Ampelisca jiigurru, King, 2009

King, Rachael A., 2009, The structure of the cataract causing P 23 T mutant of human gamma-D crystallin, Zootaxa 2260, pp. 132-142 : 138-142

Ampelisca jiigurru sp. nov.

( Figs 4 , 5 )

Type material. Holotype, female, 6.8 mm, AM P75274, Mrs Watsons Bay, Lizard Island, Queensland (14°39.41’S 145°27.14’E), coarse sand, sand with patchy seagrass and blue-green algae, hand dredge, 5 m, J.K. Lowry, C. Serejo & O. Coleman, 24 February 2005 (QLD 1645). Paratype, male, 5.7 mm, AM P 71034, 500 m north-east of North Point, Lizard Island (14°38.700’S, 145°27.213’E), coarse sediment with forams and Heteropsammia , soft bottom with forams, crinoids, Halimeda macroloba , Halimeda cylindracea, Caulerpa taxifolia, Gracilaria sp., Lobophora sp. ) and sediment, 23.9 m, P.B. Berents, 27 February 2005 (QLD 1717).

Additional material examined. 1 unsexed, P75526 (JDT/LIZ 9); 7 unsexed, P75525 (JDT/LIZ 10); 1 unsexed, P75522 (JDT/OPH 6); 1 unsexed, P75524 (JDT/OPH 9); 1 unsexed, P75523 (JDT/OPH 13); 10 unsexed, P70720 (QLD 1645); 19 unsexed, P70746 (QLD 1645); 11 unsexed, P70756 (QLD 1645); 1 unsexed, P70670 (QLD 1645); 1 unsexed, P75274 (QLD 1645); 1 unsexed, P70276 (QLD 1646); 2 unsexed, P70800 (QLD 1650); 1 unsexed, P70763 (QLD 1653); 1 unsexed, P70890 (QLD 1653); 1 unsexed, P70864 (QLD 1654); 1 unsexed, P70863 (QLD 1660); 1 unsexed, P70778 (QLD 1666); 4 unsexed, P70826 (QLD 1666); 1 unsexed, P70821 (QLD 1673); 1 unsexed, P70847 (QLD 1673); 1 unsexed, P70954 (QLD 1697); 1 unsexed, P71034 (QLD 1717); 2 unsexed, P71081 (QLD 1717); 1 unsexed, P71134 (QLD 1729); 2 unsexed, P71067 (QLD 1737); 1 unsexed, P71117 (QLD 1749); 1 unsexed, P71307 (QLD 1756); 1 unsexed, P71331 (QLD 1756); 1 unsexed, P71209 (QLD 1761); 1 unsexed, P71262 (QLD 1771); 1 unsexed, P71308 (QLD 1772); 2 unsexed, P71278 (QLD 1774); 2 unsexed, P71328 (QLD 1778); 1 unsexed, P71334 (QLD 1778) .

Type locality. Mrs Watsons Bay, Lizard Island , Queensland (14°39.41’S 145°27.14’E) .

Etymology. 'Jiigurru' is one variant of the name given to Lizard Island by the local aboriginal people (the Dingaal people).

Description. Based on holotype, female, 6.8 mm.

Head. Head longer than deep, distal margin concave, anteroventral margin concave; one eye present per side in the form of a distinct lens, with 1–2 other possible indistinct eye pigmented areas. Antenna 1 distinctly longer than peduncle of antenna 2; peduncular article 2 longer (1.7 x) than article 1. Antenna 2 distinctly shorter than body length.

