Hermit crabs from Brazil: Family Diogenidae (Crustacea: Decapoda: Paguroidea), except Paguristes Author Nucci, Paulo Ricardo Author Melo, Gustavo Augusto Schmidt De text Zootaxa 2015 3947 3 327 346 journal article 10.11646/zootaxa.3947.3.2 6173bd73-5471-4c1e-a758-5481ffbd97b5 1175-5326 240452 4BEA9B2D-E883-43B5-AE74-1EBBD0D4D684 Isocheles sawayai Forest &Saint Laurent, 1968 ( Figs 3 D, 6F) Isocheles wurdemanni .— Moreira, 1906 : 23 , [unnumbered figure].—Rodrigues da Costa, 1962 : 1 , [unnumbered figure] [non Isocheles wurdemanni Stimpson, 1859 : 85 ]. Isocheles sawayai Forest & Saint Laurent, 1968 : 107 , figs 62, 63, 68, 69.— Negreiros-Fransozo & Hebling, 1983 : 41 , figs 1– 12.— Coelho & Ramos-Porto, 1986 : 52 .— Rieger, 1998 : 422 .— Melo, 1999 : 66 , fig. 22.—McLaughlin et al ., 2010: 22. Material examined . Brazil : Alagoas—EO-7, 2 spec. (MZUSP-6818); EO-8, 1 spec. (MZUSP-6845); EO-22, 2 spec. (MZUSP-6848). São Paulo—Ubatuba, Praia Itaguá, 1 spec. (MZUSP-4594); 1 spec. (MZUSP-4592); 9 spec. (MZUSP-4599); 14 spec. (MZUSP-4598); 12 spec. (MZUSP-4597); Ilha de São Sebastião, 2 spec. (MZUSP-4591); Praia Siriúba, 1 spec. (MZUSP-8847); São Sebastião, Praia Araçá, 1 spec. (MZUSP-8850); Praia Barequeçaba, 2 spec. (MZUSP-12998); 7 spec. (MZUSP-8844); 3 spec. (MZUSP-8843); 5 spec. (MZUSP- 8842); Guarujá, Praia Pernambuco, 1 spec. (MZUSP-7289); Santos, 7 spec. (MZUSP-13142); Praia José Menino, 26 spec. (MZUSP-7045); São Vicente , 1 spec. (MZUSP-4595); 15 spec. (MZUSP-600); Itanhaém, Praia Suarão, 1 spec. (MZUSP-7168). Diagnosis . Shield slightly longer than broad, with transversal granulated saliencies. Rostrum short, triangular, not exceeding lateral projections. Antennular peduncle slightly overreaching cornea. Antennal acicle with 5 or 6 teeth long and acute. Left cheliped slightly stronger than right; dorsal ridge of merus armed with strong spinose teeth distally; dorsolateral margin of carpus with row of strong acute teeth with corneous tip, higher than the width of the base. Dactyls of first ambulatory legs 1.5 times longer than propodus; dorsal face of propodus with 2 parallel rows of spinose corneous teeth, those of the inner row, stronger and more spaced. Distribution . Western Atlantic—Venezuela and Brazil (from Ceará to Santa Catarina). Remarks . Isocheles sawayai is very close to I. wurdemanni (not recorded in Brazil ), but the two species can be distinguished by several characters: antennal scale of I. sawayai has 5 or 6 long and acute teeth, but in I. wurdemanni , the antennal scale has 7–9 very short and slightly acute teeth; in I. sawayai the dorsolateral margin of the carpus of the left cheliped has a row of strong acute teeth with corneous tips, higher than the width of the base, whereas in I. wurdemanni , this row has teeth with the base wider than the height; the left cheliped has the lateral margin convex in I. wurdemanni and almost completely straight in I. sawayai .