Sinocallipus catba, Stoev, Pavel & Enghoff, Henrik, 2011

Stoev, Pavel & Enghoff, Henrik, 2011, A review of the millipede genus Sinocallipus Zhang, 1993 (Diplopoda, Callipodida, Sinocallipodidae), with notes on gonopods monotony vs. peripheral diversity in millipedes, ZooKeys 90, pp. 13-34 : 15-17

Sinocallipus catba sp. n. Figs 1-52630

Material examined.

Holotype: ♂, 69 PT + telson, Vietnam, Hai Phong Province, Cat Ba Island, Hoa Cuong Cave near Gia Luang, 20.845161°N, 106.981597°E, 5 m alt., 30.IX.1998, by hand, L. Deharveng leg. VIET-485 (MNHN). - Paratype: ♂, 67 PT + telson, same island, Tien Duc Cave, 26.IX.1998, by hand, L. Deharveng leg., VIET-452 (MNHN).

Description of locality.

This species was found in two moderately long, humid caves. Tien Duc is approximately 100 m long, while Hoa Cuong is 100-120 m long. In Tien Duc, the specimen was found on non-humid walls. Both caves host a rich cave fauna, including unidentified cambalopsid and haplodesmid millipedes (L. Deharveng, in lit.).

Origin of name.

For Cat Ba Island, the type locality.

Diagnosis.

Differs from Sinocallipus simplipodicus , Sinocallipus jaegeri and Sinocallipus thai by the white-yellowish body colour, brown antennomeres 2-5 and eye composed of 33 ocelli, and from Sinocallipus deharvengi by the smaller body size, antennae and gonocoxal process g, as well as by having paraprocts divided into larger ventral and smaller dorsal sclerites.

Description.

Males:

Maximal length ca 50 mm, width of midbody PT 2.4 mm, 67-69 PT + telson. Body colour: uniformly white-yellowish, without particular coloration pattern; metazonites without posterior band. Head: uniformly white, cephalic suture visible. Antennae: long, extending beyond the posterior edge of PT 9 when folded backwards; antennomeres 2-5 light brown; 1, 6, 7 - white (Fig. 1); length of antennomeres: 1 - 0.3 mm, 2 - 1.4 mm, 3 - 1.8 mm, 4 - 1.2 mm, 5 - 1.3 mm, 6 - 0.7 mm, 7 - 0.4 mm; antennomere ratio: 3>2>5>4>6>7>1; tip of antennomere 7 with four cones protruding beyond posterior margin (Fig. 2). Eyes: black, well delineated, composed of 33 ocelli in 5 rows (Fig. 3).

Width of PT 2=3<1=4<5<6<7. PT higher than broad, ratio: 1.05: 1. Dorsal side of collum and PT2-3 smooth, lateral sides ribbed. Crests poorly developed, broad and flattened anteriorly, abruptly narrowing and more pronounced posteriorly; 5+5 between the ozopores on midbody PT. Ozopores small, barely visible on most PT, lying between crests 5 and 6 in midbody PT. Paraprocts divided into smaller dorsal and larger ventral sclerites. Dorsal sclerite surmounted with two macrosetae in a vertical row. Spinnerets: long and slender, ending with a long seta.

All legs white-yellowish, long and slender, ending with a long claw. Tarsal pads very poorly developed, present on leg-pairs 3-12. No particular modifications on coxae of pregonopodal legs, prefemora of legs 4-7 swollen. Leg-pair 9 (Figs 4, 26): coxa subtrapezoidal; trochanter expanded medio-ventrad forming a rather elongated process (h) with a pointed tip and a smaller process z.

Chaetotaxy: unknown, all setae broken off.

Gonopods (Fig. 5): similar to those of congeners; coxae (cx): process g moderately large and swollen, ca 1.5 times the length of process k; processes g and k apically rounded, not truncated as in Sinocallipus jaegeri . Femoroid (fe): with three slender, acicular (n), and one short and subfalcate (m) terminal projections. Cannula (ca): long, and slender, not coiled.

Female:

unknown.