Gen Takaku

Obligate myrmecophily in an oribatid mite : novel symbiont of ants in the oriental tropics

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Javanese Species of the Mite Genus Macrocheles (Arachnida: Acari: Gamasina: Macrochelidae)

Abstract Twelve mite species of the genus Macrocheles (Acari: Macrochelidae) were collected from the body surface of dung beetles in Java, Indonesia. Of these, three species, i.e., Macrocheles jabarensis, M. jonggolensis, and M. sukabumiensis, were described as new to science. Female of M. dispar was redescribed. Two species, i.e., M. baliensis and M. sukaramiensis, were recorded from Java for the first time. The occurrence of five species previously recorded from Java, i.e., M. hallidayi, M. kraepelini, M. limue, M. oigru, and M. merdarius, were reconfirmed. Taxonomic status of M. sp. aff. glaber was not settled in the present study, because we could not obtain the male and immatures which are indispensable for exact identification. In total 15 species of the genus Macrocheles, including 3 species already recorded but not collected in this research (M. crispa, M. krantzi and M. subbadius), are known from Java up to date.

Aribatidae, a new myrmecophilous oribatid mite family from Java

Abstract A new oribatid mite, Aribates javensis gen. et sp. nov., is described from ant nests in West Java, Indonesia. It is quite peculiar in lacking sensilli as well as in the variable number of anogenital setae. A new family, Aribatidae, is erected for this species. An interesting mutualistic relationship is found between the mite and the ant Myrmecina sp.