Leucothoe eumilli White &amp; Thomas, 2009, sp. nov.
Creators: name: White, Kristine N.
name: Thomas, James Darwin
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Ericales
Ericaceae
Leucothoe
Leucothoe eumilli

description: <i>Leucothoe eumilli</i> sp. nov. (Figs 9, 10) <b>Type material.</b> Holotype, male, 2.2 mm, AM P 80177, Fantome Island (~ 18°39'S 146°30'E), pink ball sponge, 3 m, K. N. Klebba, 23 May 2004 (JDT / OPH 23). <b>Type locality.</b> Fantome Island, Queensland, Australia (~ 18°39'S 146°30'E). <b>Etymology.</b> After the native Manbarra Aboriginal word, ‘ <i>Eumilli</i> ’, meaning ‘Fantome Island’ and referring to the type locality. <b>Description.</b> Based on holotype, male, 2.2 mm, AM P80177. <b>Head.</b> <i>Head</i> length less than pereonite 1+2, anterior margin with cusp, without serrations or teeth, anterodistal margin rounded, ventral cephalic keel subquadrate, rostrum small to medium; eyes with 10 or more ocelli, round. <i>Antenna 1</i> 0.3 x body length; flagellum 7-articulate, peduncle width less than 2 x article 2. <i>Antenna 2</i> 0.3 x body length, shorter than antenna 1; flagellum 4-articulate. <i>Mandibles</i> lacking molars; palp 3- articulate, ratio of articles 1 <i>–</i> 3, 1.0:1.4:0.6, article 2 with 4 distal setae and 1 proximal seta, article 3 with 2 distal setae; incisors strongly dentate; left mandible lacinia mobilis large, strongly toothed, with 11 accessory setae; right mandible missing. <i>Upper</i> and <i>lower lips</i> and <i>maxillae 1</i> and <i>2</i> missing. <i>Maxilliped</i> inner plates fused, distal margin with v-shaped indentation, with short spines; outer plate smooth, reduced, reaching much less than half of palp article 1, with 2 distal setae and 1 distal spine; palp 4-articulate, article 4 wide, slightly recurved. <b>Pereon.</b> <i>Coxae 1–4</i> relative widths 1.0:1.3:0.7:1.4. <i>Gnathopod 1</i> coxa smooth, bare, anterodistal corner produced, broadly rounded, distal margin rounded, posterodistal margin excavate, facial setae absent; basis constricted proximally, anterior and posterior margins bare; ischium with 1 posterodistal seta; carpus and propodus distally tapered, carpus length 25 x width, proximal margin smooth, distal margin bare; propodus straight, palm serrate with 3 distal setae; dactylus smooth, reaching 0.5 x propodus length. <i>Gnathopod 2</i> coxa length subequal to width, much wider than coxa 3, smooth, bare, anterodistally rounded, distal margin evenly rounded, posterior margin rounded, facial setae absent; basis slightly widened distally, without tubercles or serrations, anterior margin with 3 setae, posterior margin with 1 seta; ischium with 2 facial and 1 posterodistal seta; carpus 0.6 x propodus length, straight, distally truncate, anterior margin smooth; propodus posterior margin without spines/serrations, with 1 mediofacial setal row displaced to midline, reaching 0.4 x propodus length, 1 row of 3 submarginal setae, palm convex with 2 minor projections; dactylus recurved, proximal margin smooth, anterior margin distally acute, reaching 0.7 x propodus length. <i>Pereopod 3</i> coxa length 1.3 x width, anterodistal corner over-riding distal face of coxa 2, not extending below it, smooth, bare, anterior margin straight, distal margin oblique, posterior margin evenly rounded, facial setae absent. <i>Pereopod 4</i> coxa smooth, bare, anterior margin evenly rounded, distal margin evenly rounded, posterior margin mildly excavate, facial setae absent. <i>Pereopods 5–7</i> coxa facial setae absent; basis width length ratios 1:1.3, 1:1.2, 1:1.2, posterior margins smooth, bare. <b>Pleon.</b> <i>Epimeron 1</i> with 1 ventral seta. <i>Epimeron 2</i> with 3 ventral setae. <i>Epimeron</i> 3 bare, posteroventral margin produced. <i>Uropods 1–3</i> relative lengths 1.0:0.7:1.1; inner and outer ramus lined with short marginal setae, with robust setae. <i>Uropod 1+3</i> peduncle subequal to inner ramus length; outer and inner ramus subequal in length. <i>Uropod 2</i> peduncle 1.3 x inner ramus length; outer ramus 0.8 x inner ramus length. <i>Telson</i> 1.8 x longer than wide, apex bidentate. <b>Female</b> (sexually dimorphic characters). Unknown. <b>Habitat.</b> In pink ball sponge on patch reef. <b>Remarks.</b> <i>Leucothoe eumilli</i> <b>sp. nov.</b> is distinct in its anterior head cusp, its distally truncate gnathopod 2 carpus and its extremely short mediofacial setal row. A bidentate telson is also found in <i>L</i>. <i>basilobata</i>, <i>L</i>. <i>cheiriserra</i>, <i>L</i>. commensalis, <i>Leucothoe ctenochasma</i> Moore, 1987, <i>Leucothoe diemenensis</i> Myers, 1985 c, <i>Leucothoe laticoxa</i> Ledoyer, 1978 a and <i>Leucothoe sparsa</i> <b>sp. nov.</b> <b>Distribution.</b> <i>Australia</i>. Queensland: Fantome Island (current study).
description: Published as part of <i>White, Kristine N. &amp; Thomas, James Darwin, 2009, Leucothoidae *, pp. 494-555 in Zootaxa 2260 (1)</i> on pages 508-511, DOI: 10.11646/zootaxa.2260.1.29, http://zenodo.org/record/5323471
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