Plusioglyphiulus boutini Mauries , 1970

Likhitrakarn, Natdanai, Golovatch, Sergei I., Thach, Phanara, Chhuoy, Samol, Ngor, Peng Bun, Srisonchai, Ruttapon, Sutcharit, Chirasak & Panha, Somsak, 2020, Two new species of the millipede genus Plusioglyphiulus Silvestri, 1923 from Cambodia (Diplopoda, Spirostreptida), ZooKeys 938, pp. 137-151 : 137

Plusioglyphiulus boutini Mauries, 1970 Figure 1A

Plusioglyphiulus boutini Mauriès, 1970: 509.

Plusioglyphiulus boutini -Hoffman, 1977: 715; Mauriès 1983: 272; Boutin 2001: 1760; Jeekel 2004: 57; Golovatch et al. 2009: 72; 2011: 4; Likhitrakarn et al. 2015: 179.

Material examined.

4 ♂, 5 ♀ (CUMZ-CAM185), Cambodia, Kampot Province, Kampong Trach, Phnom Kampong Trach Cave Temple (locality code C043), 510 m, 10°34'2"N, 104°28'6"E, 15.09.2019, leg. E. Jeratthitikul and R. Srisonchai. 5 ♂ (CUMZ-CAM184), Cambodia, Kampot Province, Banteay Meas, Prasat Phnom Totong Temple (locality code C042), 510 m, 10°41'49"N, 104°31'21"E, 15.09.2019, leg. E. Jeratthitikul and R. Srisonchai.

Descriptive notes.

Length of adult 24.3-37.2 mm (♂) or 31.2-38.5 mm (♀); width of midbody 1.3-1.7 mm (♂) or 1.4-1.9 mm (♀).

Coloration of live animals light brown to light yellow-brown (Fig. 1A ) with lighter anterior and posterior parts of body; antennae, venter and legs light yellowish; coloration in alcohol, after six months of preservation, uniformly red brownish to dark brown, dorsal crests and porosteles usually dark brownish. Antennae and venter yellow brownish to brownish. Eyes brown to blackish.

Adult body with 54-66p+2-4a+T (♂) or 57-65p+1-4a+T (♀). Eye patches transversely ovoid, with 6-11 flat ommatidia arranged in three longitudinal rows. Clypeus with three teeth anteromedially. Carinotaxic formula of collum: 1a/(t)+2p/(t)/(t)+3p/(t)+4p/(t)/(t)/t/t+ta/t+5p/t/(t)/t/t/t+pp/t/(t)/t/t+ta/t+m/m.

Remarks.

The new specimens fully agree with the original description ( Mauriès 1970), which was sufficiently detailed and beautifully illustrated. Instead, we only present a few notes on variation and a new illustration (Fig. 1A ) to show coloration based on live material.

This species was originally described from near Kampong Trach, 10.554N, 104.471E, Kampot Province, Cambodia ( Mauriès 1970). The new material was taken from the Phnom Kampong Trach Cave and Prasat Phnom Totong Temple, both situated approximately 17 km away from the type locality.

Figures

Figure 1. Habitus, live coloration A Plusioglyphiulus boutini Mauries, 1970, ♂ from Prasat Phnom Totong Temple B Plusioglyphiulus biserratus sp. nov., ♀ paratype C Plusioglyphiulus khmer sp. nov., ♂ paratype. All pictures by R. Srisonchai, not taken to scale.