Malagasya goodmani (Cumberlidge, Boyko & Harvey, 2002) Cumberlidge & Sternberg, 2002

Cumberlidge, Neil & Sternberg, Richard V., 2002, The freshwater crabs of Madagascar (Crustacea, Decapoda, Potamoidea), Zoosystema 24 (1), pp. 41-79 : 64-65

Malagasya goodmani

(Cumberlidge, Boyko & Harvey, 2002) n. comb. ( Figs 1F ; 3F ; 4F ; 5F ; 6F ; 7E, F ; 8J ; 11G ) Gecarcinautes cf. antongilensis antongilensis — Harvey & Boyko 1998: 145,146.

Gecarcinautes goodmani Cumberlidge, Boyko & Harvey, 2002: 71-76 , figs 4-6.

TYPEMATERIAL. — Madagascar. Station forestière de Tampolo, Province de Toamasina, Madagascar, 17°17’2”S, 49°24’5”E, 1 ad. /subad. holotype of Gecarcinautes goodmani Cumberlidge, Boyko & Harvey, 2002 cw 23.0, cl 17.6, ch 6.8, fw 4.7 mm (FMNH 4651). — 1 ad. /subad., paratype cw 23.5, cl 18.4, ch 8.0, fw 5.4 mm, 1 juv., paratype cw 12.6, cl 10.6, ch 4.2, fw 3.1 mm (FMNH 4651). — 1 subad., paratype cl 16.5 mm (AMNH 17530). — 4.IV.1997, coll. S. M. Goodman, 1 ad. ovigerous, paratype cl 18.1 mm (AMNH 17530a).

TYPELOCALITY. — Madagascar. Station forestière de Tampolo, Province de Toamasina, 17°17’2”S, 49°24’5”E, 10 m elevation, in leaf axils of Pandanus .

DISTRIBUTION. — Madagascar ( Fig. 11G ). Known only from the Station forestière de Tampolo, Province de Toamasina. Malagasya goodmani n. comb. is found at different elevations, always in association with Pandanus leaf axils.

DIAGNOSIS. — Suborbital, pterygostomial regions of carapace sidewall smooth; subhepatic region finely granulated; ischium of third maxilliped smooth (vertical sulcus either faint or absent). Third sternal sulcus s3/s4 deep at edges, sides angled backward, middle horizontal, completely crossing sternum; outer margins of dactylus, propodus of p2 to p5 with thick covering of velvet-like hair.

DESCRIPTION

See Cumberlidge et al. (2002).

Size

The adult size range is from cw 24 mm. The carapace proportions are given in Table 3.

REMARKS

This taxon is referred to Malagasya n. gen. due to the synonymy of the genus Gecarcinautes (see above).

Malagasya goodmani n. comb. can be distinguished from M. antongilensis n. comb. as follows: the epigastric crests of M. goodmani n. comb. are separated by a narrow midgroove, whereas the midgroove of M. antongilensis n. comb. is wide; the inner margin of the propodus of pereiopods p2 to p5 of G. goodmani is smooth (with tufts of hair), whereas these margins in M. antongilensis n. comb. are distinctly toothed; and the outer margins of the dactylus and propodus of p2 to p5 of M. goodmani n. comb. have a thick covering of velvet-like hair, whereas this hair is lacking in M. antongilensis n. comb. In addition, the propodus of pereiopod p5 of G. goodmani is short and broad, whereas that of M. antongilensis n. comb. is elongated and slim; the suborbital and pterygostomial regions of the carapace sidewall of M. goodmani n. comb. are smooth, whereas those of M. antongilensis n. comb. are finely granulated with a field of sparse hairs; the ischium of the third maxilliped of M. goodmani n. comb. is smooth, whereas in M. antongilensis n. comb. the vertical sulcus of the ischium is deep; and the sternal sulcus s3/s4 of M. goodmani n. comb. is V-shaped, whereas in M. antongilensis n. comb. this sulcus is horizontal.

Figures

FIG. 1. — Dorsal view of the carapace of adult males of Madagascan freshwater crabs; A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Malagasya antongilensis (Rathbun, 1905) n. comb.; F, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb., holotype (FMNH 4651). Scale bar: A, 10.5 mm; B, 14.4 mm; C, 14.1 mm; D, 12.6 mm; E, 8.9 mm; F, 6.4 mm.

