Nebalia strausi Risso 1826
Creators: name: McCormack, Edward
name: Ashelby and David McGrath, Christopher W.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Leptostraca
Nebaliidae
Nebalia
Nebalia strausi

description: Nebalia strausi Risso, 1826
Material examined. Ireland. 1♂, 3♀, Kilkieran Bay, Co. Galway, 53°19.548’N 009°38.9165’W, 7.9 m, sandy gravel, 15.x.2010. 4♂, 4♀, Kingstown Bay, Co. Galway, 53°30.905’N 10°7.6979’W, 10 m, gravelly muddy sand, 16.x.2010. 3♀, Valentia Island, Co. Kerry, 51°53.819’N 10°18.786’W, 4 m, muddy sandy gravel, 16.ix.2010 (NMINH: 2016.1.5, 1♀). 1♀, Valentia Island, Co. Kerry, 51°53.2439’N 10°21.948’W, 6 m, maërl, 16.ix.2010 (NMINH: 2016.1.4, 1♀). 1♂, 5♀, Ahabeg, Bantry Bay, Co. Cork, at edge of stocked salmon farm cage located at 51°39.7302’N 009°45.1727’W, 20–23.4 m, mud with broken shell, 4.ix.2012 (JM:2014, 1♂, 4♀). 1♂ adult, Glinsk, Mulroy Bay, Co. Donegal, 55°12.1368’N 007°47.0682’W, 8–15 m, medium sand with both live and dead maërl, 14.viii.2012. 1♂ adult, Millstone, Mulroy Bay, Co. Donegal, 50 m from stocked salmon farm, 55°11.4205’N 007°45.388’W, 5–12.9 m, medium sand with maërl gravel, 15.viii.2012 (JM:2014, 1♂).
British and Irish Distribution. South-west, west, and north of Ireland (Co. Cork, Co. Kerry, Co. Galway and Co. Donegal) and Guernsey (Dahl, 1985) (Fig. 1A).
Distribution beyond the study area. Gulf of Naples, Italy (type locality), Eastern Atlantic, from the north-west coast of France to St. Helena (Dahl, 1985). Western Mediterranean (Dahl, 1985). Eastern Mediterranean (Koçak and Katagan, 2006; Koçak et al., 2007). Concarneau, Brittany, France (J.M.C. Holmes, pers. comm.).
Ecology. Coarse sediments, from gravel to coarse sand at depths of 12.7–15.2 m, Total Organic Matter (% TOM) 0.6–4.9 (Moreira et al., 2009a). Maërl, medium sand to mud at depths of 4–23.4 m, % TOM 2.92–18.93 (present study).
Remarks. Nebalia strausi is recorded for the first time from Irish waters. Records of N. strausi to date suggest a southerly distribution with the specimens from Mulroy Bay, Co. Donegal, representing the northernmost extent of its range. Features distinguishing N. strausi from other species of Nebalia within the North-East Atlantic include distally acute denticles on the posterior margin of pleonites 6 and 7, in conjunction with an antennular flagellum with more than 10 articles and the exopod of the 2nd maxilla barely extending past the proximal article of the endopod.However, research (Moreira et al., 2004; Koçak et al., 2010) has shown that specimens of N. strausi from different localities can exhibit variation in a number of characters including the shape of the anal scales and the denticles of the posterior border of pleonites 6–7. Koçak et al.(2011) suggested that the existence of cryptic species cannot be ruled out for N. strausi.
description: Published as part of McCormack, Edward & Ashelby and David McGrath, Christopher W., 2016, A review of the Leptostraca of the British Isles with discussion of the genus Sarsinebalia Dahl, pp. 1-19 in Nauplius (e 2016006) (e 2016006) 24 on page 3, DOI: 10.1590/2358-2936e2016006, http://zenodo.org/record/14665559