Orosius viraktamathi El-Sonbati & Wilson & Al Dhafer 2019, sp. n.

Orosius viraktamathi El-Sonbati & Wilson sp. n.

(Figs 13–20, 30–32, 42–44, 54–56)

Description. In addition to generic characters, the specific characters for this species are

Body length : 2.5–2.6 mm

Male genitalia: Pygofer marked pointed with slightly curved posteriorly, with irregular setae over posterior half (Fig. 44); valve is free to pygofer, triangular shape, articulation of valve with pygofer pointed (Fig. 55); subgenital plate with one row of macrosetae near margin, with stout membranous finger-like process on mesal edge of posterior margin (Fig. 43); style bent small fingerlike with preapical lobe, apex inflated (Fig. 42); connective articulated with aedeagus, Y shape (Fig. 32); anal tube appendages articulated to posterodorsal margin of pygofer laterally, form end like spine, long and narrowed arising from base of anal tube (Fig. 54); aedeagal shafts arising from base, Shafts branches extent with slightly diverging, apices of branches slightly curved outward, lateral view, shafts abruptly narrowed preapically, branches length 3 times the base, with pointed apex (Figs 30–31).

Female genitalia: female 7th sternite approximately 3 times as broad at base as long medially, with sinuous posterior margin, posterior margin with lobe with median V-shape notch in middle (Fig. 56); numerous macrosetae on pygofer.

Holotype: ♂ KSA: C. 116km S. Dawasir: 20°14'10.2"N 44°49'11.6"E, 4-5. II. 1978, R. Linnavuori (AMNH),

Paratypes: 1♂ 3♀, same locality as Holotype. (AMNH); 3♂ 8♀ Oman: Al-Dakheliah Gov., Samail, Al-Afiah, 23°04'56.5"N 57°49'10.2"E, 22. XI. 2017, A. Al-Subhi; 2♂, same but 10–15. II. 2015; 1♂, same but W. Beni Rawaha, 23°05'43.0"N 57°49'15.0"E, 12. III. 2015, A. Al-Subhi.

Ecology and biology. This species was collected from wadi Al-Dawasir by Linnavuori in February. Later collected from Oman in November and March (Fig. 62). No further more information is known.

Diagnosis: O. viraktamthi sp. n. can be distinguished from other Orosius by: pygofer, aedeagus and spine at base of anal tube. pygofer significantly pointed and slightly curved posteriorly (Fig. 44); shafts of aedeagus abruptly narrower preapically (Figs 30–31); spine at base of anal tube moderately long and slightly regularly curved (Fig. 54).

Etymology. This species is named in recognition of the long and distinguished career of Prof. Chandra Viraktamath, Bangalore, India.