Orthomorpha coarctata (De Saussure, 1860)

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 : 10-15

Orthomorpha coarctata (De Saussure, 1860) Figs 48

Polydesmus coarctatus De Saussure 1860: 297 (D).

Paradesmus flavocarinatus Daday 1889: 136 (D).

Orthomorpha coarctata - Attems 1937: 62 (D); Jeekel 1968: 45 (M) et auctorum.

Orthomorpha coarctata gigas Attems 1927: 63 (D).

Asiomorpha coarctata - Verhoeff 1939: 117 (D) et auctorum.

Orthomorpha coarctata gigas - Jeekel 1968: 45 (M); Golovatch 1998: 43 (D) et auctorum.

Material examined.

1 ♂, 2 ♀(CUMZ), Thailand, Chiang Mai Prov., Mae Rim Distr., Queen Sirikit Botanical Garden, 19°30'17"N, 99°25'89"E, 03.03.2007, leg. N. Likhitrakarn. 1 ♀ (CUMZ), Nan Prov., Mueang Nan Distr., Nan Resort, ca 240 m, 18°54'21"N, 100°45'45"E, 11.10.2009, leg. N. Likhitrakarn. 1 ♂, 1 ♀ (CUMZ), same Prov., Pua Distr., Wora Nakhom Subdistr., ca 270 m, 19°55'43"N, 100°55'14"E, 29.01.2010, leg. R. Chanabun. 1 ♂ (CUMZ), Phrae Prov., Rong Kwang Distr., Hoylong Waterfall, 18°44'39"N, 100°44'95"E, 09.10.2009, leg. R. Chanabun. 1 ♂ (CUMZ), Phitsanulok Prov., Wang Thong Distr., Sukunotayan Waterfall, 17°23'73"N, 100°53'5"E, 09.10.2009, leg. N. Likhitrakarn. 3 ♂ (CUMZ), Tak Prov., Tha Song Yong Distr., Mae Usu Cave, ca 140 m, 17°18'16"N, 98°09'21"E, 30.05.2009, leg. N. Likhitrakarn. 1 ♀ (CUMZ), same Prov., Umphang Distr., Thee Lor Su Riverside Resort, ca 470 m, 16°02'47"N, 98°51'9"E, 06.06.2009, leg. R. Chanabun. 7 ♂, 5 ♀ (CUMZ), Kamphaeng Phet Prov., Mueang Kamphaeng Phet Distr., Thai Restaurant, 17.01.2011, leg. N. Likhitrakarn & R. Chanabun. 1 ♀ (CUMZ), Ubon Ratchathani Prov., Khongchiam Distr., Tadton Waterfall, 14.05.2011, leg. R. Chanabun. 1 ♀ (CUMZ), Saraburi Prov., Chaloem Phra Kiat Distr., Siwilai Cave, 15°12'03"N, 101°27'13"E, 31.09.2006, leg. R. Chanabun. 2 ♂, 1 ♀ (CUMZ), Phra Nakhon Si Ayutthaya Prov., Mueang Phra Nakhon Si Ayutthaya Distr., 15.11.2009, leg. C. Sutcharit. 1 ♂ (CUMZ), same Prov., Maharat Distr., Seafood Restaurant, 20.09.2009, leg. N. Likhitrakarn. 1 ♂ (CUMZ), Nakhon Nayok Prov., Ban Na Distr., near house, 17.05.1952, leg. K. Isarankura. 1 ♂ (CUMZ), Sa Kaeo Prov., Khlong Hat Distr., Thamphet Temple, ca 170 m, 13°21'15"N, 102°18'47"E, 17.09.2009, leg. R. Chanabun. 1 ♂, 1 ♀ (CUMZ), Bangkok Prov., Pattum Wan Distr., Chulalongkorn University campus, 14°11'0"N, 100°53'02"E, 03.07.2009, leg. N. Likhitrakarn. 1 ♂ (CUMZ), Phetchaburi Prov., Ban Laem Distr., 20.07.2009, leg. R. Chanabun. 1 ♂ (CUMZ), Chonburi Prov., Si Racha Distr., Khao Kheow Open Zoo, 13°21'54"N, 101°05'17"E, 03.04.2007, leg. R. Chanabun. 