Systenus Loew, 1857

Ramos-Pastrana, Yardany, Merchan-Vargas, Geraldine Lucia & Soares, Matheus M. M., 2024, First record of the genus Systenus Loew (Diptera: Dolichopodidae) from Colombia, with description of four new species, Zootaxa 5514 (3), pp. 257-272 : 258

publication ID	https://doi.org/ 10.11646/zootaxa.5514.3.3
publication LSID	lsid:zoobank.org:pub:D745608E-E51C-401E-A1A1-3573A24C51BD
DOI	https://doi.org/10.5281/zenodo.13849922
persistent identifier	https://treatment.plazi.org/id/03A71175-FFCB-3C6D-CB96-6A8E81E2FAC2
treatment provided by	Plazi
scientific name	Systenus Loew
status

Treatment

Genus Systenus Loew View in CoL

Systenus Loew, 1857: 34 View in CoL .

Type species, Rhaphium adpropinquans Loew, 1857 View in CoL (= Rhaphium pallipes Roser, 1840 View in CoL ), des. Foote et al. 1965: 517.

Diagnosis. The genus is easily recognized by the males with postpedicel triangular or subrectangular at base, elongate about 2–4 times longer than basal width, slightly to strongly tapered at apical 1/2 to 2/3 ( Figs 1B View FIGURE 1 , 2B View FIGURE 2 , 3B View FIGURE 3 , 4B View FIGURE 4 ); proepisternum with 1 pale seta ( Figs 3B View FIGURE 3 , 4B View FIGURE 4 ); R 4+5 and M 1 subapically bowed, M 1 beyond dm-m crossvein with flexion ( Fig. 1D View FIGURE 1 ); six strong dorsocentral setae ( Fig. 1C View FIGURE 1 ); abdominal segment 7 with tergite and sternite distinctly elongate, forming a peduncle ( Figs 2C View FIGURE 2 , 3C View FIGURE 3 , 4C View FIGURE 4 ); only one single lobe of the surstylus is present ( Figs 1F View FIGURE 1 , 2F View FIGURE 2 , 3F View FIGURE 3 , 4F View FIGURE 4 ). See Bickel (1986, 2015) for a complete diagnosis.