Ampithoe cookana Peart 2007
Creators: name: Hughes, L. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ampithoidae
Ampithoe
Ampithoe cookana

description: <i>Ampithoe cookana</i> Peart, 2007 (Figs 1, 2) <i>Ampithoe cookana</i> Peart, 2007b: 13, figs. 7–10 (key). <b>Material examined.</b> 3 unsexed, AM P76242 (1974); 1 unsexed, AM P76244 (QLD 1975); 6 unsexed, AM P76243 (QLD 1978); 6 unsexed, AM P76241 (QLD 1999); 1 male ‘ A’ dissected, 7.0 mm, 3 slides, AM P76240 (QLD 2000); 1 dissected male ‘B’, 7.2 mm, 3 slides, AM P76239 (QLD 2000); 1 female dissected, 6.5 mm, 3 slides, AM P76238 (QLD 2000). <b>Type locality.</b> North ledge, Cook Island, New South Wales (28º11.44’S 153º34.67’E), living in <i>Chlorodesmis</i> sp., 12 m. <b>Description.</b> Based on ‘B’ male, 7.2 mm, AM P76239. <b>Head.</b> <i>Head</i> as long as deep. <i>Antennae 1–2</i> missing [in female paratype <i>antenna 1</i> longer than antenna 2; peduncular article 1 subequal to article 2 with 4 robust setae along posterior margin; flagellum 29 articles; accessory flagellum absent. <i>Antenna 2</i> peduncle with dense setose clumps on articles 3 to 5; article 4 subequal in length to article 5; flagellum 6+ articles]. <i>Mandible</i> molar well developed, triturating, accessory setal row with 5 serrate robust setae; palp 3–articulate, marginally setose; article 1 shorter than article 2, slender setae present; article 2 subequal in length to article 3. <i>Lower lip</i> outer plates notched, forming a medial excavation, lateral lobe distinctly longer than medial lobe; mandibular lobe with curved margins, rounded apically. <i>Maxilla 1</i> inner plate with more than 4 slender setae; palp article 2 slender. <i>Maxilliped</i> outer plate with row of large robust setae along medial margin. <b>Pereon.</b> <i>Coxae 1–4</i> deeper than broad. <i>Gnathopod 1</i> smaller than gnathopod 2; coxa subequal to coxa 2, anteroventrally produced, anterior margin straight, anteroventral corner narrowly rounded; basis shorter than coxa, anterodistal lobe rounded, with 1 slender seta; merus posterodistal lobe acute; carpus about 1.5 x as long as broad, shorter than propodus, anterior margin with 1 robust seta, posterior margin straight; propodus narrow, subrectangular; palm transverse acute, convex, with rounded posterodistal corner, with 1 robust seta defining palm; dactylus slightly overreaching palm, inner margin crenate. <i>Gnathopod 2</i> coxa without long, plumose setal fringe on ventral margin, basis with medial fringe of long, slender setae, anterodistal corner with 4 robust setae; merus margin without lobe; carpus shorter than propodus, subtriangular, with 7 robust setae along anterior margin; propodus broad, less than 1.5 x as long as broad, subrectangular, not produced into an anterodistally setose lobe; palm acute, excavate, with posterodistal tooth of medium length (length 2 x breadth), apically subacute, without palm defining robust seta; dactylus equal in length to palm, tapering evenly, apically acute, inner margin crenate. <i>Pereopods 3–4</i> basis slightly expanded; merus longer than carpus. <i>Pereopods 5–7</i> simple. <i>Pereopod 6</i> basis posterior margin sinusoidal, with several marginal robust setae; distal articles slender; propodus not expanded distally, with 2 anterodistal striated robust setae; dactylus slightly curved. <b>Pleon.