Nemestrinus aegyptiacus Wiedemann, 1828

El-Hashash, Arafa Elsayed, Badrawy, Haitham Badrawy Mousa & Ibrahim, Ayman Mohyie-Eldin, 2021, A review of tangle-veined flies (Nemestrinidae, Diptera) in Egypt, ZooKeys 1071, pp. 11-42 : 11

Nemestrinus aegyptiacus Wiedemann, 1828

Figures 1 , 4-13 , 14-22

Nemestrinus aegyptiacus Wiedemann, 1828: 249.

Nemestrinus tripolitana Lichtwardt, 1907: 443.

Nemestrinus jullieni Efflatoun, 1925: 357.

Type material.

Nemestrinus aegyptiacus : Syntype female, without date, Egypt (ZMHB) (pers. comm., Mr. Sven Marotzke). Nemestrinus jullieni : Type W. Hoff 29°53'02.6"N, 31°18'42.2"E, 15.iii.1922, Helwan 29°50'37.6"N, 31°19'05.0"E, 20.iii.1925; Lectotype male "W. Hoff 29°53'02.6"N 31°18'42.2"E, 23.iii.1922", Egypt (formerly ESEC, destroyed by dermestid beetles).

Specimens examined.

N. aegyptiacus : Burg El-Arab 30°54'12.7"N, 29°33'13.7"E, 25.iii.1927 (1 f#), 25.iii.1934 (1 m #); Helwan 29°50'37.6"N, 31°19'05.0"E, 17.iii.1934 (1 f#), 16.iii.1935 (1 f#); W. dar El Maskhara 29°47'02.9"N, 31°24'59.9"E, 11.iv.1927 (1 f#); W. Garawi 29°47'43.9"N 31°25'54.9"E, 22.iii.1930 (1 f#), 31.iii.1930 (1 m #); W. Hoff 29°53'02.6"N, 31°18'42.2"E, 10.iii.1930 (2 m #) (AZUC); Abu Rawash 30°04'30.7"N, 31°11'59.7"E, 7.iii.1955 (9 m #), 8.iii.1955 (3 m # & 1 f#), 13.iii.1955 (4 m # & 3 f#), 17.iii.1955 (5 m # & 4 f#), 20.iii.1955 (2 m # & 5 f#); Giza 30°00'40.0"N, 31°11'31.4"E, 22.iii.1954 (1 m #) , 17.v.1955 (1 m #) ; Helwan 29°50'37.6"N, 31°19'05.0"E, 17.iii.1934 (1 m #), 20.iii.1934 (1 m #) , 3.iv.1934 (1 f#); Ogret El-Sheik 29°52'50.1"N, 31°18'27.8"E, 25.ii.1927 (1 m #); W. Garawi 29°47'43.9"N 31°25'54.9"E, 25.iii.1932 (1 f#); W. Rishrash 29°27'51"N, 31°22'2"E, 29.iii.1935 (1 f#); W. Silly Helwan 29°50'37.6"N, 31°19'05.0"E, 19.iii.1926 (1 f#); Ain Mousa 29°52'22.0"N, 32°39'00.7"E, 16.iii.1925 (2 f#) (CUC); Asyut (Lentil) 27°23'00.0"N, 31°44'38.0"E, 3.iii.1965 (2 m # & 6 f#) ; Ogret El-Sheik 29°52'50.1"N, 31°18'27.8"E, 21.iii.1926 (2 f#); Burg El-arab 30°54'12.7"N, 29°33'13.7"E, 25.iii.1927 (1 m #), 9.iii.1928 (1 m #) ; Kafr Hakim 30°04'39.7"N, 31°06'46.3"E, 24.iii.1924 (1 m #); Gerga (Eg. Lupia) 26°20'23.2"N, 31°53'21.3"E, 2.iv.1965 (2 f#); W. Hoff 29°53'02.6"N, 31°18'42.2"E, 21.iii.1922 (1 f#), 22.iii.1927 (1 m #); W. Morrah 22°22'39.1"N, 33°46'00.3"E, 25.iii.1921 (1 m #); W. Silly Helwan 29°50'37.6"N, 31°19'05.0"E, 23.iii.1926 (1 m #), 25.iii.1927 (2 f#) (MAC); Abu Mena 30°50'28"N, 29°39'49"E, 15.iii.1953 (1 m #), 8.iv.1954 (3 m #) ; Gabal Asfar 30°12'05.7"N 31°21'19.7"E, 9.iii.1951 (1 f#), 19.iii.1951 (1 f#); Kerdasa 30°01'32.1"N, 31°06'27.5"E, 14.iv.1951 (1 f#), 20.iii.1952 (1 f#) (ASUC); (1 m #), without data (NHMW) sent by Dr. Peter Sehnal; Egypt (1 f#), without date, (ZMHB) sent by Mr. Sven Marotzke and Bernhard Schurian; Cairo, Shoubra , 30°4'27.1632"N, 31°14'53.9844"E, 28.iii.1921 (1 m #) , specimen number USNMENT01371555 (USNM) (identified by Dr. Torsten Dikow ) .

