A new species of Foza Reed & Cumberlidge, 2006 from northern Madagascar (Decapoda, Brachyura, Potamoidea, Potamonautidae), with a redescription of F. goudoti (H. Milne Edwards, 1853) comb. n., and comments on Skelosophusa prolixa Ng & Takeda, 1994 Author Cumberlidge, Neil urn:lsid:zoobank.org:author:&urn:lsid:zoobank.org:author: Northern Michigan University ,, Author Meyer, Kristin Northern Michigan University, Marquette ,, text ZooKeys 2009 2009-08-26 18 18 77 89 journal article 10.3897/zookeys.18.102 d5fdc6f0-0c09-4e68-8239-28ba1c61693f 1313–2970 576496 9A407E72-AFDF-4997-AD04-D9FDAA54C3F3 Foza goudoti ( H. Milne Edwards, 1853 ) , comb. n. Thelphusa goudoti H. Milne Edwards, 1853: 212 . A. Milne-Edwards 1869: 172 ; 1887: 135. Telphusa goudoti . – De Man 1892: 235 . Potamon goudoti .– De Man 1898: 434 . Potamon ( Potamon ) goudoti . – Rathbun, 1904: 305 , 306. Balss 1929: 355 . Potamon ( Geothelphusa ) methueni Calman, 1913: 920 . Bottia goudoti . – Pretzmann 1961: 164 . Gecarcinautes goudoti . – Bott 1965: 338 , 339. Cumberlidge 1997: 585 ; 1998: 209 . Hydrothelphusa goudoti . – Cumberlidge and Sternberg 2002: 56–59 . Ng et al., 2008: 169 . Type locality. Madagascar . Thelphusa goudoti : Madagascar , road between Bombetok and Tananarive. Potamon ( Geothelphusa ) methueni : Imerimandrosa. Type material. Adult male (CW 45.3, CL 34.4, CH 20.7, FW 10.7), adult female (CW 40.5, CL 32.1, CH 17.0, FW 10.0), 1987, purchased live in market in Antananarivo by N. Cumberlidge ( NMU NC 1987 ) ; adult male (CW 38.0, CL 28.1, CH 15.1, FW 10.2), adult male (CW 34.4, CL 27.5, CH 14.5, FW 8.4), adult female (CW 38.2, CL 33.1, CH 17.0, FW 9.5), adult female (CW 32.0, CL 25.1, CH 13.6, FW 8.2), from a lake near Antananarivo, coll. H. Morioka ( ZRC 2000.2303 ) . Diagnosis . Frontal margin of carapace relatively narrow (FW/CW 0.25), sharply deflexed. Epibranchial tooth small, positioned forward close to exorbital tooth. Epigastric, postorbital crests fused forming long horizontal postfrontal crest. Anterolateral margin posterior to epibranchial tooth raised, granular; anterolateral region smooth with striae on posterolateral margin. Pterygostomial region of carapace sidewall lacking setae. Subhepatic region smooth, granules in suborbital and pterygostomial regions. Sternal sulcus s3/s4 complete, v-shaped. Terminal article of GO1 with medial flap near junction. Terminal article of GO2 long, not curving inward distally. Comparisons . Cumberlidge and Sternberg (2002) assigned T. goudoti to Hydrothelphusa on the basis of its bilobed mandibular palp, but commented on the differences in a number of other characters of the carapace between this species and the others included in that genus. For example, the exorbital and epibranchial teeth of F. goudoti are both low and blunt and positioned close together, and the carapace is very wide (CW/FW 3.9) and highly arched ( CH /FW 1.6). In the other species of Hydrothelphsua these teeth are large and well spaced, and the carapace is not noticeably widened or inflated ( Cumberlidge and Sternberg, 2002 ). Th is taxon is transferred here to the genus Foza because it shares a number of important taxonomic characters with both F. raimundi and F. ambohitra ( Table 1 ).