Ampelisca mingela, Poore & Lowry, 2023

Poore, Gary C. B. & Lowry, James K., 2023, New Australian Species of Ampeliscidae (Crustacea: Amphipoda) from the Great Barrier Reef and Eastern Australia with a Key to Australian Species, Records of the Australian Museum (Rec. Aust. Mus.) 75 (4), pp. 519-533 : 526-528

Ampelisca mingela sp. nov.

urn:lsid:zoobank.org:act:6EC8E9AB-00A8-40A0-AE4E-0FF1D562224A

Figs 4 , 5

Holotype: AM P.85992 (with 4 microslides), female, tl. = 9.0 mm. Australia, Queensland, Lizard Island , between Mangrove Beach and South Island, 14°41'S 145°28'E, 30 Sep 1978 . Paratypes: AM P.105871, 2 specimens, Lizard Island lagoon, 14°40'S 145°27'E, plankton tow, J. M. Leis, 24 Jul 1979 ; AM P.105863, 1 specimen, Lizard Island, Blue Lagoon, 500 m east of Palfrey Island , 14°40'S 145°28'E, A . R. Jones & C. J. Short, 9 Oct 1978 ; AM P.105864, 1 specimen, Lizard Island, Blue Lagoon, 500 m east of Palfrey Island , 14°40'S 145°28'E, A . R. Jones & C. J. Short, 9 Oct 1978 ; AM P.105866, 4 specimens, Lizard Island, fringing reef between Bird Islet and South Island , 14°41'S 145°27'E, J. K. Lowry, 7 Oct 1978 ; AM P.105868, 2 specimens, Lizard Island, fringing reef between Bird Islet and South Island , grass beds, 14°40'S 145°28'E, P. C. Terrill, 9 Oct 1978 ; AM P.105862, 2 specimens, Lizard Island, halfway between Mangrove Beach and South Island , 14°40'S 145°28'E, A . R. Jones & C. J. Short, 30 Sep 1978 ; AM P.105865, 1 specimen, Lizard Island, mid-channel between Bird Islet and Trawler Beach , 14°40'S 145°28'E, A . R. Jones , 12 Oct 1978 ; AM P.105867, 1 specimen, Lizard Island, off southern point of Mermaid Cove , 14°41'S 145°28'E, C. J. Short & P. C. Terrill, 8 Oct 1978 ; AM P.105869, 3 specimens, Lizard Island, reefs at western end of Blue Lagoon , 14°40'S 145°28'E, P. C. Terrill, 5 Oct 1978 ; AM P.105870, 1 specimen, near Lizard Island, 1.6 km south-west of Eagle Island , 14°38'S 145°22'E, air lift, J. K. Lowry, 17 Oct 1978 ; NMV J2164 , 6 individuals, Australia, Queensland, Lizard Island , Blue Lagoon, 10 m, 30 Oct 1978 . AM P.105872, 4 specimens, Heron Island , bommie west of harbour entrance, 23°26'S 151°55'E, J. K. Lowry, 7 Dec 1978 .

Description of holotype. Head. Head 1.5 times as long as deep; anteroventral margin oblique-horizontal; eyes present, with 2 pairs with minute cuticular lenses. Antenna 1 peduncular article 2 1.5 times length of article 1; flagellum almost reaching end of peduncle of antenna 2. Mandible palp article 2 tapering distally.

Pereon. Coxae 1–3 with small posteroventral hooks on coxae 1 and 2. Gnathopod 1 coxa anterior margin straight, anteroventral corner not produced. Pereopod 3 merus with 2 distal setae on extensor margin, with 6 distal setae on flexor margin; carpus with 3 setae on flexor margin; propodus with 7 setae on extensor margin; dactylus twice as long as propodus. Pereopod 4 merus 2.3 times as long as wide, with setose margins; dactylus twice as long as propodus. Pereopod 7 basis posterodistal margin reaching half ischium length, convex, oblique, distal margin densely setose; ischium longer than merus; merus anterior lobe slightly produced along anterior margin of carpus; carpus short (about as long as broad), carpus anterior lobe overlapping one-quarter length of propodus; propodus inflated; dactylus lanceolate.

Pleon. Epimeron 2 posteroventral margin broadly convex. Epimeron 3 ventral margin convex, posteroventral corner with sharp triangular tooth under shallow notch. Urosomite 1 with distally upturned carina. Urosomites 2–3 dorsal margin concave. Uropod 1 reaching beyond base of uropod 2 rami. Uropod 2 inner ramus upper margin with 7 short robust setae, lower margin with 2 short robust setae; outer ramus with 1 long subterminal robust seta, upper margin with 4 short robust setae, outer margin with 6 short robust setae. Uropod 3 inner ramus broadly lanceolate, upper margin with 1 seta, lower margin with distal setae; outer ramus 4 times as long as wide, distal upper margin with 8 setae. Telson 1.6 times as long as wide, deeply cleft (70%), lateral margins evenly convex, with sublateral ridge bearing few setae; with pair of posterior prominent triangular teeth separated from lateral margins by deep notches bearing 2 pairs of subapical setae.

Distribution. Australia, Queensland (Lizard Island, Heron Island), lagoon, to 10 m.

Remarks. The telson, arrangement of the two pairs of cuticular lenses, pereopod 7 and relative lengths of the antennae of Ampelisca mingela sp. nov. resemble those of A. dingaal King, 2009 also from Lizard Island. The posterior margin of epimeron 3 of A. mingela is convex (straight in A. dingaal ), article 2 of the mandibular palp is three times as long as wide (five times), antenna reaches most of the way along article 5 of antenna 2 (less than halfway) and the telson is 1.6 times as long as wide (2.0 times).

Figures

Figure 4. Ampelisca mingela sp. nov., holotype, female, 9.0 mm, AM P.85992.

Figure 5. Ampelisca mingela sp. nov., holotype, female, 9.0 mm, AM P.85992.