Specimens previously identified as N. julieni : Abu Rawash 30°04'30.7"N, 31°11'59.7"E, 7.iii.1955 (1 m #) , 8.iii.1955 (1 m #) , 13.iii.1955 (1 m #); Burg El-Arab 30°54'12.7"N, 29°33'13.7"E, 25.iii.1934 (4 m # & 4 f#) ; W. Garawi 29°47'43.9"N, 31°25'54.9"E, 25.iii.1932 (2 f#), 21.iii.1930 (1 f#) ; W. Hoff 29°53'02.6"N, 31°18'42.2"E, 28.ii.1927 (1 m #) ; W. Um Elek 29°52'59.9"N, 31°31'00.1"E, 21.iii.1924 (1 f#) (CUC) ; Ain Mousa 29°52'22.0"N, 32°39'00.7"E, 16.iii.1925 (2 f#) ; Asyut ( Lentil ) 27°23'00.0"N, 31°44'38.0"E, 3.iii.1965 (1 m # & 2 f#) ; Burg El-Arab 30°54'12.7"N, 29°33'13.7"E, 14.iv.1920 (1 m #) , 16.ii.1922 (1 f#), 12.iv.1923 (1 f#), 11.iv.1925 (1 m #) , 18.iv.1925 (1 f#); Kafr Hakim 30°04'39.7"N, 31°06'46.3"E, 20.iv.1925 (1 f#) ; W. Garawi 29°47'43.9"N, 31°25'54.9"E, 14.iv.1928 (1 f#) ; W. Morrah 22°22'39.1"N, 33°46'00.3"E, 25.iii.1927 (1 f#), W. Silly Helwan 29°50'37.6"N, 31°19'05.0"E, 19.iii.1926 (2 f#), 22.iii.1926 (1 f#), W. Um Elek 29°52'59.9 ’’ N, 31°31'00.1"E, 21.iii.1924 (1 f#) (MAC) ; Kosseir 26°06'26.2"N, 34°16'38.8"E, 24.ii.1965 (1 m #) ; W. Digla 29°59'00.1"N, 31°19'41.2"E, 5.iv.1952 (1 f#), 13.iii.1955 (1 m #) ; W. Natroun 30°25'58.2"N, 30°14'39.2"E, 13.iii.1955 (3 f# & 1 m #), (2 m # & 1 f#), without data (ASUC) .

Diagnosis.

Frons and face entirely yellow or grayish pollinosity; thorax completely shiny black with yellowish hairs; wing with many small cells restricted between R2 and hind margin; abdomen entirely black with short erect hairs. Male genitalia with only outer gonocoxal process; gonocoxal apodemes long, narrow, sinuate, fused medially and forming a narrow dorsal bridge; gonostyli wider than gonocoxal processes, ventrally with a cleft and small projection. Aedeagal complex with tapered aedeagus and lateral parameres, which are usually separated apically, fused with basal part of the aedeagus; parameral apodeme rather long; ejaculatory apodeme long and broad.

Redescription.

