Martensiellus

Schwendinger, Peter J., 2006, A taxonomic revision of the family Oncopodidae VI. Martensiellus, a new genus from Borneo, and the discovery of a tarsal pore organ in Oncopodidae (Opiliones: Laniatores), Zootaxa 1325, pp. 255-266 : 262-263

? Martensiellus n. g. spp.

Figs 18–22

Two females from other parts of Borneo possess the same characteristics in somatic morphology (tarsal formula 1­1­2­2, leg tarsi/tarsomeres fairly large, a tarsal pore present on legs I and II) that place M. tenuipalpus n. sp. apart from all other described oncopodid species. I assume that these females also belong to Martensiellus n. g. and represent two undescribed species distinct from M. tenuipalpus n. sp. However, generic placement without conspecific males is uncertain and I therefore refrain from formally describing and naming them.

1. female (MHNG): Eastern Malaysia, Sarawak, Mulu National Park, near headquarters (4°00’N, 114°49’E), 200 m, collected on 19–24 August 2003 from rain forest leaf litter by A. Schulz. Different from the males of M. tenuipalpus n. sp. by: Body distinctly smaller (2.75 mm long); eye tubercle more conical ( Fig. 18 ); legs more slender and palpal tibia thicker; carapace­opisthosoma bridge present, divided; tiny process on palpal trochanter; distinct ventral process on proximal article of chelicera ( Fig. 18 ); tarsus of leg II relatively longer ( Fig. 19 ).

2. female (collection of C. Deeleman­Reinhold; mentioned in Martens & Schwendinger 1998: 548): Indonesia, Central Kalimantan Province, Kaharian (2°02’S, 113°40’E), collected from the leaf litter of a swampy primary forest on 2–16 October 1985 by S. Djojosudharmo. Different from males of M. tenuipalpus n. sp. by: Body much larger (5.19 mm long); eye tubercle broadly rounded; carapace­opisthosoma bridge present, undivided ( Fig. 20 ); legs more slender and papal tibia thicker; process on palpal trochanter large, bifid ( Fig. 20 ); chelicera more robust, with distad­directed dorsodistal process on proximal article and ventrodistal process on second article ( Fig. 21 ). Tarsus of leg II ( Fig. 22 ) similar to that of M. tenuipalpus n. sp. ( Fig. 7 ).

Figures

FIGURES 18 – 22.? Martensiellus n. g. spp., female from Mulu N. P. (18, 19), female from Kaharian (20 – 22). 18. Anterior part of body and proximal part of palpus and of chelicera, lateral view. 19, 22. Distal part of leg II, lateral view. 20. Anterior part of body and proximal part of palpus, lateral view; 21. Chelicera, retrolateral view. Scale bars: 1 mm (18 – 19, 20 – 22 same scale).

FIGURES 4 – 10. Martensiellus tenuipalpus n. g., n. sp., male (4 – 9 holotype, 10 paratype). 4. Chelicera, lateral view. 5. Palpus, lateral view. 6. Distal parts of legs, lateral view (6 leg I, 7 leg II, 8 leg III, 9 leg IV). 10. Palpus and anterior part of body, lateral view. Scale bars: 1 mm (4 – 9 same scale).