Bama (Bama) dichroma, Rodrigues & Mello & Carvalho, 2024

Rodrigues, João Paulo Vinicios, Mello, Ramon Luciano & Carvalho, Claudio José Barros de, 2024, A new species of Bama McAlpine (Diptera, Platystomatidae) from New Guinea, Revista Brasileira de Entomologia (e 20240032) 68 (3), pp. 1-5 : 2-4

publication ID	https://doi.org/10.1590/1806-9665-RBENT-2024-0032
persistent identifier	https://treatment.plazi.org/id/03A54345-C638-7249-BC68-8E4B3056F89F
treatment provided by	Felipe
scientific name	Bama (Bama) dichroma
status	sp. nov.

Treatment

Bama (Bama) dichroma View in CoL sp. nov.

urn:lsid:zoobank.org:act:5F0BFC0F-4B58-41B1-895C-3E5BCC6FFF97 ( Figs. 1 View Figure 1 a-e; Figs. 2 View Figure 2 a-e) Diagnosis: Bama dichroma sp. nov. is similar to B. flexifer , B. gressitti and B.signifer in the presence of a broad costal stripe, covering cells sc, r 1, r 2+3, and r 4+5. It differs from B. gressitti in lacking an infuscate stripe on M 4 and lacking darker dots on R 4+5 and M 1. It differs from B. signifer in having a band on dm-m. It can be distinguished from B. flexifer in having cell r 4+5 completely dark brown with one medial light brown stripe, whereas B. flexifer has hyaline dot near apex of cell r 4+5.

Head: ( Figs.1 View Figure 1 a-c) frons rectangular, longer than wider, dark brown;

two orbital setae, of same size, inner vertical seta convergent, outer vertical seta divergent; ocellar setae reduced, divergent; postocellar setae reduced, erect; silver pruinescence on fronto-orbital plate,

parafacialia, and postgena; pedicel dark brown; postpedicel 2.5 times height of pedicel, covered by whitish microtrichia; arista longer than face, micropubescent; face dark brown; gena about 1/5 height of eye;

clypeus dark brown, short, about height of pedicel; palpus dark brown;

proboscis dark brown.

Thorax: (Figs.: 1a–1b, and 1d) scutum with dark blue-green metallic luster, with lateral borders dark brown; one postpronotal seta; two notopleural setae; one supra-alar seta; one intra-alar seta;

one postalar seta; one prescutellar acrostichal seta; one prescutellar dorsocentral seta; scutellum dark brown, flat, V-shaped in dorsal view;

three scutellar setae, of same size; one anepisternal seta. Legs: coxae yellowish; femora yellowish; tibiae and tarsi dark brown; fore coxa with four setae at distal border of ventral surface; fore femur with row of long setae on distal half ventrally; mid coxa with five setae on ventral surface; mid tibia with one apical spur; hind coxa with two setae on posterior surface, and one seta on anterior surface. Wings

( Fig. 1d View Figure 1 ): hyaline; costal stripe broad, dark brown, covering the cells

sc, r 1, r 2+3, and r 4+5, with one hyaline triangular mark at r-m level, and one hyaline band on cell r 4+5; one light brown band on apex of discal cell, covering dm-m; Sc straight, incomplete but ending near C; R 1 straight; R 2+3 sinuous at r-m level; second segment of M 1 sinuous; Rs with fine microtrichia dorsally; R 1 and R 4+5 setulose dorsally; lower calypter reduced to linear fringe; halter with base of rod brown, apical part and knob pale yellow.

Abdomen: ( Fig. 1e View Figure 1 ) oval; dark brown, with metallic blue green luster; sparsely covered by whitish microtrichia; female with tergite 3 longer than tergites 4–5; male tergite 5 with three lateral marginal setae. Male terminalia: ( Figs. 2 View Figure 2 a-d) in lateral view, epandrium round, covered by setae ( Fig. 2a View Figure 2 ); cercus globose, covered by setae; lateral as long as epandrium, with setae at apex; inner surstylus shorter than lateral surstylus; one apical prensiseta, fang like in ventral view ( Fig.2b View Figure 2 ); cercus bilobate; ejaculatory apodeme fanlike ( Fig.2c View Figure 2 ); aedeagus cylindrical; preglans reduced; glans well developed, half as wide as long, without process or lobe; terminal filaments Y-shaped, unequal size, the longer one about the same width of glans; ( Fig. 2d View Figure 2 ). Female terminalia: ( Fig. 2e View Figure 2 ) oviscape conical, length and width similar; taenia longer than oviscape; eversible membrane with scale-like denticles; sternite 8 narrow and pointed; cercus fused, with two setae; three (2+1) spermathecae, drop-like, atrium reduced, basal disc absent.

Sexual dimorphism Substantial sexual dimorphism was not observed in the specimens studied.

Type Material: Holotype female and six paratypes, two males and four females, all deposited at the Natural History Museum, London.

Paratypes with same data as holotype, except:(4) NHMUK 013444733 About NHMUK , and (6) PARATYPE (female); (4) NHMUK 013444734 About NHMUK , and (6) PARATYPE (female); (4) NHMUK 013444735 About NHMUK ,and (6) PARATYPE (female); (4) NHMUK 013444737 About NHMUK , and (6) PARATYPE (male); (4) NHMUK 013444738 About NHMUK , and (6) PARATYPE (female); (4) NHMUK 013444740 About NHMUK , and (6) PARATYPE (male).

Distribution: Papua New Guinea, Finisterre Mountains ( Fig. 3).

Etymology: The epithet dichroma is formed from the union of di= two and chroma= color, Greek, an allusion of the wing pattern, half wing dark brown and half hyaline. Gender neutral.