</b> <i>Epimera 2–3</i> posteroventral corner broadly rounded. <i>Uropod 1</i> peduncle with more than 13 robust setae, with short fringe of slender setae (less than 0.5 x length of peduncle), distoventral spine absent; rami subequal in length; outer ramus slender, length about 5–6 x as long as broad, with 9 marginal robust setae. <i>Uropod 2</i> peduncle with 2 robust setae; outer ramus with 8 lateral robust setae; inner ramus with 9 lateral robust setae. <i>Uropod 3</i> peduncle longer than broad, more than 2 x length of rami, without marginal slender setae, with 5 distal robust setae, with 5 distal slender setae; outer ramus with 2 large recurved distal robust setae, without lateral robust or slender setae; inner ramus with 6 distal slender setae, without lateral robust setae. <i>Telson</i> subtriangular, apically rounded, with small apical cusp on each distolateral corner, with 3 pair of lateral and1 pair of apical slender setae, and with 2 pair of lateral and 1 pair of apical plumose setae. <b>Female</b> (sexually dimorphic characters). Based on female, 6.5 mm, AM P76238. <i>Gnathopod 1</i> subequal in size to gnathopod 2; coxa anterior margin slightly concave, anteroventral corner rounded; basis with 3 slender setae; carpus anterior margin with slender setae; palm subacute, straight. <i>Gnathopod 2</i> basis anterodistal corner with 2 slender setae; palm entire, with rounded posterodistal corner, with 1 robust seta defining palm. <b>Habitat.</b> <i>Chlorodesmis</i> sp., dead <i>Acropora</i> sp. coral with epiphytes. <b>Remarks.</b> <i>Ampithoe cookana</i> belongs to a group of <i>Ampithoe</i> species with a posterodistal tooth defining the palm of male gnathopod 2. This group includes: <i>A. akuolaka</i> J.L. Barnard, 1970; <i>A. katae</i> Peart, 2007b; <i>A. platycera</i> Sivaprakasam, 1971, <i>A. rachanoi</i> Peart, 2002, <i>A. waialua</i> J.L. Barnard, 1970 and the species complex associated with <i>A. ramondi</i> Audouin, 1826. <i>Ampithoe cookana</i> may be distinguished from these species by the male gnathopod 2 propodus which lacks the anterodistal hood and the gnathopod 1 palm which is convex. Within the GBR <i>Ampithoe cookana</i> is similar to <i>A. katae,</i> however <i>A. katae</i> has an anterodistal hood on gnathopod 2 and is more setose along the anterodistal propodus margin. <b>Distribution.</b> <i>Australia</i>. New South Wales: Cook Island (Peart 2007b). Queensland: One Tree Island (current study).
description: Published as part of <i>Hughes, L. E. &amp; Lowry, J. K., 2009, Ampithoidae *, pp. 153-219 in Zootaxa 2260 (1)</i> on pages 154-157, DOI: 10.11646/zootaxa.2260.1.8, http://zenodo.org/record/5322208
description: {"references": ["Peart, R. A. (2007 b) A review of Australian species of Ampithoe Leach, 1814 (Crustacea: Amphipoda: Ampithoidae) with descriptions of seventeen new species. Zootaxa, 1566, 1 - 95.", "Barnard, J. L. (1970) Sublittoral Gammaridea (Amphipoda) of the Hawaiian Islands. Smithsonian Contributions to Zoology 34, 1 - 286.", "Sivaprakasam, T. E. (1971) Amphipods of the family Ampithoidae from the Madras Coast. Journal of the Marine Biological Association of India, 12 (1 / 2), 64 - 80.", "Peart, R. A. (2002) New species of Ampithoidae (Crustacea, Amphipoda, Corophioidea) from the eastern Andaman Sea. Phuket Marine Biological Center Special Publication, 23 (1), 229 - 252.", "Audouin, V. (1826) Explication sommaire des planches de crustaces de l'Egypte et de la Syrie, publiees par Jules-Cesar Savigny, membre de l'Institut; offrant un expose des caracteres naturels des genres, avec la distinction des especes. Description de l'Egypte, Histoire Naturelle 1, 77 - 98."]}