Tylopus parajeekeli, Likhitrakarn, Natdanai, Golovatch, Sergei I., Prateepasen, Rujiporn & Panha, Somsak, 2010

Likhitrakarn, Natdanai, Golovatch, Sergei I., Prateepasen, Rujiporn & Panha, Somsak, 2010, Review of the genus Tylopus Jeekel, 1968, with descriptions of five new species from Thailand (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 72, pp. 23-68 : 32-33

Tylopus parajeekeli sp. n. Figs 1315

Holotype

♂ (CUMZ), Thailand, Chiang Mai Province, Chom Thong District, Doi Inthanon National Park, summit, 2520 m, 18°34'29N, 98°28'48E, 12.10.2009, leg. S. Panha, J. Sutcharit & N. Likhitrakarn.

Paratype:

1 ♂ (CUMZ), same locality, together with holotype.

Name:

To emphasize the close resemblance to Tylopus jeekeli Golovatch & Enghoff, 1993.

Diagnosis:

Very similar to Tylopus jeekeli , especially as regards its gonopod conformation, but differs in the paraterga lying much lower (at ca 1/3 versus 1/4-1/5 midbody height), in the caudal corners of the paraterga protruding behind the rear tergal contour already from segment 16 (versus segment 2), and also in gonopod spine z being much smaller and placed closer to the base of spine h.

Description:

Length 31 mm (holotype) or 31.5 mm (♂), width of midbody pro- and metazona 2.4 and 3.2 mm (holotype) or 2.3 and 3.4 mm (♂), respectively. Coloration of live animals and alcohol material uniformly blackish-brown (Fig. 13 A–G); calluses of paraterga a little lighter, brown; antennomeres 1-5 light brown to yellowish, legs and venter light brown to grey-yellowish (Fig. 13 A–G).

All characters as in Tylopus bispinosus sp. n., except as follows.

Antennae rather short and slender, reaching behind segment 3 dorsally. In width, head = segment 3 <collum <segments 2 and 4 <5-16; thereafter body gradually and gently tapering towards telson (Fig. 1B).

Paraterga on collum like large rounded flaps (Fig. 13B, C). Following paraterga lying at about 1/3 midbody height, evidently declined ventrolaterally, subhorizontal only on a few posteriormost segments, mostly pointed caudally, subrectangular until segment 15, thereafter increasingly well protruding behind rear tergal contour (Fig. 13 A–G). Metaterga with 2(3)+2(3) and 3 –5+3– 5 long setae arranged in two transverse rows. Axial line present on both halves of metaterga. Transverse sulcus present on segments 5-18, very finely beaded at bottom (Fig. 13B, F, G). Stricture between pro- and metazona finely striolate (Fig. 13B, D). Epiproct tip broad and emarginate (Fig. 13G, H). Hypoproct semi-circular, both caudal setae widely separated (Fig. 13H). Pleurosternal carinae as complete ridges on segments 2-4, thereafter retained until segment 17 mostly as a small caudal tooth (Fig. 13 C–F).

A low, only slightly divided, setose lobe between coxae 4 (Fig. 13I, J). Legs relatively short, ca 1.6-1.7 times as long as midbody height (Fig. 13K). Femora evidently bulged laterally (Fig. 13K); all postgonopodal legs except two last pairs with an evident adenostyle in parabasal 1/3 of each postfemur and tibia; tarsal brushes missing; all telopoditomeres except tarsi with dense adpressed pilosity (Fig. 13K).

Gonopods (Figs 14, 15) with lobe l well-demarcated; spine h small, but elongate, not bifid; spine z very small, dentiform, placed at base of spine h.