New records of subcutaneous mites (Acari: Hypoderatidae) in birds, with examples of potential host colonization events.
New host, geographic records, or both are established for 14 species of hypoderatid deutonymphs (including Hypodectes nycticoracis, H. propus, Phalacrodectes whartoni, Frehelectes gaudi, Neottialges ajajae, N. apunctatus, N. bassani, N. eudocimae, N. evansi, N. kutzeri, N. montagui and N. plegadicola) from 14 species of birds (including Nyctanassa violacea, Columba leucocephala, Eudocimus albus, Bubulcus ibis, Phalacrocorax brasilianus, Egretta caerulea, Pelecanus erythrorhynchos, Morus bassanus, Mycteria americana, Casmerodius albus, Fratercula cirrhata, Plegadis chihi and Ardea herodias) in North America. 10 of these records are regarded as examples of a potential host colonization event where these hypopi have become established in hosts other than those with which they are normally associated. Herein, potential host colonization events by hypoderatid deutonymphs are regarded as more of an ecologically determined than physiologically specific phenomenon, often specifically related to sharing of nesting sites in the same rookeries by different host taxa. Neottialges ibisicola is placed as a junior synonym of N. plegadicola. The taxonomic status of Hypodectes propus from columbid versus ardeid hosts needs further study.