Tomituka eumilli Hughes 2009, sp. nov.
Creators: name: Hughes, L. E.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Platyischnopidae
Tomituka
Tomituka eumilli

description: <i>Tomituka eumilli</i> sp. nov. (Figs 3, 4) <b>Type material.</b> Holotype, male (dissected), 1A, 4.5 mm, 3 slides, AM P75492, reef front, northern-most bay, Fantome Island (~ 18°41'10''S 146°31'08''E), sand sample, 3 m, J.D. Thomas, 14 February 1989 (JDT/ OPH 11). Paratypes: female, 1B, 5.6 mm, 3 slides, AM P75493, same station data; 14 specimens (4 males, 10 females), AM P75494, same station data. <b>Type locality</b>. Reef front, northern-most bay, Fantome Island, Queensland, Australia (~ 18°41'10''S 146°31'08''E). <b>Etymology.</b> Eumilli is the indigenous name for Fantome Island, the type locality. <b>Description</b>. Based on holotype, male, 4.5 mm, AM P75492. <b>Head.</b> <i>Head</i> with lateral keel; rostrum without apical constriction. <i>Eyes</i> present. <i>Antennae 1</i> article 2 elongate, greater than 1.1 times article 1; flagellum with 6 articles; accessory flagellum 2-articulate. Antennae 2 brush setae present (in male); flagellum with 39 articles. <i>Upper lip</i> subovoid, apically rounded. <i>Mandible</i> accessory setal row absent; mandibular molar subovoid, large, (covering more than 1/2 of medial surface); mandibular palp article 2 subequal to article 3, article 2 with 1 seta, article 3 with apical and medial setae. <i>Lower lip</i> mandibular lobes weakly produced, apically rounded, with lobes directed posteriorly. <i>Maxilla 1</i> palp short, extending to end of outer plate, with 3 apical setae; inner plate setae absent. <i>Maxilla 2</i> outer plate with many apical setae; inner plate with many apical setae. <i>Maxilliped</i> dactylus well developed, articulate. <b>Pereon.</b> <i>Gnathopod 1</i> chelate; coxa large, similar in size to coxa 2, broader than long, anterior margin produced, apically rounded; carpus longer than propodus, around six times as long as broad; propodus about three times as long as broad, chela short, obtuse projection broader than long. <i>Gnathopod 2</i> chelate; carpus longer than propodus, six times as long as broad; propodus about three times as long as broad, chela short, obtuse projection broader than long. <i>Pereopods 3–4</i> articles rectolinear; dactylus simple, long, more than half the length of the propodus. <i>Pereopod 3</i> coxa expanded distally. <i>Pereopod 4</i> coxa anterodistal margin not produced, posteroventral lobe absent. <i>Pereopod 5</i> coxa posterior lobe anterior margin diagonal; basis slightly longer than broad, posterodistal lobe well developed. <i>Pereopod 6</i> coxa posterior lobe long, extending more than half the length of the basis, with robust setae; basis subovoid; merus about as broad as long. <i>Pereopod 7</i> basis posterior margin acutely produced; carpus 2 times as long as broad; propodus 5 times as long as broad; dactylus short, less than half the length of the propodus. <b>Pleon.</b> <i>Pleonites 1–3</i> without dorsal teeth. <i>Epimeron 1</i> posterodistal corner rounded. <i>Epimeron 2</i> posterodistal corner with well developed tooth, posteroventral margin without notch. <i>Epimeron 3</i> posteroventral corner with well developed tooth; posteroventral margin with notch above distal tooth. <i>Uropod 1</i> peduncle with 7 robust setae. <i>Uropod 2</i> peduncle with 4 robust setae; inner ramus shorter than outer ramus. <i>Uropod 3</i> outer ramus article 2 slender, with 4 sets of lateral robust setae. <i>Telson</i> moderately cleft, with dorsofacial robust setae, lateral robust setae present, with 2 pairs of apices, apices subequal. <b>Habitat.</b> Sublittoral sandy bottoms. <b>Remarks.</b> <i>Tomituka eumilli</i> <b>sp. nov</b>. can be differentiated from <i>T. doowi</i> Barnard &amp; Drummond, 1979 by the unconstricted rostrum, which is strongly constricted in <i>T. doowi</i>. The accessory flagellum is 2-articulate in <i>T. eumilli</i> <b>sp. nov</b>. and 8-articulate in <i>T. doowi</i>. The maxilliped, mandibular palp article 2, maxilla 1 palp and maxilla 2 are less setose than those of <i>T. doowi</i>. In <i>T. eumilli</i>. there is no accessory setal row on the left or right mandible. In <i>Tomituka doowi</i> there are three setae in the accessory setal row and a large grinding surface on the adjacent to the incisor, which is not present on <i>T. eumilli</i> <b>sp. nov</b>. In <i>Tomituka eumilli</i> the telson has less robust setae and is not as cleft as in <i>T. doowi</i>. The uropod 3 outer ramus article 2 in <i>Tomituka eumilli</i> is more robust and has lateral robust setae, than the article 2 of <i>T. doowi,</i> which is slender and without setae. <b>Distribution</b>. <i>Australia</i>. Queensland: Lizard Island; Fantome Island; Orpheus Island (current study).
description: Published as part of <i>Hughes, L. E., 2009, Platyischnopidae *, pp. 828-835 in Zootaxa 2260 (1)</i> on page 832, DOI: 10.11646/zootaxa.2260.1.45, http://zenodo.org/record/5307020
description: {"references": ["Barnard, J. L. &amp; Drummond, M. M. (1979) Gammaridean Amphipod of Australia, Part IV. Smithsonian Contributions to Zoology, 269, I - III, 1 - 69."]}