various litter/soil habitats, ant nests, animal burrows; 18 spp. are blind inhabitants on caves in so. US(1)
Peck S.B. (1973) A systematic revision and the evolutionary biology of the Ptomaphagus (Adelops) beetles of North America (Coleoptera; Leiodidae; Catopinae), with emphasis on cave-inhabiting species. Bulletin of the Museum of Comparative Zoology (Harvard) 145: 29-162.
Peck S.B. (1982) New records of poorly known Ptomaphagus from Texas and the Ozarks (Coleoptera: Leiodidae: Cholevinae). Coleopterists Bulletin 36: 109-111.
Peck S.B. (1984) The distribution and evolution of cavernicolous Ptomapahgus beetles in the southeastern United States (Coleoptera: Leiodidae; Cholevinae) with new species and records. Canadian Journal of Zoology 62: 730-740.
Peck S.B. (1998) Cladistic biogeography of cavernicolous Ptomaphagus beetles (Leiodidae, Cholevinae: Ptomaphagini) in the United States. Museo Regionale di Scienze Naturali, Torino (Italy) 1998: 235-260.
Peck S.B., Gnaspini P. (1997) Review of the myrmecophilous Ptomaphagus, subgenus Echinocoleus (new status), of North America (Coleoptera: Leiodidae; Cholevinae: Ptomaphagini). Canadian Entomologist 129: 93-104.