Pereon. Coxa 1 to 3 each with a small posteroventral spine, spines becoming smaller progressively. Gnathopod 1 coxa similar length to coxa 2 and 3, distally rounded, with a row of 11–16 distal plumose setae and a row of 12–13 simple setae set behind the plumose setae on the outer face; basis with 4–5 long setae (plumose and simple) and 5–6 short setae on the dorsal margin, with 15–17 long setae (plumose and simple) on the ventral margin and 5–6 long setae on the outer face at mid length; ischium with 5–6 setae on ventral margin; merus with row of setae (plumose and simple) on ventral margin and an oblique row of 5–7 setae distally; carpus with 5–6 setae on dorsal margin, with at least 6 distinct oblique rows of setae along ventral margin; propodus dorsal margin setose, ventral margin with fringe of setae (plumose and simple); dactylus more than half length of propodus with 4 plumose setae on ventral margin. Gnathopod 2 coxa distally convex, with a row of 9–10 distal plumose setae and a row of 9–11 simple setae set behind the plumose setae on the outer face; basis with 10–19 setae (plumose and simple) on the dorsal margin and 10–16 long setae (plumose and simple) on the ventral margin; ischium with scattered setae on ventral margin; merus with scattered setae on ventral margin; carpus with 7–8 setae on dorsal margin, ventral margin with 5–6 oblique setal rows along margin; propodus dorsal margin setose, extending to 6 oblique rows of setae, ventral margin with rows of plumose and simple setae; dactylus more than half length of propodus with 4 plumose setae on ventral margin. Pereopod 3 coxa distally convex, with a row of 4–6 distal setae and a row of 6–10 smaller setae set behind on the outer face; basis with 6–8 setae on the dorsal margin and scattered setae on the outer face and ventral margin; ischium with scattered setae on ventral margin; merus with rows of 3–4 plumose setae distally on both the dorsal and ventral margins; carpus with 1–2 plumose setae on dorsal margin, ventral margin with 6–7 plumose setae; propodus dorsal margin setose, ventral margin without setae; dactylus broken but believed to be longer than carpus and propodus lengths combined. Pereopod 4 coxa with 4–5 distal setae and a row of 4– 5 setae set behind on the outer face; basis with 10–12 long setae on the dorsal margin (plumose and simple) and 10–12 long setae (plumose and simple) on the ventral margin; ischium with 4–5 long plumose setae on the ventral margin; merus with a row of 18–22 long plumose setae on both the dorsal and ventral margins; carpus dorsal margin with a single plumose seta, ventral margin with 4–5 plumose setae and simple setae; propodus with simple seta on dorsal margin; dactylus longer than carpus and propodus combined. Pereopod 5 basis with 6 long plumose seta on anterior margin. Pereopod 6 basis with 4 long plumose setae on anterior margin. Pereopod 7 basis strongly expanded distally, widest distally, distal expansion reaching to distal end of ischium, 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), anterior lobe slightly extending around propodus; propodus elongate (less than 2 times as long as broad), inflated (laterally convex), posterior margin with lateral tuberculation; dactylus tapering distally, slightly curved, shorter than propodus, posterior margin with tuberculation.

Pleon. Epimeron 1 distal margin evenly rounded, with anterior facing hooked seta. Epimeron 2 posteroventral corner with small spine. Epimeron 3 posteroventral corner with acute spine. Urosomite 1 dorsal margin with small distally rounded carina. Uropod 1 reaching to uropod 2 rami; inner ramus shorter than outer ramus. Uropod 2 outer ramus shorter than inner ramus; inner ramus with one lateral row of short robust setae; outer ramus with a large subterminal robust seta. Uropod 3 inner ramus serrate along inner margin to distal 1/ 2 length, with 0–4 plumose setae; outer ramus serrate along inner margin to distal 2/3 length, with up to 7 plumose setae. Telson dorsal surface with two rows of 5 setae, distal margin with shallow notch, with subdistal setae.

Male (sexually dimorphic characters). Antenna 1 with groups of short aesthetascs along peduncle and anterior articles of the flagellum. Urosomites 2 and 3 with fusion line slightly more indented in male.

Habitat. Marine; littoral (2–24 m), coarse sediments and sands.

Remarks. Ampelisca jiigurru sp. nov. is another species that belongs within the A. australis –group (see Remarks section for A. dingaal ). Ampelisca jiigurru can be easily separated from A. australis and A. dimboola by the length of antenna 1 (longer than peduncle of antenna 2 in A. jiigurru vs. much shorter in the other species), and by the serration of the rami of uropod 3 (not seen in A. australis or A. dimboola ). Ampelisca dingaal can be separated from A. tilpa by the length and shape of the basis of pereopod 7, the dorsal setation of the telson and the setation of uropod 2 rami. It can also be distinguished from A. yuleba by the length of antenna 1, the morphology of the mandibular palp and shape of the telson. The presence of only one distinct eye lens with additional pigmented areas on the head, long antenna 1, and setation of uropod 3 separates this species from A. dingaal sp. nov. Ampelisca jiigurru is most similar to A. toora but the two species can be separated by the shape of the urosomal carina and the shape of the basis of pereopod 7.

Distribution. Australia. Queensland: Lizard Island (current study).

Figures

FIGURE 4. Ampelisca jiigurru sp. nov., holotype, female, 7.1 mm, AM P75274, Mrs Watsons Bay, Lizard Island, Great Barrier Reef, paratype, male, 5.7 mm, AM P71034, near North Point, Lizard Island, Great Barrier Reef.

FIGURE 5. Ampelisca jiigurru sp. nov., holotype, female, 7.1 mm, AM P75274, Mrs Watsons Bay, Lizard Island, Great Barrier Reef.