Hypopi (Acari: Hypoderatidae) from owls (Aves: Strigiformes: Strigidae).
1996
Pence D.B. | Bergan J.F.
Hypopi (deutonymphs) of the family Hypoderatidae were found in a barn owl, Tyto alba (Scopoli), and a burrowing owl, Speotyto cunicularia (Molina), from Texas. A redescription is provided for mature specimens of the hypopus of Tytodectes (Tytodectes) tyto Fain from the subcutaneous adipose tissues of the pelvic region in the barn owl. The hypopus of Tytodectes (Tytodectes) speotyto n. sp. is described from specimens in the subcutaneous adipose tissues of the pelvic region and in the adipose tissues of the intermuscular fasciae of the ankle in the burrowing owl. T (T) speotyto appears most similar in size and chaetotaxy to T (T) glaucidii Cerny described from the Cuban pygmy owl, Glaucidium siju (d'Orbigny), in Cuba, but differs in the presence of a spine on tibia IV, which also occurs in T (T) tyto. Both of the former species have the anterior apodemes of coxae I fused in a simple V and lack a sternum. They differ from T (T) tyto which has the anterior apodemes of coxae I fused in a Y and there is a well developed sternum. Based on the above 3 described hypopi, the hypoderatids of owls represent an assemblage of small closely related, but easily differentiated, species. The occurrence of a few specimens of Neottialges evansi Fain in the barn owl and Hypodectes (Hypodectoides) propus (Nitzsch) in the burrowing owl probably represent examples of host capture by hypopi that normally occur in cormorants and pigeons, herons or egrets, respectively.
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