Orthomorpha horologiformis Golovatch, 1998

Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2011, Revision of the Southeast Asian millipede genus Orthomorpha Bollman, 1893, with the proposal of a new genus (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 131, pp. 1-161 : 71-73

Orthomorpha horologiformis Golovatch, 1998 Figs 6973

Orthomorpha horologiformis Golovatch 1998: 39 (D).

Orthomorpha horologiformis - Enghoff 2005: 97 (M, R); Decker 2010: 31 (R).

Holotype.

♂(ZMUC), Thailand, Trang Prov., Hat Chao Mai National Park, 7°19'N, 99°27'E, gallery tropical forest near coast, <20 m, 26.10.1991, leg. M. Andersen, O. Martin & N. Scharff.

Other material examined.

1 ♂ (CUMZ), Thailand, Nakhon Si Thammarat Prov., Nopphitam Distr., Krungshing Waterfall, 9°12'43"N, 100°07'29"E, 27.10.2009, leg. R. Chanabun.1 ♀ (CUMZ), Phang Nga Prov., Mueang Phang Nga Distr., near Phung Chang Cave, 8°26'34"N, 98°30'59"E, 10.12.2009, leg. C. Sutcharit. 2 ♂, 2 ♀ (ZMUC), 2 ♂, 2 ♀ (ZMUM), 6 ♂, 4 ♀, 4 juv. (CUMZ), Krabi Prov., Khlong Thom Distr., Samorakot, 7°55'22"N, 99°15'35"E, 15.01.2009, leg. C. Sutcharit, N. Likhitrakarn & R. Chanabun. 1 ♀, 1 juv. (CUMZ), same Prov., Mueang Krabi Distr., Bantupprik School, ca 40 m, 8°10'50"N, 98°52'49"E, 16.01.2009, leg. R. Chanabun. 1 ♂ (CUMZ), Trang Prov., Mueang Trang Distr., 03.08.2010, leg. N. Likhitrakarn. 2 ♂, 4 ♀, 1 juv. (CUMZ), same Prov., Na Yong Distr., Khao Chao Priest Residence, 7°33'57"N, 99°46'27"E, 14.01.2009, leg. C. Sutcharit, N. Likhitrakarn & R. Chanabun. 2 ♂, 1 ♀ (CUMZ), Phatthalung Prov., Srinagarindra Distr., Sumano Cave, 7°59'08"N, 100°27'26"E, 15.10.2006, leg. C. Sutcharit. 3 ♂, 4 ♀ (CUMZ), same Prov., Khao Chaison Distr., Tham Nam Yen Hot Spring, ca 20 m, 7°27'02"N, 100°07'52"E, 01.01.2009, leg. C. Sutcharit, N. Likhitrakarn & R. Chanabun. 1 ♂ (CUMZ), Satun Prov., Mueang Satun Distr., Tarutao National Park, Ao Talo Wow, 7°02'30"N, 100°08'20"E, 8.04.2008, leg. R. Chanabun. 1 ♂ (CUMZ), same Distr., Tarutao National Park, Ao Chak Wow, 6°42'36"N, 99°38'29"E, 0.04.2008, leg. P. Pimvichai.

Descriptive notes.

Length 27-36 (♂) or 30-38 mm (♀), width of midbody pro- and metazona 2.1-3.5 and 3.6-4.5 mm (♂), 2.7-3.5 and 4.0-5.1 mm (♀), respectively.

Coloration of live animals (Fig. 70A) brown to dark castaneous with light yellow-brown paraterga and most of central parts of metaterga and prozona; coloration of alcohol material upon long-term preservation faded to brown (holotype) with contrasting pallid to light yellow paraterga, middle parts of metaterga and prozona, and venter (Figs 69 & 70B-H).

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 69-73) showing the coloration, structural details and gonopod conformation of Orthomorpha horologiformis , based both on the holotype and new samples.

This species appears to be quite widespread in the southern parts of Thailand (Map 3).