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A cladistic analysis and classification of trichodectid mammal lice (Phthiraptera: Ischnocera) 2v C. H. C. Lyal Department of Entomology, British Museum (Natural History), Cromwell Road, London SW7 5BD Contents Synopsis 187 Introduction 187 Acknowledgements 188 Method of systematic analysis 188 Relationship of systematic analysis and classification 189 Morphology 189 Character survey 203 Character analysis 213 Identification of apomorphic states 213 Cladistic analysis 223 Taxonomic history of Trichodectidae 234 Proposed classification 241 Descriptions of genera and subgenera 247 Bovicolinae Keler 247 Eutrichophilinae Keler 265 Dasyonyginae Keler 267 Trichodectinae Kellogg 286 Neotrichodectinae subfam. n 321 Keys to Trichodectidae 334 Key to subfamilies 335 Key to genera and subgenera 335 References 340 Index 344 Synopsis Observations on phthirapteran morphology are analysed with particular reference to the Trichodectidae. Problems of structure, homology and nomenclature associated with major morphological features are briefly reviewed and solutions suggested where possible; where appropriate, the morphological terminolo-gy is clarified. A cladistic analysis of the 351 species and subspecies of Trichodectidae is carried out using the states of 187 characters, and the taxa are re-classified in accordance with the results and the principles of phyletic sequencing. Twenty genera are accepted in five subfamilies. Ten of the genera are divided into 27 subgenera. This necessitates the description of one new subfamily, three new genera and four new subgenera. Three genera are newly synonymised, eight genera and subgenera are recalled from synonomy, and four genera are reduced to subgenera. The generic placements of 106 species and subspecies are changed. Keys to the subfamilies, genera and subgenera are provided, and the genera and subgenera are described. Introduction The Trichodectidae is a family of ischnoceran chewing lice parasitic on mammals. There are 351 described species and subspecies grouped into between 13 and 39 genera, various workers having widely differing views on generic limits. The classification of the Trichodectidae at the generic level is perhaps more confused than that of any other group of lice (Hopkins, 1949, 1960; Emerson & Price, 1981) and no workable keys to genera are available. The confusion and Bull. Br. Mus. nat. Hist. (Ent.) 51 (3): 187-346 Issued 31 October 1985

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A cladistic analysis and classification of trichodectid mammal lice (Phthiraptera: Ischnocera)

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