Dardanus arrosor Herbst 1796
Creators: name: De Matos-Pita, Susana S.
name: Ramil, Fran
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Diogenidae
Dardanus
Dardanus arrosor

description: Dardanus arrosor (Herbst, 1796)
(Fig. 5)
Cancer arrosor Herbst 1796: 170, pl. 43 fig. 1.
Pagurus arrosor.— Stebbing, 1908: 22 (lit.).— Barnard, 1950: 423, fig. 79a.
Dardanus arrosor.— Schmitt, 1926: 45, fig. 69B, E, H (comp. D. pectinatus)— Forest, 1955: 90, fig. 19.— Macpherson, 1983: 13 (Namibia, 117 m).— Ingle, 1993: 55, figs. 17–20 (lit.).— García Raso 1996: 738 (Ibero-Moroccan Gulf, 140–524 m).
Material examined. MU86, 91– 103 m, (1); MU120, 109– 105 m, (5); MU124, 97– 85 m, (1); MU136, 103– 112 m, (2); MU137, 81– 84 m, (3); MU139, 96– 97 m, (3); MU148, 215– 245 m, (2); MU149, 93– 146 m, (1); MU156, 107– 102 m, (1); MU158, 80– 98 m, (2); MU161, 89– 92 m, (1); MU171, 105– 100 m, (1); MU173, 314– 540 m, (1); MU183, 138– 177 m, (1); MU240, 106– 108 m, (1); MU 266, 103 m, (1); MUBV 19, 306 m, (6); MUBV 20, 155 m, (2); MUBV 21, 107– 109 m, (15); MUBV 22, 300 m, (1).
Males: 2.62–16.54 mm, females: 2.72–11.12 mm, ovigerous females: 3.83–5.55 mm.
Habitat. Ubiquitous eurybathic species distributed from coastal detritic bottoms to bathyal muds (d’Udekem d’Acoz 1999). This species was reported in muddy and sandy-mud bottoms with Isidella and Funiculina off southern Morocco; in muddy coastal shell detritic bottoms with Veretillum off Western Sahara and on mud and sandy mud bottoms in the Banc d’Arguin (Maurin 1968). Also recorded on ‘sand of shell’, ‘shell remains’ and ‘shell remains Foram.’ off N Morocco (García Raso 1996) and mainly on muddy bottoms off Namibia (Macpherson 1983).
This hermit crab was found inhabiting shells of Argobuccinum costatum Born, A. giganteum Lam., Calliostoma granulatum Born, Charonia nodifera Lam., Dolium galea Linné [= Tonna galea (Linnaeus, 1758)], Fussus sp, Mesalia opalina Adams & Reeve, Murex cornutus Linné, Nassa sp., Natica fulminea Gmel., Sveltia lyrata Brocchi and ‘ Xenophora senegalensis P. Fisher (= mediterranea Tiber)’ (Forest 1955).
The species was reported associated with many different organisms compiled by Williams and McDermott (2004), to which Schuchert (2008) added the hydrozoan species Hydractinia pruvoti Motz-Kossowska, 1905 (= Podocoryna pruvoti).
Our material was collected from sand and sandy mud bottoms, inhabiting shells of Ranella olearium (Linnaeus, 1758), Tonna galea (Linnaeus, 1758), Fusinus sp., Afer pseudofusinus Fraussen & Hadorn, 2000, Natica sp., Natica canariensis Odhner, 1932, Genota sp., Nassarius arcadioi Rolán & Hernández, 2005, Marginella sp., Persicula cingulata (Dillwyn, 1817), Bivetiella cancellata (Linnaeus, 1767), Clavatula sp., Xenophora crispa (König, 1825), Calliostoma sp. and Natica monodi Marche-Marchad, 1957. One specimen was found in a shelter of the sponge Suberites sp.
As epibionts over the shells we found the hydrozoan species Hydractinia sp., Mitrocomella polydiademata (Romanes, 1876) and Clytia paulensis (Vanhöffen, 1910), one sponge of the family Raspailiidae, the actiniarian Adamsia palliata (Fabricius, 1779), some bivalves of the family Anomiidae, some Serpulidae polychaetes and the bryozoans Hagiosynodos sp, and Hippoporidra picardi Gautier, 1962.
Distribution. Evenly distributed in the E Atlantic from the Bay of Biscay to South Africa, including the Azores, Madeira and Canary Islands and the Mediterranean Sea (d’Udekem d’Acoz 1999), but also reported in the Indo-Pacific, Japan, Taiwan and New Zealand (Asakura 2006; Yaldwyn & Webber 2011).
Subsequent records of this species fit well in this distribution (Maynou and Cartes 2000; Abelló et al. 2002; García Raso & Manjón-Cabeza 2002; Pipitone & Arculeo 2003; Ates et al. 2006; Fanelli et al. 2007; Pipitone & Vaccaro 2011; Muñoz et al. 2012).
For this species the reported depth range extends from 5–750 m (d’Udekem d’Acoz 1999) and our material was collected from 81–84 m to 314–540 m depth.
Remarks. Our specimens agree with those described by Ingle (1993). Faded specimens of Dardanus arrosor can be easily differentiated from D. pectinatus (Ortmann, 1892) by the longitudinal depression on left pereiopod 2 propodus lateral face present in D. pectinatus (Schmidtt 1926; Forest 1955).
description: Published as part of De Matos-Pita, Susana S. & Ramil, Fran, 2015, Hermit crabs (Decapoda: Crustacea) from deep Mauritanian waters (NW Africa) with the description of a new species, pp. 151-190 in Zootaxa 3926 (2) on pages 159-161, DOI: 10.11646/zootaxa.3926.2.1, http://zenodo.org/record/242192