Pionopsis Piersig, 1894

Smith, Ian M., Cook, David R. & Gerecke, Reinhard, 2015, Revision of the status of some genus-level water mite taxa in the families Pionidae Thor, 1900, Aturidae Thor, 1900, and Nudomideopsidae Smith, 1990 (Acari: Hydrachnidiae), Zootaxa 3919 (1), pp. 111-156 : 126-127

publication ID

https://doi.org/ 10.11646/zootaxa.3919.1.6

publication LSID

lsid:zoobank.org:pub:F711CA99-1B2C-4E18-9F4B-7521D38D2303

DOI

https://doi.org/10.5281/zenodo.6109850

persistent identifier

https://treatment.plazi.org/id/03DA87C4-FF87-1777-FF4C-6CB4A8DDFC0D

treatment provided by

Plazi

scientific name

Pionopsis Piersig, 1894
status

 

Genus Pionopsis Piersig, 1894 View in CoL

Pionopsis View in CoL (in part): Cook, 1974a, pp. 283, 284, figs. 1183–1185. Pionopsis: Smith, 1976 View in CoL , pp. 46–47, 83–85, 90, 92.

Tiphys View in CoL (in part): Wainstein, 1980, pp. 194–195, figs. 654–660. Pionopsis: Smith & Cook, 1991 View in CoL , pp. 554, 579.

Pionopsis: Smith et al., 2001 View in CoL , pp. 582, 615, fig. 334.

Pionopsis: Smith et al., 2010 View in CoL , pp. 524, 556, fig. 15.335.

Diagnosis. Larva: (modified from Wainstein 1980). Character states of the subfamily Tiphyinae. Third coxal plate with transverse muscle attachment scar present. Excretory pore plate nearly circular with setae ps1 well anterior to setae ps2; excretory pore sessile.

Adults (modified from Smith 1976): Character states of subfamily Tiphyinae. Fourth coxal plates with large, anteriorly concave projections covering insertions of fourth legs. Pedipalp with segments relatively long and slender and with tibia bearing a long, blade-like seta distomedially on a moderately prominent projection. Genital field bearing three pairs of acetabula. Males with genital acetabula relatively close together and borne on triangular acetabular plates that are fused posterior to gonopore but separate anterior to gonopore, and do not extend laterally beyond posteromedial angles of fourth coxal plates; second leg with tibia lacking two spatulate setae distoventrally; fourth leg with genu slightly expanded and bearing three thick swimming setae distoposteriorly, tibia slightly expanded and bearing a row of closely-spaced thickened setae posteriorly and a bulbous seta distoposteriorly. Females with genital acetabula relatively widely separated from one another and borne on triangular acetabular plates, and with second and third acetabula on each side not forming a row near posterior edge of plate that is nearly at right angles to long axis of idiosoma.

Type species. Hydrachna lutescens Hermann.

Species included. Pionopsis lutescens (Hermann) (Europe) , P. fragilis Habeeb (North America), P. japonensis Imamura ( Japan) , P. latilamellis Marshall (western North America), P. paludis Habeeb (eastern North America).

Distribution. Holarctic (Eurasia, North America).

Discussion. Cook (1974a) treated Pionopsis as a genus that included Neotiphys as a subgenus. Smith (1976) considered Pionopsis and Neotiphys to be separate genera and this treatment was followed by Smith & Cook (1991), Smith et al. (2001, 2010), and by us here.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Trombidiformes

Family

Pionidae

Loc

Pionopsis Piersig, 1894

Smith, Ian M., Cook, David R. & Gerecke, Reinhard 2015
2015
Loc

Pionopsis:

Smith et al. 2010
2010
Loc

Pionopsis:

Smith et al. 2001
2001
Loc

Pionopsis:

Smith & Cook 1991
1991
Loc

Pionopsis:

Smith 1976
1976
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