Ptilonyssus nivalis Knee, 2008
Fig 102 (a). Ptilonyssus nivalis female dorsal habitus.
Fig 102 (b). Ptilonyssus nivalis female dorsum.
Fig 102 (c). Ptilonyssus nivalis female venter.
North American host records:
Emberizidae:
Plectrophenax nivalis,
Snow Bunting
(Knee et al. 2008)
Diagnostic characteristics:
- two dorsal
shields, podosomal and fused opisthosomal and pygidial shields
- posterior margin of podosomal shield is trilobed
- opisthosomal shield is longer than wide, but not twice as long as wide
- lateral excavation of the posterior portion of the opisthosomal shield
- posterior margin of opisthosomal shield is invaginated forming an inverted V
indent
- anterior margin of opisthosomal shield is straight
- st1 st2 and st3 on the sternal shield
- subapical ventral setal pair on tarsus IV are relatively long, one strong spike and
one filamentous spike
- six pairs of ventral opisthosomal setae
- three pairs of mesolateral setae
- mesolateral setae all approximately equal in length, there are not two pairs
of setae that are twice as long as another setal pair
- subposterior
pair of dorsal podosomal setae are less than half the
length of the longest mesolateral setae
- paranal setae anterior to anal opening, paranal and postanal setae are unequal in
length
References:
Knee, W. 2008.
Five new species of Rhinonyssidae (Mesostigmata) and one new species of
Dermanyssus
(Mesostigmata: Dermanyssidae) from
birds of Alberta and Manitoba, Canada. Journal of Parasitology,
94: 348-374.
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.