Orosius viraktamathi El-Sonbati & Wilson, 2019

El-Sonbati, Saad A., Wilson, Michael R. & Al Dhafer, Hathal M., 2019, Revision of the leafhopper genus Orosius Distant, 1918 (Hemiptera: Cicadellidae: Deltocephalinae: Opsiini) in the Arabian Peninsula with the description of a new species, Zootaxa 4565 (1), pp. 37-48 : 47

publication ID


publication LSID




persistent identifier


treatment provided by


scientific name

Orosius viraktamathi El-Sonbati & Wilson

sp. n.

Orosius viraktamathi El-Sonbati & Wilson   sp. n.

( Figs 13–20 View FIGURES 1–20 , 30–32 View FIGURES 21–32 , 42–44 View FIGURES 33–44 , 54–56 View FIGURES 45–56 )

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 View FIGURES 33–44 ); valve is free to pygofer, triangular shape, articulation of valve with pygofer pointed ( Fig. 55 View FIGURES 45–56 ); subgenital plate with one row of macrosetae near margin, with stout membranous finger-like process on mesal edge of posterior margin ( Fig. 43 View FIGURES 33–44 ); style bent small fingerlike with preapical lobe, apex inflated ( Fig. 42 View FIGURES 33–44 ); connective articulated with aedeagus, Y shape ( Fig. 32 View FIGURES 21–32 ); 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 View FIGURES 45–56 ); 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 View FIGURES 21–32 ).

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 View FIGURES 45–56 ); 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), GoogleMaps  

Paratypes: 1♂ 3♀, same locality as Holotype. ( AMNH) GoogleMaps   ; 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 GoogleMaps   ; 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 GoogleMaps   .

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 View FIGURES 57–62 ). 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 View FIGURES 33–44 ); shafts of aedeagus abruptly narrower preapically ( Figs 30–31 View FIGURES 21–32 ); spine at base of anal tube moderately long and slightly regularly curved ( Fig. 54 View FIGURES 45–56 ).

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


American Museum of Natural History