FIG. 3. — Inferior view of the sternum of adult males of Madagascan freshwater crabs; A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Malagasya antongilensis (Rathbun, 1905) n. comb.; F, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb., G, Madagapotamon humberti Bott, 1965; H, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; I, Boreas uglowi n. gen., n. sp. Scale bar: A, 11.7 mm; B, 17.2 mm; C, 15.9 mm; D, 14.5 mm; E, 10.2 mm; F, 7 mm; G, 9.6 mm; H, 6.4 mm; I, 9.1 mm.

FIG. 4. — Left mandible of Madagascan freshwater crabs, frontal view showing the palp (J, K based on Ng & Takeda 1994); A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Malagasya antongilensis (Rathbun, 1905) n. comb.; F, M. goodmani (Cumberlidge, Boyko & Harvey, 2000) n. comb.; G, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2000; H, Boreas uglowi n. gen., n. sp.; I, Skeleosophusa gollhardi (Bott, 1965); J, S. prolixa Ng & Takeda, 1994; K, S. eumeces Ng & Takeda, 1994; L, Madagapotamon humberti Bott, 1965. Scale bar: A-I, K, L, 1.0 mm; J, 1.25 mm.

FIG. 5. — Left third maxilliped of Madagascan freshwater crabs, frontal view (J, K based on Ng & Takeda 1994); A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Malagasya antongilensis (Rathbun, 1905) n. comb.; F, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb.; G, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; H, Madagapotamon humberti Bott, 1965; I, Skelosophusa gollhardi (Bott, 1965); J, S. prolixa Ng & Takeda, 1994; K, S. eumeces Ng & Takeda, 1994; L, Boreas uglowi n. gen., n. sp. Scale bar: A-D, 5.0 mm; E-L, 3.5 mm.

FIG. 6. — Superior view of the carpus of the cheliped (pereiopod 1) of adult males of Madagascan freshwater crabs (J, K based on Ng & Takeda 1994); A Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Malagasya antongilensis (Rathbun, 1905) n. comb.; F, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb.; G, Madagapotamon humberti Bott, 1965; H, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; I, Skeleosophusa gollhardi (Bott, 1965); J, S. prolixa Ng & Takeda, 1994; K, S. eumeces Ng & Takeda, 1994; L, Boreas uglowi n. gen., n. sp. Scale bar: A-D, 5.5 mm; E-L, 3.5 mm.

FIG. 7. — Superior and inferior views of the merus of the cheliped (pereiopod 1) of adult males of Madagascan freshwater crabs; A, B, Hydrothelphusa agilis A. Milne-Edwards, 1872; C, D, H. madagascariensis (A. Milne-Edwards, 1872); E, F, H. bombetokensis (Rathbun, 1904); G, H, H. goudoti (H. Milne Edwards, 1853) n. comb.; I, J, Malagasya antongilensis (Rathbun, 1905) n. comb.; K, L, Madagapotamon humberti Bott, 1965; M, N, Skelosophusa gollhardi (Bott, 1965); O, P, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; Q, R, Boreas uglowi n. gen., n. sp. Scale bar: A-H, 5.0 mm; I-T, 3.0 mm.

FIG. 8. — Last walking leg (pereiopod 5) of adult males of Madagascan freshwater crabs (H based on Ng & Takeda 1994); A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853) n. comb.; E, Boreas uglowi n. gen., n. sp.; F, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; G, Madagapotamon humberti Bott, 1965; H, Skelosophusa prolixa Ng & Takeda, 1994; I, Malagasya antongilensis (Rathbun, 1905) n. comb.; J, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb. Scale bar: A-D, 5.0 mm; E-L, 2.6 mm.

FIG. 11. — Summaries of the known distribution of the Madagascan freshwater crabs; A, Hydrothelphusa agilis A. Milne-Edwards, 1872; B, H. madagascariensis (A. Milne-Edwards, 1872); C, H. bombetokensis (Rathbun, 1904); D, H. goudoti (H. Milne Edwards, 1853); E, Marojejy longimerus Cumberlidge, Boyko & Harvey, 2002; F, Malagasya antongilensis (Rathbun, 1905) n. comb.; G, M. goodmani (Cumberlidge, Boyko & Harvey, 2002) n. comb.; H, Madagapotamon humberti Bott, 1965; I, Skelosophusa gollhardi (Bott, 1965); J, S. prolixa Ng & Takeda, 1994; K, S. eumeces Ng & Takeda, 1994; L, Boreas uglowi n. gen., n. sp.