Pagurotanais largoensis ( McSweeney 1982 )

Abarca-Ávila, Mónica Mariel, Herrera-Dorantes, María Teresa, Winfield, Ignacio & Ardisson, Pedro-Luis, 2019, Updated checklist and identification key of benthic tanaidaceans (Crustacea Peracarida) of the sublittoral zone of the northern Yucatan Peninsula, Mexico, Zootaxa 4711 (1), pp. 51-76 : 61-62

♦ Pagurotanais largoensis ( McSweeney 1982)

( Fig. 3 G–H)

Examined material. TA: 472 individuals. CNCR 34806 . Tr-Loc: M50- Chabihau, Yucatan , Mexico 21°22’4.329’’N 89°4’13.659’’W, 41 ♀, three ♀ o, two ♀ m, nine ♂, five juv, five man., 20 May 2005, 27 November 2005, 12 March 2006, coll. AV, SP ; Tr-Loc : M51- Santa Clara , Yucatan, Mexico 21°23’41.709’’N 88°53’21.159’’W, 132 ♀, seven ♀ o, three ♀ m, 26 ♂, 17 juv, 25 man., 20 May 2005, 27 November 2005, 12 March 2006, coll. AV, SP ; Tr-Loc : M52- Dzilam , Yucatan, Mexico 21°25’57.859’’N 88°44’7.216’’W, 25 ♀, five ♀ o, three ♀ m, six ♂, one juv, 15 May 2005, 13 November 2005, 13 March 2006, coll. AV, SP ; Tr-Loc : M54- Dzilam , Yucatan, Mexico 21°32’35.659’’N 88°29’57.616’’W, 48 ♀, one ♀ o, two ♂, nine juv, eight man., 15 May 2005, 13 November 2005, 13 March 2006, coll. AV, SP ; Tr-Loc : M55- Dzilam , Yucatan, Mexico 21°34’3.9’’N 88°22’39.608’’W, 47 ♀, two ♀ o, two ♀ m, ten ♂, nine juv, 18 man., 15 May 2005, 13 November 2005, 13 March 2006, coll. AV, SP ; Tr-Loc : M56- San Felipe , Yucatan, Mexico 21°34’32.739’’N 88°14’24.248’’W, one ♀, 16 May 2005, 12 November 2005, 18 March 2006, coll. AV, SP ; collected at depths of 0.2–2 m, on coarse sand, medium sand, fine sand, and very fine sand, with Caulerpa , H. wrightii , Syringodium and T. testudinum . Individuals were found inhabit gastropod shells identified as Cerithium eburneum Bruguière , Eulithidium affine C. B. Adams , Stellatoma stellata (Stearns) and Zebina browniana d’Orbigny ( Fig. 3H )

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Local distribution. ( Table 1 , Fig. 2 ).

Geographical distribution. GoM: Monroe Country, Key Largo, Florida; Caribbean Sea: Puerto Morelos Reef National Park , Quintana Roo .

Recognition characters. Body asymmetrical; rostrum pointed with crenulated margin; dorsal surface of carapace, first joint of antennular peduncle and chelipeds finely granulate; chelipeds unequal. Male right cheliped greatly enlarged than in female.

Remarks. This species has its geographical range extended to the southeastern portion of the GoM ( Mexico). It occurs the zone between 0 and 100 m perpendicular to the shoreline. It inhabits alga turf Yuzurua poiteaui (J.V.Lamouroux) Martin-Lescanne and among seagrasses ( T. testudinum ); it is also common to find it climbing in mounds formed by the calcareous red algae Jania rubens (Linnaeus) J.V.Lamouroux , in the coral Porites divaricata Le Sueur , under rocks, sponges, gravel and coarse sand, at depths 0.1 to 1.5 m. It is a detritivorous species. The species of Pagurapseudidae family mainly inhabits small gastropod shells which identity usually is unknown. The records of the shell’s identity, where known, was tabulated by Bird & Webber (2015) where, for instance, they mentioned that Macrolabrum maui Bird & Webber, 2015 , a New Zealand species, inhabits the shells of Eatoniella Dall , Merelina Iredale and Pisinna Monterosato.

References. McSweeney (1982); Messing (1983); Heard et al. (2004); Heard & Anderson (2009); Bird & Webber (2015);

Winfield et al. (2017).

Figures

FIGURE 2. Diversity, abundance, and distribution of tanaidaceans of the sublittoral zone of the northern Yucatan Peninsula.

FIGURE 3. Tanaidaceans species of the sublittoral zone of the northern Yucatan Peninsula, suborder Apseudomorpha. (A) Mesokalliapseudes macsweenyi ♂; (B) M. macsweenyi ♀; (C) Psammokalliapseudes granulosus ♂; (D) P. granulosus ♀; (E) Calozodion wadei ♂; (F) C. wadei ♀; (G) Pagurotanais largoensis ♂; (H) Shells that P. largoensis inhabits: upper left, Eulithidium affine; upper right, Zebina browniana; lower left, Cerithium eburneum; lower right, Stellatoma stellata.