. Bonner zoologische Monographien. Zoology. PANESAR, EVOLUTION IN WATER MITES. FIG. 75. Anisitsidartia micropalpis Qook, 1966 allo- type (male): IV-L-5,6 (top), I-L-5,6 (middle), cheli- cerae (bottom) [Scale bar = 100 |im]. Taxonomic placement A DS organization similar to that Anisitsidartia (DS appearing to be divided into an anterior and a pos- terior half, together covering most of the surface of the dorsum) is known in a few genera of the Limnesiidae (, Psammotorrenticola, Stygomamersopsis, some spe- cies of the Nibtonia-^vowp, Tubophorella, Neomamersa, Meramecia, Nicalimnesia, and in
. Bonner zoologische Monographien. Zoology. PANESAR, EVOLUTION IN WATER MITES. FIG. 75. Anisitsidartia micropalpis Qook, 1966 allo- type (male): IV-L-5,6 (top), I-L-5,6 (middle), cheli- cerae (bottom) [Scale bar = 100 |im]. Taxonomic placement A DS organization similar to that Anisitsidartia (DS appearing to be divided into an anterior and a pos- terior half, together covering most of the surface of the dorsum) is known in a few genera of the Limnesiidae (, Psammotorrenticola, Stygomamersopsis, some spe- cies of the Nibtonia-^vowp, Tubophorella, Neomamersa, Meramecia, Nicalimnesia, and in males of Shivatonia gen. nov. and Bharatonid). A nearly complete VS, with narrow gaps between the secondary sclerotization posterior to the genital field, and the secondary sclerotization posterior to C4, is found in several species of the Nilotonia scutata- like species (, N. scutata, N. testudinata, N. biscn- tata, N. amazonicd). A strikingly small palpus, as found in Anisitsidar- tia, has been noted for several species among the early derived Hygrobatoidea (). Small palps are found in different taxa (, Psammolimnesia mexicana, Neo- atractides inachus, Africoxus szalayi, Torrenticola suvarna, Pseudotorrenticola mitchelli). Some species of the family Torrenticolidae possess rather small palps. In some other species with small palps (, Tubophora, Psammotorrenticola) a camero- stome is developed, allowing the tracing of prey in the interstitial environment. In Anisitsidartia no camero- stome is present. While in other taxa, , genera of the Torrenti- colidae, single species among several others of the ge- nus does possess a small palpus, m Anisitsidartia a separate genus has been erected for the species with the unusual palp. The small palpus is the only character fully dis- tinguishing Anisitsidartia from certain species of the genus Nilotonia, especially from the Nilotonia scuta- ta-Yxke species. To describe, what is a "small" palpus the ratio of to
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