Fig 84 (a). Sternostoma porteri female dorsal habitus.

Fig 84 (b). Sternostoma porteri female dorsum.

Fig 84 (c). Sternostoma porteri female venter.

North American host records:
Picidae:
Colaptes auratus, Northern Flicker (Hyland 1962; Pence 1972, 1975; Knee et al. 2008)
Melanerpes aurifrons, Golden-fronted Woodpecker (Pence and Casto 1975; Estebanes-Gonzalez 1997)
Picoides pubescens, Downy Woodpecker (Hyland 1962; Fain and Johnson 1966)
Sphyrapicus varius, Yellow-bellied sapsucker (Knee et al. 2008)

Diagnostic characteristics:
– anterodorsal apical seta on tarsus IV is a long prominently swollen spike with flexible tip
– subapical ventral setal pair on tarsi II – IV are short blunt-tipped stout spines, most obvious on tarsus IV
– four pairs of setae in the dorsal opisthosomal unsclerotized integument
– paranal setae posterior to anal opening, and postanal seta present

References:
Estebanes-Gonzalez, M.L. 1997. Acarofauna en nidos de aves silvestres
        en Mexico. Acta Zoologica Mexicana, 71: 1-15.Fain, A., and Johnson, D.E. 1966. Nouveaux acariens nasicoles d’oiseaux
        nord-americains (Acari: Rhinonyssidae). Bulletins de la Societe Royal de Zoologie
        d’Anvers, 38: 25-41.Hyland, K.E. 1962. Two new nasal mites, Ptilonyssus morofskyi, n.sp., and
        Sternostoma porteri n.sp., from North American birds (Acarina; Rhinonyssidae).
        Bulletin of the Brooklyn Entomological Society, 57: 146-156.Knee, W., Proctor, H., and Galloway, T. 2008. Survey of nasal mites (Rhinonyssidae, Ereynetidae,
        and Turbinoptidae) associated with birds in Alberta and Manitoba, Canada. Canadian Entomologist,
        140
: 364-379.Pence, D.B. 1972. The nasal mites of birds from Louisiana II. The genus
        Sternostoma (Dermanyssidae: Rhinonyssinae). Journal of Parasitology, 58: 781-889.
Pence, D.B. 1975. Keys, species and host list, and bibliography for nasal mites of
        North American birds (Acarina: Rhinonyssinae, Turbinoptinae,
        Speleognathinae, and Cytoditidae). Special Publications of the Museum Texas
        Tech University, 8: 1-148.
Pence, D.B., and Casto, S. 1975. Two new species and new records of nasal mites
        of the genus Sternostoma (Acarina: Rhinonyssinae) from birds in Texas.
        Journal of Parasitology, 61: 360-368.

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