Victometopa rorida, Krapp-Schickel, Traudl, 2011

Krapp-Schickel, Traudl, 2011, On the Austral-Antarctic stenothoids Proboloides, Metopoides, Torometopa and Scaphodactylus (Crustacea Amphipoda) Part 2: the genus Proboloides, with description of two new genera and the transfer of two nominal species to Metopoides, ZooKeys 86, pp. 11-45 : 27-28

Victometopa rorida sp. n. Figs 1112

Holotype.

Male 4.4mm. Cruise 79-K-1, Stn 34, 30°38'42"S, 148°49'24"E, Flinders Canyon, eastern Bass Strait, 770 m, 27.3.1979. Sediment: shell/sand, gear: dredge. MVM J 39597

Paratype.

Male 4.2mm. Same locality.

Etymology.

The Latin adjective roridus means "set with dew" and should stress the “pearls” on the Cx3 in this species.

Description.

Length.

4.2 - 4.4 mm

Body.

Smooth. P3-7 all clearly prehensile, with falcate-concave, strikingly long merus and strong dactylus opposing with spinose propodus.

Head.

Lateral cephalic lobes subacute or blunt, triangular. Eyes rounded, medium.

Antennae.

A1: body length ≥ 0.66 body, ped. art 1 l:b>3; ped. art 2 ≥art 1; art 1 =cephalon; ped. art 3 ≤0.3 art 1; acc. flag. absent; flagellum arts 11-20. A2 ped.art 5> flag., ped. art 4 =art 5, nr. flag. arts ≤ 9 (A2 broken into pieces, thus indications not totally sure).

Mouthparts.

Mdb palp one long article, on tip a fine articulation-line visible, marginally no setation, distally 1 long and 1 shorter seta. Mxp outer plate reduced.

Coxae.

Cx2:Cx1 ratio of length>3. Cx2 l:b (l=parallel post. margin) <1.5. Cx3 unusually widened, nearly as long as wide, distoposterior margin with strong “pearls” or stridulation ridges. Cx4 l<b, distally not excavated.

Gnathopods.

Gn1 dactylus ordinary. Gn1 palm subequal to half propodus length; propodus palm angle 180-150°, blunt; propodus shape rounded, l≤ 2b; carpus l>2b; merus free projecting; carpus longer than propodus. Gn1 propodus <0.33 Gn2 propodus. Gn1, 2 propodus shape different. Gn2 propodus ≥coxa and basis in male, palm in male smooth, only at dactylus-insertion some serrations; carpus very short, merus small, subquadrangular, not lobate.

Peraeopods.

In all dactylus clearly longer than propodus. P3,4 merus long, falcate curved, nearly twice the length of propodus. P5 basis distally somewhat widened but strongly lengthened to lobe maximal to minimal breadth 1.4-1.6; merus also nearly twice the length of propodus, posterodistal tip neither lengthened nor widened. P6 basis hind margin with straight margins, merus anterior and posterior margin subequal, distally not lengthened, reaching no carpus. P7 basis wider than in P6, but posterior margin also rather straight.

Epimeral plates.

Ep3 posterodistally rectangular corner.

Urosome.

U1 rami equal. U1 peduncle longer than ramus. U2 rami different, the shorter is longer than 0.66 % of the longer one, peduncle is longer than rami, spination weak. U3 with very long peduncle, much longer than ramus; ramus art 1:2 <1, spination poor.

Telson.

l:b ≤2, distally rounded, marginally with two strong robust setae.