnathopod 1 coxa anterior margin straight, anteroventral corner produced, rounded; carpus about twice as long as broad, subequal in length to propodus; propodus medial surface with comb, palm acute, convex, entire, defined by posterodistal corner, with 4 robust setae. Gnathopod 2 subchelate; basis broad, anterodistal corner subquadrate; merus with rounded distoventral corner; carpus compressed, lobate, projecting between merus and propodus; propodus massive, with sparse setal bunches along posterior margin, palm straight, sculptured, about half length of propodus, subquadrate distomedial shelf, with 4 robust setae on shelf, palmar margin with 5 subacute teeth, palm defined by posteroventral tooth, without posterodistal robust setae, subpalmar surface with ridge; dactylus with posteroproximal shelf, apically subacute, closing along palm. Pereopod 4 coxa posteroventral lobe well developed, with rounded posteromedial corner. Pereopods 5–7 basis slightly expanded, posterior margin minutely castelloserrate, without long slender setae; merus and carpus not broadened; carpus and propodus without long, slender setae along posterior margin; propodus not expanded posterodistally; dactylar ungues simple. Pereopods 5–6 basis posterior margin straight, posteroventral corner broadly rounded. Pereopod 7 basis posterior margin convex, posteroventral corner broadly rounded. Pereonite 7 without carina.

Pleon. Pleonites 1–2 bicarinte. Pleonite 3 without carina. Epimera 1–2 posteroventral corner with small acute tooth. Epimeron 3 ventral margin smooth, posteroventral margin smooth, posteroventral corner with small acute tooth. Urosomite 1 bicarinate, subtriangular. Urosomites 2–3 without carina. Uropod 1 peduncle with 1 basofacial seta; outer ramus slightly shorter than inner ramus. Uropod 2 outer ramus slightly shorter than inner ramus. Uropod 3 rami distally truncated, apical robust setae long; inner ramus long (length twice the breadth), subequal in length to outer ramus; outer ramus longer than peduncle. Telson deeply cleft, broader than long, tapering distally, with short inner and long outer apical cusps, apical conical extension reaching at least halfway along longest seta, each lobe with 2 long and 2 short apical robust setae.

Remarks. See remarks for H. tricarinata sp. nov.

Distribution. Australia. Western Australia: Kalbarri (current study).

Figures

FIGURE 19. Hoho wittecarra sp. nov. holotype, 6.8 mm, AM P.79855, Kalbarri, Western Australia.