Gongrosargus, Lindner

Hauser, Martin, Woodley, Norman E. & Fachin, Diego A., 2017, Taxonomic changes in African Stratiomyidae (Diptera), Zootaxa 4263 (1) : -

Genus GONGROSARGUS Lindner

Gongrosargus Lindner, 1959: 90 . Type species, Gongrosargus stuckenbergi Lindner, 1959 , by original designation. Dinosargus Lindner, 1968: 9 . Type species, Dinosargus lateritius Lindner, 1968 , by monotypy. Syn. nov.

Gongrosargus glaucus (Bigot) . Afrotropical: Madagascar.

Sargus ? glaucus Bigot, 1859: 134 . HT? [MNHN, lost]: Madagasgar: Nossi-Bé. Gongrosargus distinguendus Lindner, 1966b: 11 . ST 1 ♀ [MNHN]: Madagascar: Andranofotsy; ST 1 ♂ [MRAC], 1 ♀ [SMNS]: Madagascar: Maroantsetra. Syn. nov.

The type specimen of Bigot’s Sargus glaucus is lost and the species is treated under Ptecticus in the world catalog ( Woodley 2001: 212). From the description, we can place this species clearly in the genus Gongrosargus , because of the description of the thorax, being green with three brown stripes, the scutellum being black at the base and green at the apex, and the hind tarsi having a black basitarsus and the rest being white. This combination of characters is not found in any Ptecticus species from Madagascar, which are all uniformly brown or dull yellow, but fits perfectly with G. distinguendus Lindner 1966 , with which we are synonymizing it. We have studied all syntypes of G. distinguendus , the male syntype from MRAC is pictured in Fig. 18 .

Gongrosargus flavipennis (Macquart) . Comb. nov.

Sargus flavipennis Macquart, 1838: 200 . HT ♂ [MNHN]: Madagascar. Ptecticus flavipes: Loew, 1860: 77 . Incorrect subsequent spelling.

We have studied the male holotype [MNHN] ( Fig. 19 ), and the species fits well with the concept of Gongrosargus .

Gongrosargus lateritius (Lindner) . Comb. nov.

Dinosargus lateritius Lindner, 1968: 9 . HT ♂ [MNHN]: Madagascar: Ivondro.

We have studied the male holotype [SMNS] ( Fig. 20 ), and the species fits well with the concept of Gongrosargus .

Gongrosargus limbatus (Macquart) . Comb. nov.

Sargus limbatus Macquart, 1838: 201 . HT ♂ [MNHN]: Madagascar.

We have studied the male holotype [MNHN] ( Fig 21 ), and the species fits well with the concept of Gongrosargus . This species might be conspecific with G. stuckenbergi , but because of the poor condition of the holotype and we know of several undescribed species close to G. stuckenbergi , we are not formally synonymizing the two species.

Gongrosargus pallidus (Macquart) . Comb. nov.

Sargus pallidus Macquart, 1838: 202 . ST 1 ♂ [MNHN], ♀ [ MNHN, lost]: Madagascar .

Gongrosargus univittatus Lindner, 1966b: 12 . ST 1 ♀ [MNHN], 1 ♀ [MRAC]: Madagascar: Famponambo. Syn. nov.

Gongrosargus exclamationis Lindner, 1968: 11 . ST 1 ♂ [ SMNS]: Madagascar: Ivondro, ST 1 ♂ [ MNHN]: Madagascar: Fort Dauphin ; ST 1 ♂ [ MNHN]: Madagascar: Mt. Tsaratanana , Andampy, 750 m. Syn. nov.

We have studied the male syntype of Sargus pallidus [MNHN] ( Fig. 22 ), and the species fits well with the concept of Gongrosargus . The species was listed under the “unplaced species of Sarginae ” in Woodley (2001: 232). Lindner likely never checked Macquart’s types. He considered S. pallidus to belong in “ Chrysochroma ” rather than Gongrosargus , because in Lindner’s collection [SMNS] there are two males of Ptectisargus punctum ( Lindner, 1968) misidentified under the name Gongrosargus pallidus . Ptectisargus punctum has the same color pattern (yellow-orange with a black stripe on the thorax) as G. pallidus , but has a clearly different wing venation. When Lindner described G. univittatus ( Fig. 23 ), he did not compare it with G. pallidus , because he did not consider them congeneric. We examined both female syntypes (MNHN, MRAC) [ Woodley (2001: 191) stated incorrectly that the “holotype” was in Paris], and they are both conspecific with G. pallidus . Only two years later Lindner (1968) described G. exclamationis ( Fig. 24 ) without comparing it to G. univittatus . We examined two of the three male syntypes of G. exclamationis [MNHN, MRAC] and they are all conspecific with G. pallidus . We have at least three undescribed Gongrosargus on hand, which have a color pattern similar to that of G. pallidus from Madagascar.

Figures

FIGURES 13 – 18. Stratiomyidae habitus. 13. Hermetia pectoralis Wiedemann, female holotype. 14. Cormacantha grisea Séguy, female holotype. 15. Cyphomia pubiventris Rondani, female holotype (photos by A. Raspi & N. Maio). 16. Chrysochroma lapidis Lindner, male syntype [MNHN]. 17. Chrysochroma latum Lindner, female holotype [MNHN]. 18. Gongrosargus distinguendus Lindner, male syntype [MRAC].

FIGURES 19 – 24. Stratiomyidae habitus. 19. Sargus flavipennis Macquart, male holotype [MNHN]. 20. Dinosargus lateritius Lindner, male holotype [SMNS]. 21. Sargus limbatus Macquart, male holotype [MNHN]. 22. Sargus pallidus Macquart, male holotype [MNHN]. 23. Gongrosargus univittatus Lindner, female syntype [MRAC]. 24. Gongrosargus exclamationis Lindner, male holotype [SMNS].