Abstract
The most highly troglomorphic Collembola of Southeast Asia, Coecobryasirindhornaesp. n., is described from a cave in Satun province, Thai Peninsula. It is characterised by its large size, extremely elongated antennae, relatively long legs and furca, reduced macrochaetotaxy, very long and slender claw, pointed tenent hair, four sublobal hairs on outer maxillary lobe, and the absence of eyes and pigmentation. A checklist of Thai Coecobrya species and a key to the troglomorphic species of Thailand are provided. Troglomorphy and conservation of cave habitats in the area are discussed.
Highlights
Among Collembola, one of the genera that exhibit most frequently morphological modifications considered to be linked to subterranean environments (Christiansen and Bellinger 1992, Deharveng 1990, Jordana 2012, Nilsai et al 2017)
Coecobrya sirindhornae sp. n. described here belongs to this second type
Like other described troglomorphic Coecobrya of Thailand (Nilsai et al 2017), C. sirindhornae sp. n. is linked to oligotrophic habitat in the dark zone of the cave where it has been discovered, living in an atmosphere permanently wet and moist
Summary
Insects 15(1): 139–151. Howarth FG (1980) The zoogeography of specialized cave animals: a bioclimatic model. Senckenberg Museum of Natural History (Görlitz) 7(1): 1–390. Zhang F, Deharveng L, Chen J-X (2009) New species and rediagnosis of Coecobrya (Collembola: Entomobryidae), with a key to the species of the genus. Zhang F, Jantarit S, Nilsai A, Stevens MI, Ding Y, Satasook C (2018) Species delimitation in the morphologically conserved Coecobrya (Collembola: Entomobryidae): a case study integrating morphology and molecular traits to advance current taxonomy.
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