Length: male body 14-17 mm, wing 13.5-15 mm. Female body 14-20 mm, wing 13.5-16.5 mm. Head wider than thorax; frons with yellow or grayish yellow pollinosity, with rather long hairs, at antennal elevation frons wide but narrowing toward vertex; face relatively shorter than high, with dull pollinosity, its hairs similar to those of the frons (Figs 4-6 , 14-16 ); antenna entirely blackish brown to black, scape and pedicel with long hairs (Figs 7 , 17 ). Thorax shiny black; mesonotum with dense pale yellow hairs but rather long; pleurae with tuft-like hairs. Leg hairy, yellowish brown with black femora. Wing smoky brown, except apex and posterapical margin clear and transparent (Figs 8 , 18 ). The differences in cell number and structure on the wing is continuous variation and inconsistently different between males and females. Abdomen entirely shiny black, covered with yellowish pubescence except the venter is blackish, which is rather short and erect, excluding dorsal side of two basal segments and on lateral margins of second segment where it is much longer and tufted, also on hind margin of each segment appear as narrow light bands (Figs 9 , 19 ). Male genitalia with only outer gonocoxal process; gonocoxal apodemes long, narrow, sinuate, fused medially, and forming a narrow dorsal bridge; gonostyli wider than gonocoxal processes, ventrally with a cleft and small projection (Figs 10 , 11 ). Aedeagal complex with tapered aedeagus and lateral parameres, which are usually separated apically, fused with basal part of aedeagus; parameral apodeme rather long; ejaculatory apodeme long and broad (Figs 12 , 13 ). Female genitalia with subgenital plate rectangular with two hairy lobes (Fig. 20 ); genital furca free, narrow, with broadened ends of posterior projections, bent medially; median aperture of genital furca nearly triangular (Fig. 21 ); uterus rounded, with two narrow and rather long spermathecae (Fig. 22 ).

Local distribution.

Coastal strip, Lower Nile.

Geographical distribution.

Algeria, Egypt, Libya, Morocco, Italy (Sicily), and Tunisia ( Sack 1933; Bernardi 1973; Richter 1988).

Remarks.

After examining the female type specimen of Nemestrinus aegyptiacus (Fig. 1 ) and comparing it with a large series of specimens identified as Nemestrinus jullieni Efflatoun (some specimens were by seen by him but it is not clear who determined the identification), we confirm this identification, and it is clear that both are the same species. Hence, N. julieni is placed as a synonym instead of a subspecies based on examination of the series of specimens and dissections of genitalia of both N. aegyptiacus and N. julieni and the female type specimen of N. aegyptiacus , and comparisons with the genitalia figures of Bernardi’s (1973: figs 54-56) N. aegyptiacus .

Figures

Figure 1. Nemestrinus aegyptiacus, female syntype A dorsal view B lateral view C frontal view D ventral view E labels (Zmhb).

Figures 4 - 13. Male of Nemestrinus aegyptiacus, head, frontal (4), head, dorsal (5), head, lateral (6), antenna (7), wing (8), abdomen (9). 10 - 13 male genitalia: epandrium, proctiger, and cerci (10), gonocoxite with gonostylus, ventral (11), aedeagal complex, lateral (12) and dorsal (13). Abbreviations: aedg. aedeagus, aec. aedeagal complex, aedg tn. aedeagal tine A 2. anal vein, al. alula, ant. Antenna, bm. basal medial cell, br. basal radial cell, c. cerci, C. costa, CuA 1,2, CuP. cubital veins, d. discal cell, db. dorsal bridge, DV. diagonal vein, e. epandrium, ej. ejaculatory apodeme, enaedg pr. endoaedeagal process, fc. Face, 1 st fl. first flagellomere, fr. Frons, gap. gonocoxal apodeme, gc. gonocoxite, gpr. gonocoxal process, gs. gonostylus, h. hypandrium, h. humeral cross vein, lat ej pr. lateral ejaculatory process, m 3. third medial cell, pm. parameres, pm ap. parameral apodeme, pr. proctiger, pt. phallic plate, M 1, M 2, M 3. medial veins, m-cu. cross vein between medial and cubital veins, pd, pedicel, plp. Palpus, R 1, R 2, R 3 + 4, R 5, Rs. radial veins, r-m. cross vein between redial and medial veins, Sc. subcostal vein, sc. Scape, st. stylus, vt. vertex.

Figures 14 - 22. Female of Nemestrinus aegyptiacus, head, frontal (14), head, dorsal (15), head, lateral (16), antenna (17), wing (18), and abdomen (19). 20 - 22 female genitalia: subgenital plate (20), genital furca (21), and spermathecae (22). Abbreviations: ma. median aperture, pl. posterolateral projection, sp. spermatheca, spd. spermathecal duct, ut. uterus.