Aborolobatea insidiosa Hughes &amp; Lowry 2009, sp. nov.
Creators: name: Hughes, L. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Oedicerotidae
Aborolobatea
Aborolobatea insidiosa

description: <i>Aborolobatea insidiosa</i> sp. nov. (Figs 1, 2) <b>Type material.</b> Holotype, female (dissected), 3 slides, 4.0 mm, AM P78121, First Lagoon, One Tree Island, Queensland, Australia (~ 23°30'S 152°05'E), night plankton tow, low tide, F.H. Talbot, 4 December 1966 (FT 107). Paratypes: 1 male (dissected), 3 slides, 4.0 mm, AM P78122 (FT 107); 25+ unsexed, AM P78196 (FT 107). <b>Additional material examined.</b> 5 unsexed, AM P78123 (JDT / OPH 11b); 3 unsexed, AM P78124 (JDT / OPH 11); 1 unsexed, AM P78125 (JDT / OPH 11); 3 unsexed, AM P78126 (JDT / OPH 13); 4 unsexed, AM P78127 (QLD 46); 1 unsexed, AM P28489; 3 unsexed, AM P78128 (QLD 1935); 6 unsexed, AM P78129 (QLD 1936); 25+ unsexed, AM P78130 (QLD 1948); 5 unsexed, AM P78131 (QLD 1955); 13 unsexed, AM P78132 (QLD 1964); 15+ unsexed, AM P78133 (QLD 1979). <b>Type locality.</b> First Lagoon, One Tree Island (~ 23°30.2’S 152°5.3’E). <b>Etymology.</b> From the Latin ‘insidiosum’ meaning ‘lying in wait’ and alluding to the oedicerotid behavour as an ambush predator. <b>Description.</b> Based on holotype, female, 4.0 mm, AM P78121. <b>Head.</b> <i>Head</i> rostrum well developed, broad, strongly deflexed, apically acute; eyes subovate, not coalesced, situated fully within head; lateral cephalic lobe absent. <i>Antenna 1</i> long, exceeding article 5 on antennae 2; peduncle sparsely setose; peduncular articles 1–2 shorter than peduncle of antenna 2; peduncular article 1 without tooth, subequal in length to article 2, shorter than article 3; peduncular article 3 elongate, subequal to article 2; flagellum without callynophore; without calceoli. <i>Antenna 2</i> peduncle sparsely setose, not greatly enlarged; flagellum without calceoli. <i>Mandible</i> molar reduced, not triturative, with tuft of setae; incisor left and right a straight, smooth blade; palp stout; article 2 straight, distally expanded with 9 slender setae; article 3 slightly shorter than article 2, falcate with many marginal setae. <i>Lower lip</i> inner lobes unknown; mandibular lobes slender, twice as long as broad directed axially. <i>Maxilla 1</i> outer plate with 9 setal-teeth; inner plate with 2 apical setae. <i>Maxilla 2</i> inner plate without oblique setal row. <i>Maxilliped</i> inner plate absent; palp article 2 greatly enlarged distal end, article 3 expanded distally, dactylus recurved at tip. <b>Pereon</b>. <i>Gnathopods 1–2</i> well developed; propodi similar in shape. <i>Gnathopod 1</i> subequal in size to gnathopod 2; weakly chelate; carpal lobes absent; propodus subrectangular (about 2 x as long as broad), propodus posterodistal margin smooth, palm slightly obtuse margin smooth. <i>Gnathopod 2</i> weakly chelate; carpus extremely elongate, 2.6 x longer than broad, carpal lobes absent; propodus subrectangular (about 3 x as long as broad), posterodistal margin smooth, palm obtuse. <i>Pereopods 3–4</i> carpi and propodi subequal in length; propodi posterior margins setose, dactyli minute, shorter than propodi, without apical setae. <i>Pereopod 3</i> coxa anterior margin straight, anteroventral corner not produced, ventral margin convex. <i>Pereopod 4</i> coxa ventral margin convex, with small posteroventral lobe. <i>Pereopods 5–6</i> similar in form; propodi posterior margins sparsely setose; dactyli shorter than propodi, slender, tapering, without ungues. <i>Pereopod 5</i> coxa small, depth distinctly less than coxa 4; merus not enveloping carpus. <i>Pereopod 7</i> basis with tapering margins, posterodistal lobe absent. <b>Pleon</b>. <i>Epimeron 3</i> posterior distal corner rounded. <i>Uropod 1</i> rami without setae; outer ramus shorter, about half length of inner; inner ramus smooth. <i>Uropod 2</i> rami with small robust setae; rami subequal. <i>Uropod 3</i> not greatly enlarged; rami with small robust setae; rami subequal in length. <i>Telson</i> apically truncate and slightly emarginate, with 2 apical robust setae. <b>Habitat.</b> Shallow sand bottoms. <b>Remarks.</b> <i>Aborolobatea insidiosa</i> differs from <i>A. paracheliformis</i> Ledoyer, 1984, as follows: rostrum sharply deflexed (slightly deflexed in <i>A. paracheliformis</i>); mandibular palp article 2 distally broadened (slightly expanded medially in <i>A. paracheliformis</i>), article 3 long and slender (short and broad in <i>A. paracheliformis</i>); maxilliped palp article 3 broad (slender in <i>A. paracheliformis</i>); lower lip mandibular lobes narrow and directed axially (broad and directed down in <i>A. paracheliformis</i>); gnathopods 1–2 with obtuse palms (transverse in <i>A. paracheliformis</i>); and subequal uropod 2 rami (outer ramus slightly shorter in <i>A. paracheliformis</i>). <i>Aborolobatea insidiosa</i> <b>sp. nov.</b> is the second species described in the genus and is a common, widespread species on the Great Barrier Reef. It can be distinguished from other oedicerotids on the GBR by the weakly chelate gnathopods 1–2 without carpal lobes; and the uropod 1 outer ramus which is much shorter than the inner ramus. <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (current study); Fantome and Orpheus Islands (current study); One Tree Island (current study).
description: Published as part of <i>Hughes, L. E. &amp; Lowry, J. K., 2009, Oedicerotidae *, pp. 746-758 in Zootaxa 2260 (1)</i> on pages 747-750, DOI: 10.11646/zootaxa.2260.1.40, http://zenodo.org/record/5307044
description: {"references": ["Ledoyer, M. (1984) Les gammariens (Crustacea, Amphipoda) des herbiers de phanerogames marines de Nouvelle Caledonie (region de Noumea). Memoires du Museum National d'Histoire Naturelle, Series A, Zoology, 129, 1 - 113."]}