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Hypopi (Acari:Hypoderatidae) from owls (Aves:Strigiformes:Strigidae)

D B Pence¹, J F Bergan

¹Department of Pathology, Texas Tech University Health Sciences Center, Lubbock 79430, USA.

Journal of Medical Entomology

|September 1, 1996

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New owl mite species, Tytodectes (Tytodectes) speotyto, were identified in burrowing owls. These hypopi mites are closely related and distinguishable, offering insights into owl mite diversity.

Area of Science:

Acarology
Parasitology
Ornithology

Background:

Hypopi deutonymphs of the family Hypoderatidae are parasitic mites.
These mites are often found in the subcutaneous adipose tissues of birds.

Purpose of the Study:

To describe new species of hypopi mites found on owls.
To differentiate between closely related species of owl mites.
To investigate potential host-parasite relationships.

Main Methods:

Specimens of hypopi were collected from barn owls (Tyto alba) and burrowing owls (Speotyto cunicularia) in Texas.
Morphological characteristics, including chaetotaxy and apodeme fusion, were used for species identification and differentiation.
Comparative analysis was performed with existing descriptions of related mite species.

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Main Results:

A redescription of Tytodectes (Tytodectes) tyto hypopi from barn owls was provided.
A new species, Tytodectes (Tytodectes) speotyto n. sp., was described from burrowing owls.
T. (T.) speotyto was differentiated from T. (T.) tyto and T. (T.) glaucidii based on morphological traits, particularly the presence of a spine on tibia IV and the structure of coxae I apodemes and sternum.
Other mite species, Neottialges evansi and Hypodectes (Hypodectoides) propus, were found incidentally, suggesting potential host capture events.

Conclusions:

The hypoderatid mites found on owls represent a group of small, closely related, yet distinguishable species.
Morphological differences are key to differentiating these mite species.
Incidental findings suggest that some hypopi may occasionally parasitize hosts outside their typical range.