Orthomorpha enghoffi, Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2010

Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2010, The millipede genus Orthomorpha Bollman, 1893 in Thailand. 1. Revision of the sericata - group, with descriptions of four new species (Diplopoda, Polydesmida, Paradoxosomatidae), Zootaxa 2361, pp. 23-45 : 30

Orthomorpha enghoffi sp. n., variety from Huay E Loet

Figs 1 K–M, 4.

Description: Length 24 mm (male), 22 and 25 mm (female), width of midbody pro- and metazona 1.8 and 2.8 mm (male), 2.4 and 2.6 and 3.3 and 3.6 mm (female), respectively. Live coloration like in O. enghoffi sp. n.

All other characters as in the typical O. enghoffi sp. n., except as follows.

Anterior incisions on paraterga slightly less prominent ( Figs 1 K–M). Setigerous knobs on metaterga a little shorter, rear row usually rounded instead of being nearly completely or fully pointed. Paraterga usually slightly less upturned so that ozopore is mostly lateral rather than dorsolateral. Paraterga lying about level to dorsum on segments 2–10, below dorsum thereafter (male), or always well below dorsum (female). Caudal edge of paraterga less strongly fringed/crenulate, midway lobule often vestigial ( Fig. 1 K). Apical papillae on epiproct a little more widely emarginated ( Fig. 1 M).

Gonopods as in the typical form ( Fig. 4 ).

Figures

FIGURE 1. Orthomorpha enghoffi sp. n., male holotype (A) and paratype (B – J), and O. enghoffi sp. n., variety from Huay E Loet, male (K – M). A: habitus, live coloration. B & C: anterior part of body, dorsal and lateral views, respectively. D, E, K & L: segments 10 and 11, dorsal, lateral, dorsal and lateral views, respectively. F – H & M: posterior part of body, dorsal, ventral, lateral and dorsal views, respectively. I & J: sternal cones between coxae 4, subcaudal and sublateral views, respectively.

FIGURE 4. Orthomorpha enghoffi sp. n., variety from Huay E Loet, male. A & B: right gonopod, mesal and lateral views, respectively. C – F: distal part of right gonopod, mesal, subventral, sublateral and suboral views, respectively. Scale bar: 0.1 mm.