Revision of the leafhopper genus Orosius Distant, 1918 (Hemiptera: Cicadellidae: Deltocephalinae: Opsiini) in the Arabian Peninsula with the description of a new species Author El-Sonbati, Saad A. Author Wilson, Michael R. Author Al Dhafer, Hathal M. text Zootaxa 2019 2019-03-07 4565 1 37 48 journal article 28408 10.11646/zootaxa.4565.1.2 fb0b7b8f-cabb-46a7-aef5-9b249a5de564 1175-5326 2589609 028D92EE-D1DA-4224-BF1C-4D8917BABA47 Orosius cellulosus (Lindberg) ( Figs 9–12 , 27–29 , 39–41 , 51–53 ) Thamnotettix cellulosa Lindberg, 1927 : 90 Thamnotettix cellulosus Zachvatkin, 1935:109 – Metcalf, 1967 : 737 Nesophrosyne cellulosa Lindberg, 1958 : 176 Orosius cellulosa Ghauri, 1966 : 239 Nesophrosyne (Orosius) cellulosa Heller & Linnavuori, 1968 : 10 Description. In addition to generic characters, the specific characters for this species are: Body length : 2.5–2.7 mm . Male genitalia : Pygofer narrowed rounded, pointed, with irregular setae over posterior half ( Fig. 41 ); valve is free to pygofer, triangular shape, articulation of valve with pygofer pointed ( Fig. 52 ); subgenital plate with one row of macrosetae near margin, with stout membranous finger-like process on mesal edge of posterior margin ( Fig. 40 ); style bent small fingerlike with preapical lobe, apex straight and pointed ( Fig. 39 ); connective articulated with aedeagus, Y shaped ( Fig. 29 ); anal tube appendages articulated to posterodorsal margin of pygofer laterally, form end like spine, straight and narrowed, arising from base of anal tube ( Fig. 51 ); aedeagal shafts arising from base, Shafts with branches extent with parallel, apices of branches slightly curved inward, pointed, lateral view, shafts curved at their length, branches length 3 times the base ( Figs 27–28 ). Female genitalia: female 7th sternite approximately 3 times as broad at base as long medially, with sinuous posterior margin, posterior margin with lobe with slightly median notch in middle ( Fig. 53 ); numerous macrosetae on pygofer. Specimens examined : 1♀ KSA: Rhodet khorim : 25°22.58’N , 47°16.44’E , 559m , light trap 29. IV. 2012 , S. El-Sonbati, H. Al Dhafer; 1♀ 5♂ , same but 28. VII. 2012 ; 1♂ Deirab : 24°31'50.7"N 46°37'10.5"E , 18. IX. 2014 , S. El-Sonbati; 2♀ 2♂ Al Magardah W. Talalea : 19°02.740’N , 41°46.333’E , 259m , 11. X. 2013 , light trap, S. El- Sonbati; 1♀ Asir , Abha , Raydah : 18°11.749’N , 42°23.345’E , 1614m , 24. II. 2014 , S. El Sonbati, R. Iftekhar; 1♀ , KSA: Al Baha , Shada Al Ala : 19°50.329’N , 41°18.604’E , 1563m , 15. II. 2014 , light trap, H. Al Dhafer, H. Fadl, M. Abdel-Dayem, A. El-Gharbawy, A. El-Torky, S. El Sonbati; 1♀ , same but 19°51.762’N , 41°18.089’E , 1225m , 2. III. 2015 ; 4♂ , same but 21. IV. 2014 ; 1♀ , same but 19°50.411’N , 41°18.686’E , 1611m , 2. IX. 2015 ; 1♀ , same but 19°52.598’N , 41°18.672’E , 892m , 24. IV. 2014 , H. Al Dhafer, S. El-Sonbati; 2♀ 7♂ , Oman : Dhofor , Salalah , Ayn Sahalnoot , 19. XI. 2017 , L. T. 17°08'53.7"N 54°10'41.6"E , Coll. El-Sonbati S. A.; 7♀ , Oman : Dhofor , Salalah, W . Derbate , 17.XI.2017 , L. T. 17°08'08.6"N 54°30'42.3"E , Coll. El-Sonbati S. A. Distribution: Ethiopia ( Heller & Linnavuori, 1968 ), Australia , Russia , Sudan ( Ghauri, 1966 ; Fletcher, et al ., 2016 ); Saudi Arabia (present study). Ecology and biology. O. cellulosus was commonly found in the central and southwestern regions of Saudi Arabia with affinities to Afrotropical region ( Figs 59–61 ). This species is also considered as a vector of phytoplasma diseases. Most of this species were collected by light trap. Diagnosis: O. cellulosus can be distinguished by aedeagus, pygofer, style and spine at base of anal tube: aedeagal shafts curved at their length with curved, pointed apically ( Figs 27 ¯28); pygofer narrowed rounded, pointed ( Fig. 41 ); style, apex straight and pointed ( Fig. 39 ); spine of anal tube straight and narrowed ( Fig. 51 ).