Graduate Thesis Or Dissertation

 

Application of the study of organotaxy to a generic revision of the family Tydeidae (Acari : Actinedida) Public Deposited

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  • The organotaxy of the family Tydeidae is reviewed in light of the fundamental paradigms of Grandjean. The system of designation previously used to describe the tydeid idiosoma is replaced by a notation system based on chaetotaxy and poroidotaxy. A preliminary survey of dorsal sigillotaxy also is included. The phanerotaxy of each leg segment is analyzed in depth, particularly from the standpoint of variation. The degree of fusion and muscle relationship of the interfemoral joint on leg IV is given special attention. The basic structure of gnathosoma is summarized and an interpretation of the palp phanerotaxy is presented. Based on the results of these studies, 41 genera are proposed. Proctotydaeus Berlese 1911 sensu Fain & Evans 1966 is returned to the Tydeidae. Two genera are defined as new combinations (Proctotydaeus and Tydeus Koch 1835) while 21 others are listed as new. The genera are distributed in seven new subfamilies as follows : Australotydeinae (Austrolotydeus Stain 1969) ; Meyerellinae (Meyerella Baker 1966) ; Pretydeinae (Fretydeus n. gen. and Prelorryia n. gen.) ; Pronematinae (Apopronematus n. gen., Homeorronematus n. gen., Meta Pronematus n. gen., Naudea. Meyer & Rodrigues 1965, Pararronematus Baker 1965, Pausia Kuznetzov & Livshits 1972, Proctotydaeus n. comb., Fronecunulatus Baker 1965, Pronematulus Baker 1965, Pronematus Canestrini 1886 sensu Baker 1965) ; Triophtydeinae (Arotriorhtydeus n. gen., Metatriorhtydeus n. ger., Pretriorhtydeus n. gen. and Teletrionhtydeus n. gen.) ; Tydaeolinae (Aesthetydeus n . gen., Coccotydaeolus Baker 1965, Lasiotydeus Berlese 1908 sensu Baker 1965, Metatydaeolus n. gen., Microtydeus Thor 1931 sensu Baker 1965, Paratriorhtydeus Baker 1966, Paratydaeolus n. gen., Primotydeus n. gen., Pseudotydeus Baker & Delfinado 1974, Tydaeolus Berlese 1910 sensu Baker 1965, Tyndareus Livshits & Kuznetzov 1972) and Tydeinae (Afrotydeus Baker 1970, Apolorryia n. gen., Eotydeus Kuznetzov 1973, Homeotydeus n. gen., idiolorryia n . gen., Krantzlorryia n. gen., Metelorryia n. gen., Neolorryia n. gen., Orthotydeus n. gen., Perafrotydeus n . gen., Tydeus n. comb. and Tydides Kuznetzov 1975). Eight species are described : Meyerella marshalli, Metatriorhtydeus lebruni, Homeorronematus vidae, Aporronematus bakeri, Paratydaeolus lukoschusi, Meta tydaeolus joannis, Paratriophtydeus coineaui, and Primo tydeus strandtmanni. The study concludes with a brief discussion of the systematic position of the family.
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