Orosius cellulosus (Lindberg)

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 : 45-46

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 ).

Figures

FIGURES 1–20. Genus Orosius spp., 1‾4. O. aegypticus Ghauri, 1966 stat. rev., 1, dorsal view; 2, lateral view; 3, dorsal view of head and thorax; 4, face; 5‾8. O. albicinctus Distant 1918, 5, dorsal view; 6, lateral view; 7, dorsal view of head and thorax; 8, face; 9‾12. O. cellulosus (Lindberg, 1927), 9, dorsal view; 10, lateral view; 11, dorsal view of head and thorax; 12, face; 13‾20, O. viraktamathi sp. n., 13, dorsal view (from KSA); 14, lateral view (from KSA); 15, dorsal view of head and thorax (from KSA); 16, face (from KSA), 17, dorsal view (from Oman); 18, lateral view (from Oman); 19, dorsal view of head and thorax (from Oman); 20, face (from Oman).

FIGURES 21–32. 21‾23. O. aegypticus Ghauri, 1966 stat. rev., 21, Aedeagus dorsal view, 22, Lateral view; 23, Connective; 24‾26. O. albicinctus Distant 1918, 24, Aedeagus dorsal view, 25, Lateral view; 26, Connective; 27‾29. O. cellulosus (Lindberg, 1927), 27, Aedeagus dorsal view, 28, Lateral view; 29, Connective; 30‾32. O. viraktamathi sp. n., 30, Aedeagus dorsal view, 31, Lateral view; 32, Connective.

FIGURES 33–44. 33‾35. O. aegypticus Ghauri, 1966 stat. rev., 33, Style, 34, Subgenital plate; 35, Pygofer; 36‾38. O. albicinctus Distant 1918, 36, Style, 37, Subgenital plate; 38, Pygofer; 39‾41. O. cellulosus (Lindberg, 1927), 39, Style, 40, Subgenital plate; 41, Pygofer; 42‾44. O. viraktamathi sp. n., 42, Style, 43, Subgenital plate; 44, Pygofer.

FIGURES 45–56. 45‾47. O. aegypticus Ghauri, 1966 stat. rev., 45, Anal tube, 46, Valve; 47, ♀ 7th sternite; 48‾50. O. albicinctus Distant 1918, 48, Anal tube, 49, Valve; 50, ♀ 7th sternite; 51‾53. O. cellulosus (Lindberg, 1927), 51, Anal tube, 52, Valve; 53, ♀ 7th sternite; 54‾56. O. viraktamathi sp. n., 54, Anal tube, 55, Valve; 56, ♀ 7th sternite.

FIGURES 57–62. 57‾58. Distribution of Orosius spp, 57, World distribution, 58, Local distribution; 59‾62. Habitats of Orosius spp. 59, Type locality: Rhodet Khorim, KSA. 60, Type locality: Al Aflag, Al Naifiyah, Farshet Sheaal, KSA. 60, Baha: Shada Al Ala Protectorate, KSA. 62, Type locality: Al-Dakheliah Gov., Samail, Al-Afiah, Oman.