. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 546 Thibaud & J. Najt. Figs 1—4: Isotogastrura arenicola gen. n., sp. n. 1) dorso-basal sensory organ of antennal seg- ment IV. 2) sensory organ of antennal segment III. 3) leg III. 4) glandular opening of ab- dominal tergite V. Fourth antennal segment without apical vesicle and with well developed sensillae and an ad- ditional dorso-basal complex sensory organ. Third antennal segment sense organ with two simple dorsal sensillae with a single base and a la
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 546 Thibaud & J. Najt. Figs 1—4: Isotogastrura arenicola gen. n., sp. n. 1) dorso-basal sensory organ of antennal seg- ment IV. 2) sensory organ of antennal segment III. 3) leg III. 4) glandular opening of ab- dominal tergite V. Fourth antennal segment without apical vesicle and with well developed sensillae and an ad- ditional dorso-basal complex sensory organ. Third antennal segment sense organ with two simple dorsal sensillae with a single base and a lateral microsensilla. Buccal parts of chewing type. Corneae present. Postantennal organ absent. Legs short. Basal part of tibiotarsus III, in both sexes, with a cuticular expansion. Claws with a dorsal spine and a long empodial appendage. Furca short but well individualised. Tenaculum present. Small size. Psammobiotic. Type species: Isotogastrura arenicola gen. n., sp. n. Isotogastrura arenicola sp. n. Description: Holotype length mm, length of paratypes between and mm. Colour in alcohol pale grey-bluish. Pigment granulated, uniformly distributed over dorsal areas except for the darker eyepatches. Two pairs of dorso-median cuticular expansions in the middle of thoracic segment I, one pair in the posterior margin of thoracic segment II through abdominal segment III and a single one in the posterior margin on abdominal segment V (Figs 14, 15, 17). A single dorsal glandular opening, partly covered by an integumentary fold, of the anterio-median part of ab- dominal segment V (Figs 4, 15). Antennal segments III and IV clearly separated. Antennal segment IV with 7 long subcylin- drical sensillae, without microsensilla, with a subapical "organit" and a complex dorso-basal sensory organ consisting of one thick short finely granulated sensilla with two lobes, two fine-. Please note that these images are extracted from scanned page images that may have been digita
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