Arenivaga umbratilis, Hopkins, Heidi, 2014

Hopkins, Heidi, 2014, A revision of the genus Arenivaga (Rehn) (Blattodea, Corydiidae), with descriptions of new species and key to the males of the genus, ZooKeys 384, pp. 1-256 : 119-121

Arenivaga umbratilis sp. n. Figures 152-154

Type locality.

USA, Arizona, Maricopa County, Phoenix.

Material examined.

Holotype: ♂ in ANSP labeled "Phoenix, X.9.03, Ariz. Kunze, Hebard Collection" "HOLOTYPE Arenivaga umbratilis Hopkins, 2012" [red label with black border].

Paratypes: None at this time.

Etymology.

This species is named from the Latin phrase meaning "in retirement", as there is only one specimen of this species and it was collected in 1903. I strongly suspect this is either a hybrid, or an extinct species.

Distribution.

This species is known only from the type locality. See Fig. 154.

Diagnosis.

Arenivaga umbratilis has the external appearance of Arenivaga tonkawa but the genitalia of Arenivaga pratchetti . This species will be known when, upon genitalic dissection, a specimen has the genitalia of Arenivaga pratchetti but a subgenital plate with rounded apices. Arenivaga pratchetti has pointed apices on its subgenital plate (See Fig. 7). See Figs 153 and 127.

Description.

Male.Measurements. Holotype TL = 21.0 mm, GW = 10.0 mm, PW = 6.27 mm, PL = 4.58 mm, TL/GW = 2.10, PL/PW = 0.73. EW = 0.20 mm; OW = 0.50 mm.

Head. Two ocelli very large, ovoid and protruding (0.40 × 0.30 mm); vertex medium brown with small ridges in rays around upper apices of eyes and extending onto ocellar tubercles; interocellar space concave, smooth, medium brown, paler medially with two triangular shaped indentations. Frons very light brown fading to waxy white; posterior frons mildly concave, bound on either side by ridges extending from inner apex of ocelli outwards to lateral edges of clypeus; ridges with occasional long setae. Anterior portion of frons bulbous; clypeal suture demarcates waxy white smooth anteclypeus; no setae apparent. See Fig. 152d.

Pronotum. Pronotum translucent, waxy beige; variable length orange-brown setae along anterior margin; dorsal surface of pronotum thickly encrusted with sand and specimen too fragile to clean so surface setae undetectable; pronotal pattern light orange-brown to yellow "panther face" with no detail or aura. See Fig. 152c.

Body. Wing brace present. Legs and body light orange-brown. Subgenital plate dissected and cleared; asymmetrical with concave posterior edge and rounded apices. See Fig. 152b.

Forewings. Wings extended well beyond abdominal apex; light orange-brown with light brown blotches; surface matte and opaque. See Fig. 152a.

Genitalia. Right dorsal phallomere composed of bulbous lightly sclerotized hook-shaped lobe, articulated with right ventral phallomere on lateral side; central field lightly sclerotized; medial margin more heavily sclerotized, shagreened with toothed edge and slight thickening centrally creating small bulge along rim. Small central sclerite concave, nondescript in shape, finely punctate with an irregular shagreened projection on internal ventral surface; right ventral phallomere extends from articulation to form smooth rounded structure becoming punctate and narrower anteriorly; attached anteriorly is slightly dorsally projecting flanged concave punctate arm that extends to depth of phallomere; shagreened edge. Folded anterior portion of left phallomere of moderate width, setose, otherwise unmodified. Genital hook with moderate extension to pointed head with short hook. See Fig. 153.

Habitat and natural history.

All life history elements remain unobserved.