Calocarides coronatus ( Trybom, 1904 )

De Matos-Pita, Susana S. & Ramil, Fran, 2015, Additions to thalassinidean fauna (Crustacea: Decapoda) off Mauritania (NW Africa) with the description of a new genus and a new species, Zootaxa 4020 (3), pp. 571-587 : 573-575

Calocarides coronatus ( Trybom, 1904)

Euconaxius coronatus Trybom, 1904: 384 , Pl. 20 figs. 1–10, 13, 14, Pl. 21, figs. 1–8. Calocarides coronatus .—Sakai & de Saint Laurent, 1989: 80 (In part, see remarks).— Sakai, 2011: 89 (references and synonymies)

Material examined. Expedition Maurit1011: Stn MU276, Mauritania, off Saint Louis (16°18´56″–16°21´53″N, 16°53´25″–16°52´41″W), 637– 562 m depth, muddy fine sand, commercial trawl, 7.XII.2010; 1 male TL/CL: 35.46/ 12.67 mm, both right pereiopods 3 and 4 missing. Stn MUDR 09, Mauritania, canyon area off Banc d’Arguin (20°14´36″N, 17°40´10″W), 525-m depth, muddy coral rubble, rock dredge, 19.XI.2010; one juvenile TL/CL: 20.14/ 7.39 mm, both pereiopods 1 and 3, and right pereiopod 5 missing. Stn MUDR 10, Mauritania, canyon area off Banc d’Arguin (19°50´01″N, 17°37´03″W), 520-m depth, mud with coral rubble, rock dredge, 22.XI.2010; one male TL/CL: 28.28/ 10.27 mm, left pereiopods 1–3 missing.

Infraorder ‘Sakai et al. ’ ‘Dworschak et al. ’ Infraorder

families families

Thalassinidea Laomediidae Axianassidae 1 Gebiidea

Laomediidae

Thalassinidae Thalassinidae

Upogebiidae Upogebiidae

Callianassidea Axiidae Axiidae Axiidea

Calocarididae 2

Coralaxiidae2

Eiconaxiidae 2

Eiconaxiopsididae 2

Anacalliacidae 3 Callianassidae

Bathycalliacidae3

Callianassidae 3

Callianopsidae

Eucalliacidae3

Lipkecallianassidae3

Callianideidae Callianideidae

Thomassiniidae 4

Ctenochelidae Ctenochelidae

Ctenocheloidae5

Gourretiidae 5

Pseudogourretiidae5

Meticonaxiidae6 Micheleidae

Micheleidae

Strahlaxiidae Strahlaxiidae

1. Dworschak et al. (2012) kept this family separate, as originally designated by Schmitt (1924), although its single genus Axianassa was also placed in Laomediidae ( Poore 1994, among others).

2. Calocarididae and Eiconaxiidae were subsumed into Axiidea, while Coralaxiidae and Eiconaxiopsididae were not mentioned by Dworschak et al. (2012). Corallaxiidae was erected as an axiid subfamily by Sakai and de Saint Laurent (1989) and subfamilies were not considered in Dworschak et al. (2012). Eiconaxiopsididae was erected by Sakai (2011) to host the new genus Eiconaxiopsis , including the new species E. heinrichi and E. sibogae . Eiconaxiopsis sibogae was previously placed in Eiconaxiidae [as Eiconaxius sibogae (de Man, 1925)]. Notice here that Dworschak et al. (2012) ’s manuscript was conluded on 5 July 2010, long before Sakai’s work has been published.

3. None of these families were mentioned by Dworschak et al. (2012) and all of them were at first described as callianassid subfamilies ( Manning and Felder 1991; Sakai and Türkay 1999; Sakai 2005a).

4. Thomassiniidae was subsumed into Callianideidae by Dworschak et al. (2012).

5. Pseudogourretiidae was originally described as a subfamily within Gourretiidae (Sakai, 2005) , but this family was subsumed into Ctenochelidae by Dworschak et al. (2012). Ctenocheloidae was erected by Sakai (2011: 595) for the single species Ctenocheloides attenboroughi Anker, 2010 , which was originally placed in Ctenochelidae . Posteriorly, Komai (2013) described a new Ctenocheloides species, C. nomurai , but the author keep the genus in the family Ctenochelidae .

