Nuuanu titaseyi, Hughes, L. E. & Bopiah, A., 2013

Hughes, L. E. & Bopiah, A., 2013, New species of Nuuanu (Amphipoda: Nuuanuidae) from Norfolk Island, Torres Strait and the Cocos (Keeling) Islands, Zootaxa 3641 (2), pp. 165-176 : 174-175

Nuuanu titaseyi sp. nov.

( Fig 8 )

Type material. Holotype, male, 3.25 mm, dissected, 4 slides, AM P.90056; paratypes, 2 juvenile specimens, AM P.90057, near shore, western side of Hawkesbury Island, Torres Strait, Queensland (10°21'44"S 142°07'04"E), 8 m, soft sediment, 1 October, 2006, coll. J.K. Lowry & M. Capa, MV Madame Dugong (QLD 1900).

Type locality. Hawkesbury Island, Torres Strait, Queensland, Australia.

Etymology. Named for Tony Titasey skipper of the MV Madame Dugong.

Diagnosis. Antenna 1 article 2 geniculate with article 1. Gnathopod 2 propodus subovoid, posterior margin densely setose, propodus palm acute, not distinct from posterior margin, palm with 7 robust setae, distal shelf weak, not produced; dactylus long, 0.5 times length of the propodus. Pereopods 5–7 distally slender, length subequal. Pereopod 5 basis posterior margin straight. Pereopod 6 basis posterior margin tapering.

Pleonites 1–2 with dorsodistal spine. Epimera 1–3 posterior margin straight, corner with small acute tooth. Uropod 1 inner ramus shorter than peduncle length. Uropod 3 inner ramus length 0.5 times outer ramus.

Description. Based on holotype male, 3.25 mm, AM P.90056.

Head lateral cephalic lobe apically acute with anteroventral slit; anteroventral corner rounded. Eyes poorly developed, ommatidia separated. Antenna 1 longer than antenna 2; peduncular article 1 longer than article 2; article 2 geniculate with article 1, longer than article 3, primary flagellum with 11 articles; accessory flagellum 3- articulate. Antenna 2 peduncular article 2 produced dorsodistally; flagellum with 7 articles. Mandible molar welldeveloped triturative; accessory setal row with 9 setae; palp article 1 twice as long as broad; article 3 linear, shorter in length than article 2.

Pereon. Gnathopod 1 merus posterodistal corner acute; carpus 1.2 times as long as propodus; propodus palm defined by corner with 2 setae (bifurcation not observed). Gnathopod 2 merus acutely produced distoventrally; carpus as long as broad, lobate, projecting between merus and propodus; propodus subovoid, facial surface with dense slender setae proximally, posterior margin weakly convex, propodus palm acute with 5 robust setae, distal shelf weak, not produced with 2 robust setae; dactylus long, 0.5 times length of the propodus. Pereopod 3 coxa similar in length to coxa 2. Pereopod 4 coxa posteroventral lobe well-developed, subquadrate. Pereopods 5–7 distally slender, length subequal; basis posterior margin castellate. Pereopod 5 basis posterior margin straight. Pereopod 6 basis posterior margin tapering. Pereopod 7 basis posterior margin convex.

Pleon. Pleonite 1–2 with dorsodistal spine. Epimera 1–3 posterior margin straight, corner with small acute tooth. Urosomite 1 without carina. Uropod 1 peduncle without basofacial robust seta; inner ramus subequal to outer ramus length, shorter than peduncle length. Uropod 2 inner ramus subequal to outer ramus length, subequal to peduncle length. Uropod 3 inner ramus reduced, length subequal to breadth, 0.5 times outer ramus; outer ramus 2- articulate; article 1 length twice breadth, with 1 lateral robust seta; article 2 minute, as broad as long. Telson unknown.

Remarks. See remarks for Nuuanu quintalana sp. nov.

Distribution. Australia: Torres Strait, Queensland (current study)

Figures

FIGURE 8. Nuuanu titaseyi sp. nov., holotype male, AM P. 90056, 3.25 mm, western side of Hawkesbury Island, Torres Strait, Queensland, Australia (scales represent 0.1 mm).