1 ♀ (CUMZ), same Prov., Bothong Distr., Bothong Waterfall, ca 90 m, 13°15'01"N, 101°22'33"E, 15.09.2009, leg. R. Chanabun. 1 ♀ (CUMZ), Chanthaburi Prov., Khlung Distr., Makok Waterfall, 12°59'16"N, 102°26'02"E, 03.09.2007, leg. C. Sutcharit. 1 ♀ (CUMZ), same Prov., Khaeng Hang Maeo Distr., Khao Sibhachan, 13°33'36"N, 102°11'49"E, 30.12.2008, leg. N. Likhitrakarn. 1 ♀ (CUMZ), Ranong Prov., Mueang Ranong Distr., 06.10.2008, leg. C. Sutcharit. 8 ♂, 13 ♀, 3 juv. (CUMZ), Phang Nga Prov., Khura Buri Distr., Similan National Park, Ko Similan, Island 8, 8°40'01"N, 97°38'54"E, 07.04.2010, leg. S. Panha & N. Likhitrakarn. 1 ♂ (CUMZ), Surat Thani Prov., Ban Ta Khun Distr., Ratchaprapa Dam, 9°37'20"N, 99°21'0"E, 08.10.2008, leg. N. Likhitrakarn. 2 ♀ (CUMZ), Phatthalung Prov., Mueang Phatthalung Distr., Tham Malai Thep Nimit, ca 20 m, 7°38'09"N, 100°05'04"E, 11.01.2009, leg. R. Chanabun. 2 ♀ (CUMZ), Satun Prov., Mueang Satun Distr., Tarutao National Park, Ao Talo Wow, 7°02'30"N, 100°08'20"E, 09.04.2008, leg. R. Chanabun. 1 ♀ (CUMZ), Malaysia, Terengganu, Kenyir Lake, ca 170 m, 4°50'44"N, 102°43'15"E, 25.05.2011, leg. R. Chanabun. 7 ♂, 18 ♀ (CUMZ), Johor, Yong Peng, ca 20 m, 2°0'40"N, 103°03'25"E, 21.05.2011, leg. R. Chanabun. Syntypes of Orthomorpha coarctata gigas : 1 ♂, 1 ♀ (NHMW-3504), Indonesia, Maluku Prov., Banda Sea, Maluku Barat Regency, Poelau Island, Teoen (= Teun), leg. Kopstein.

Descriptive notes.

Length 14.5-20.5 (♂) or 16.5-27.5 mm (♀), width of midbody pro- and metazona 1.1-1.7 and 1.5-2.7 mm (♂), 1.1-2.5 and 1.6-3.2 mm (♀), respectively.Coloration, texture, all main somatic and gonopod characters as in Figs 4-8. Neither sternal lobe nor cone(s) between ♂ coxae 4 (Fig. 4H & I), at most only traces of poor knobs (Fig. 7H & I).

Gonopods (Figs 5, 6 & 8) with tip of solenophore produced into a single lobe, all other spikes or denticles being either missing or nearly missing.

Remarks.

This pantropical species has been described and redescribed several times, often under different names (e.g. Jeekel 1968). From Thailand, it had been described as Paradesmus flavocarinatus until Enghoff (2005) showed it to actually represent still another synonym of Orthomorpha coarctata . No full catalogue is attempted here as being superfluous, with hundreds of references involved.

Our restudy of the type material of Orthomorpha coarctata gigas , kept in NHMW (Figs 7 & 8), confirms Jeekel’s (1968) synonymization of this subspecies with Orthomorpha coarctata s. str.

Species with a bifid gonopod tip, with only a terminal and a subterminal denticle or lobule