6. Meticonaxiidae was described as a subfamily under Callianideidae ( Sakai, 1992a) but was later transferred to Micheleidae ( Poore, 1994) .

Infraorder Family Maurit surveys thalassinidean species Family Infraorder

(‘Sakai et al. ’) (‘Dworschak et al. ’)

Callianassidea Axiidae Calocarides coronatus ( Trybom, 1904) Axiidae Axiidea

Ezaxius ferachevali n. gen. n. sp.

Calocarididae Calocaris macandreae Bell, 1846

Callianassidae Trypaea oblonga ( Le Loeuff & Intès, 1974) n. Callianassidae comb.

Habitat. Calocarides coronatus is previously reported living on bottoms of ‘shell remains Foram.’ ( García Raso 1996) and soft mud, at depths between 162 and 1200 m ( Cartes et al. 1994; d’Udekem d’Acoz 1999; Ngoc- Ho 2003). Our specimens were sampled on muddy fine sand and muddy coral rubble, at depths from 562 to 637 m.

Distribution. East Atlantic, from the north of Europe to tropical West Africa (at least to Mauritania; present work, see remarks) and the Mediterranean Sea (Sakai & de Saint Laurent 1989; Ngoc-Ho 2003).

Remarks. Calocarides coronatus has been found evenly distributed in the north of Europe ( Norway, Sweden, Denmark, North Sea) but is not reported from the British Isles ( Ngoc-Ho 2003). The same author corroborated the inclusion in this species of the small Mediterranean specimens reported by Cartes et al. (1994, Catalan Sea) and García Raso (1996, Alboran Sea), and also noted that the species was not recorded from South European Atlantic coasts. Ngoc-Ho (2003) also considered as doubtful the assignment to C. coronatus (for ‛geographical reasons’, Sakai and de Saint Laurent, 1989: 79) of the material previously identified as Calocarides longispinis ( McArdle, 1901) by Stebbing (1910: 368; as Calastacus longispinis ) from South Africa and by Macpherson (1983: 45, as Calastacus longispinis ; in part, see below) from Namibia.

Material from Table Mountain named as Calastacus longispinis [not C. longispinis McArdle, 1901 = Calocarides longispinis ( McArdle, 1901) ] by Stebbing (1910: 368), reported and figured later by Barnard [1950: 503, fig. 93 d-f; as Calocaris (Calastacus) longispinis ] and also listed by Kensley (1981: 30; as Calocaris longispinis ), was described as the new species Calocarides capensis by Kensley (1996). Namibian material (20°– 21°S) identified as Calastacus longispinis by Macpherson (1983: 45) was also described as the new species Calocarides macphersoni by Kensley (1996). Material sampled in South Namibia [26°S; Macpherson 1983: 45 as Calastacus longispinis ( McArdle, 1901) ], and included in Calocarides coronatus by Sakai & de Saint Laurent (1989: 80), was subsequently transferred to Calocarides capensis by Sakai (2011: 88).

Other C. coronatus material from the MNHN checked by Sakai & de Saint Laurent (1989) from Portugal and tropical West Africa is unfortunately missing from the MNHN collection (MNHN Direction des Collections- Invertébrés; personal communication) and, although the authors included some figures (Sakai & de Saint Laurent 1989: figs. 20A–D) of one of the African specimens, which can be attributed to C. coronatus , neither detailed description nor exact African locality were provided.

Our specimens concur with the descriptions, diagnosis and figures of Calocarides coronatus supplied by Trybom (1904), Kensley (1996) and Ngoc-Ho (2003). Some minor differences mainly concerning the relative length of the antennal acicle with regard to antennal peduncle and pereiopod 1 meri spinulation can be explained by differences in size, even among our specimens. Moreover, our specimens confirm the presence of C. coronatus in tropical West Africa and are the first ever recorded in Mauritanian waters.