LikhitrakarnNatdanaiGolovatchSergei I.PanhaSomsakRevision of the Southeast Asian millipede genus Orthomorpha Bollman, 1893, with the proposal of a new genus (Diplopoda, Polydesmida, Paradoxosomatidae) Zookeys29920112011131116110.3897/zookeys.131.1921 Orthomorpha pterygota http://species-id.net/wiki/Orthomorpha_pterygota Golovatch, 1998Figs 6468Orthomorpha pterygotaGolovatch 1998: 41 (D).Orthomorpha pterygota – Enghoff 2005: 98 (M, R); Decker 2010: 31 (R).Holotype.

♂(ZMUC), Thailand, Krabi Prov., road between Krabi and Phuket, 10 km north of Krabi, 8°09'N, 98°50'E, lowland tropical rainforest, < 200 m, 13.10.1991, leg. M. Andersen, O. Martin & N. Scharff.

Other material examined.

1 ♂ (CUMZ), Thailand, Phuket Prov., Mueang Distr., Kathu Waterfall, ca 10 m, 7°55'56"N, 98°19'23"E, forest, 25.12.2009, leg. N. Likhitrakarn.2 ♂ (CUMZ), same Distr., Panwa Cape, 8°20'11"N, 98°41'36"E, 05.11.2007, leg. C. Sutcharit.

Descriptive notes.

Length 31–35 (♂), width of midbody pro- and metazona 2.2–3.0 and 4.0–4.6 mm (♂), respectively (vs 34–37 mm in length, 2.2–3.4 and 4.0–4.7 mm in width on midbody pro- and metazona, respectively, both in ♂ and ♀, as given in the original description (Golovatch 1998)).

Coloration of live animals (Fig. 65A) dark brown with contrasting orange paraterga and orange-brown hind parts of metaterga; coloration of alcohol material upon long-term preservation faded to basically light brown (holotype) to dark castaneous brown with contrasting pallid to light greyish paraterga, most of mid-dorsal parts of metaterga and prozona, as well as epiproct (Figs 64 & 65B-H).

Orthomorpha pterygota Golovatch, 1998, ♂ holotype. A, B anterior part of body, dorsal and lateral views, respectively C, D segments 10 and 11, dorsal and lateral views, respectively E–G posterior part of body, lateral, dorsal and ventral views, respectively H, I sternal cones between coxae 4, subcaudal and sublateral views, respectively.

Orthomorpha pterygota Golovatch, 1998, ♂ from Kathu Waterfall (A), ♂ from Panwa Cape (B-J). A habitus, live coloration B, C anterior part of body, dorsal and lateral views, respectively D, E segments 10 and 11, dorsal and lateral views, respectively F, G, H posterior part of body, dorsal, ventral and lateral views, respectively I, J sternal cones between coxae 4, subcaudal and sublateral views, respectively.

Orthomorpha pterygota Golovatch, 1998, ♂ holotype. A, B right gonopod, lateral and mesal views, respectively.Scale bar: 0.2 mm.

Orthomorpha pterygota Golovatch, 1998, ♂ from Panwa Cape. A, B right gonopod, mesal and lateral views, respectively C–F distal part of right gonopod, mesal, lateral, subcaudal and suboral views, respectively. Scale bar: 0.2 mm.

Orthomorpha pterygota Golovatch, 1998, ♂ from Panwa Cape. A, B right gonopod, lateral and mesal views, respectively. Scale bar: 0.2 mm.

Remarks.

The original description of this species was so complete and detailed (Golovatch 1998) that no redescription seems to be necessary. Instead, we only provide new illustrations (Figs 64–68) showing the coloration, structural details and gonopod conformation of Orthomorpha pterygota, based both on the holotype and new samples.

This species occurs, so far as known, only on Phuket Island and in the adjacent Krabi Province, southern Thailand.

GolovatchSI (1998) On several new or poorly-known Oriental Paradoxosomatidae (Diplopoda Polydesmida), VI. Arthropoda Selecta 6(3–4): 35–46. [for 1997]EnghoffH (2005) The millipedes of Thailand (Diplopoda).Steenstrupia 29 (1): 87-103.DeckerP (2010) Contributions to the myriapod fauna of Thailand - New records of millipedes and centipedes from Thailand (Myriapoda: Diplopoda, Chilopoda).Schubartiana 4: 23-34.