Seba gruneri Yerman &amp; Coleman 2009, sp. nov.
Creators: name: Yerman, Michelle N.
name: Coleman, Charles Oliver
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Sebidae
Seba
Seba gruneri

description: <i>Seba gruneri</i> sp. nov. (Figs 1–3) <b>Type material.</b> Holotype, male, 3.9 mm, AM P71239, Horseshoe Reef, Lizard Island (14°41.21’S 145°26.49’E), sponge, large coral bommies surrounded by sand and rubble, by hand on scuba, 9 m, C. Serejo, 2 March 2005 (QLD 1760). Paratypes: 7 males from type locality; and 1 female, 2.5 mm, AM P71237, from type locality. <b>Other material examined.</b> 32 females, 5 juvenile males AM P71237 (QLD 1760); 1 male JDT/LIZ-19; 3 juveniles, 1 male JDT/LIZ-7. <b>Type locality.</b> Horseshoe Reef, Lizard Island, Queensland, Australia (14°41.21’S 145°26.49’E). <b>Etymology.</b> Named for the late Professor Dr. Hans Eckhard Gruner, the predecessor of COC at the Natural History Museum in Berlin, to acknowledge his valuable contributions to crustacean research. <b>Description.</b> Based on male holotype, 3.9 mm, AM P71239. <b>Head.</b> <i>Head</i> eyes apparently absent. <i>Antenna 1</i> peduncular article 1 subequal in length to article 2; article 2 length 2.9 x breadth. <i>Maxilla 1</i> palp 1-articulate. <i>Maxilla 2</i> with two plates. <b>Pereon.</b> <i>Gnathopod 1</i> subchelate; larger than gnathopod 2; coxa with posteroventral corner rounded; propodus thumb absent, palm obtuse, sculptured; dactylus curved. <i>Gnathopod 2</i> chelate; ischium long, 3.3 x breadth; carpus not lobate, carpus more than 0.6 x length of propodus. <i>Pereopod 3</i> coxa with posteroventral corner subquadrate to rounded. <i>Pereopod 4</i> coxa with posteroventral lobe absent. <i>Pereopod 5</i> basis evenly expanded, margins subparallel; merus expanded, extending 75% along carpus. <i>Pereopod 6</i> basis evenly expanded, margins subparallel. <i>Pereopod 7</i> basis broadly expanded, posterior margin evenly convex; merus broadly expanded, extending past distal margin of carpus. <b>Pleon.</b> <i>Epimeron 2</i> posteroventral corner acutely produced. <i>Epimeron 3</i> posteroventral corner subquadrate. <i>Urosomites</i> 2–3 coalesced. <i>Uropod 1</i> peduncle subequal in length to uropod 2 peduncle; outer ramus subequal in length to inner ramus. <i>Uropod 2</i> outer ramus subequal in length to inner ramus. <i>Uropod 3</i> peduncle about half length of ramus. <i>Telson</i> longer than broad, lateral margins slightly convex. <b>Female</b> (sexually dimorphic characters). Based on paratype, female, 2.5 mm, AM P71237. <i>Antenna 1</i> peduncular article 2 length 2.5 x breadth. <i>Gnathopod 1</i> chelate; smooth, straight. <i>Pereopod 5</i> extending halfway along carpus. <i>Pereopod 7</i> merus expanded, extending about halfway along carpus. <b>Habitat.</b> Sponges on large coral bommies surrounded by sand and rubble. <b>Remarks.</b> Similar to <i>Seba gruneri</i> <b>sp. nov.</b>, there are a few sebid species that have a characteristically widened merus lobe that surpasses the distal margin of the carpus on pereopod 7 in the male sex. However, details of the morphology or combination of characters are different. <i>Seba aloe</i> Karaman, 1971, <i>Seba antarctica</i> Walker, 1907 and <i>Seba gloriosae</i> Ledoyer, 1986 have the same merus shape, but on pereopods 5–7 (vs on pereopod 7 only) and a finger like palm process creating a chelate gnathopod 1 (vs a subchelate, sculptured palm). Also similar is the material that Griffiths (1974, 1976) described from Southern Africa as <i>Seba saundersi</i>. This species has a ventrally strongly elongate merus lobe on pereopod 7 (weaker on pereopod 6) and a subchelate, though differently sculptured subchelate palm region. A similar merus lobe arrangement appears in <i>Seba subantarctica</i> Schellenberg, 1931, but this species has a clearly chelate gnathopod 1. <i>Seba chiltoni</i> Moore, 1987 and <i>Seba typica</i> (Chilton, 1884) in the descriptions by Ledoyer, 1978 and 1986 are very similar to the new species in the shape of the gnathopod 1 palm and the protrusion on the inner curvature of the dactylus, but compared to <i>Seba gruneri</i> <b>sp. nov.</b> the merus lobe on pereopod 7 is not longer than the distal carpus margin. <i>Seba robusta</i> Ortiz &amp; Lemaitre, 1997 has also a very similar palm morphology of gnathopod 1, however, the meral lobes are short and rather slender. <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (current study).
description: Published as part of <i>Yerman, Michelle N. &amp; Coleman, Charles Oliver, 2009, Sebidae *, pp. 861-871 in Zootaxa 2260 (1)</i> on pages 861-865, DOI: 10.11646/zootaxa.2260.1.48, http://zenodo.org/record/5309437
description: {"references": ["Karaman, G. S. (1971) Zum Problem der Seba - Arten: Seba aloe n. sp. und Seba armata (Chevreux) (Fam. Sebidae). - 35. Beitrag zur Kenntnis der Amphipoden. Memoria del Museo Civico di Storia Naturale Verona, 19, 73 - 90.", "Walker, A. O. (1907) Crustacea. III. Amphipoda. National Antarctic Expedition 1901 - 1904 \" Discovery \", 1 - 39. Walker, A. O. (1908) Amphipoda from the Auckland Islands. Annals and Magazine of Natural History, Series 8, 2 (7), 33 - 39.", "Ledoyer, M. (1986) Crustaces amphipodes gammariens. Familles des Haustoriidae a Vitjazianidae. Faune de Madagascar, 59, 599 - 1112.", "Griffiths, C. L. (1974) The Amphipoda of Southern Africa. Part 4. The Gammaridea and Caprellidea of the Cape Province east of Cape Agulhas. Annals of the South African Museum, 65, 251 - 336.", "Griffiths, C. L. (1976) Guide to the benthic marine amphipods of Southern Africa. Trustees of the South African Museum. Cape Town, 1 - 106.", "Schellenberg, A. (1931) Gammariden und Caprelliden des Magellangebietes, Sudgeorgien und der Westantarktis. Further zoological Results of the Swedish Antarctic Expedition 1901 - 1903, 2, 1 - 290.", "Moore, P. G. (1987) Taxonomic studies on Tasmanian phytal amphipods (Crustacea): the families Anamixidae, Leucothoidae and Sebidae. Journal of Natural History, 21, 239 - 262.", "Chilton, C. (1884) Additions to the sessile-eyed Crustacea of New Zealand. Transactions and Proceedings of the New Zealand Institute, 16, 249 - 265.", "Ledoyer, M. (1978) Amphipodes gammariens (Crustacea) des biotopes cavitaires organogenes recifaux de l'ile Maurice (Ocean Indien). The Mauritius Institute Bulletin, 8, 197 - 332.", "Ortiz, M. &amp; Lemaitre, R. (1997) Seven new amphipods (Crustacea: Peracarida: Gammaridea) from the Caribbean Coast of South America. Boletin de Investigaciones Marinas y Costeras, 26, 71 - 104."]}