Description of four new species of the Neotropical Micropotamia Carvalho (Diptera, Muscidae) Author Jorge, Stela Costa The Graduate Program in Entomology, Universidade Federal do Paraná, Curitiba, Brazil Author Carvalho, Claudio José Barros De Department of Zoology, Universidade Federal do Paraná, Curitiba, Brazil text Zootaxa 2024 2024-06-17 5471 1 67 82 http://dx.doi.org/10.11646/zootaxa.5471.1.4 journal article 298730 10.11646/zootaxa.5471.1.4 28a4af56-5dc4-4f24-909c-be862daf7306 1175-5326 12189587 7F2576E4-08A8-40CC-A610-5847F689DB83 Micropotamia ditissima sp. nov. ZooBank: urna:lsid:zoobank.org:act: ED54E84C-151F-47D4-8500-DA9EB7A57C82 ( Figs. 5, 6 , 15 , 23 , 31 , 39 , and 48) Diagnosis . Three pairs of frontal setae, 1st and 3rd pairs strong; acrostichal setae with 3–4 series of misaligned post-sutural setae; 2 supra-alar setae, 2 nd seta similar to prealar seta; 2 post-supra-alar setae; hind femur swollen, AV surface with 12 misaligned setae curved at apex, V surface with 5 misaligned setae curved at apex; posterior tibia on the AD surface with 3 median setae, apical seta 1. Description . Male ( holotype ): length: body: 3.5 mm, wing: 3 mm . Paratypes : male: body length: 3–4 mm . Coloration. Head. Fronto-orbital plate with black background with grayish pruinosity. Antenna brown. Arista brownish with base yellowish. Lunule brownish. Thorax with brownish gray pruinosity. Wing darkened on costal region. Legs brown. Fore tibia brown or yellowish. Mid-tibia brown. FIGURES 17–20. Fifth sternite of male, dorsal view. (17) Micropotamia amazonica ( Albuquerque & Lopes, 1982 ) ; (18) M. cilitibia (Albuquerque, 1955) ; (19) M. fuscisquama (Wulp, 1896) ; (20) M. minuscula (Albuquerque, 1955) . Scale 0.1 mm. FIGURES 21–24. Fifth sternite of male, dorsal view. (21) Micropotamia stellaria sp. nov . ; (22) M. ananas sp. nov . ; (23) M. ditissima sp. nov . ; (24) M. fortuna sp. nov . Scale: 0.1 mm. FIGURES 25–28. Cercal plate, epandrium and surstylus, dorsal view. (25) Micropotamia amazonica ( Albuquerque & Lopes, 1982 ) , (a) cercal plate, (b) surstylus; (26) M. cilitibia (Albuquerque, 1955) ; (27) M. fuscisquama (Wulp, 1896) , (a) cercal plate, (b) surstylus; (28) M. minuscula (Albuquerque, 1955) . Scale: 0,1 mm. Thorax. Intra-alar setae 1+2. Postpronotal lobe with 2–3 setae. Anepisternum with 6 setae. Katepisternal setae 1+2, with a setulose area. Legs. Mid femur on AD surface with row of long and spaced setae up to basal half and 1 preapical seta, V surface with row of long and spaced setae at base; tibia on D surface with 1 preapical seta, PD surface without strong setae. Hind femur swollen, D surface with 2 preapical setae, PV surface with a series of misaligned and curved setae at apex on apical third, with 2 apical setae larger than the others; tibia on A with 1 apical seta, V surface with 1 apical seta, PV surface with 1 apical seta. Abdomen. Fifth sternite prominent on anterior margin, concave on posterior margin with extensions forming an acute angle ( Fig. 23 ). Terminalia. Cercal plate rounded externally on posterior margin, median notch deep, anterior margin with pointed extensions forming a 75-degree angle ( Fig. 31 ). Surstyli with notch and curved towards center of cercal plate ( Fig. 31 ). Phallus long and straight, rounded at apex, pregonite with sickle-shaped base, distiphallus with denticles on membrane ( Fig. 39 ). FIGURES 29–32. Cercal plate, epandrium, and surstylus, dorsal view. (29) Micropotamia stellaria sp. nov . ; (30) M. ananas sp. nov . ; (31) M. ditissima sp. nov . ; (32) M. fortuna sp. nov . Scale: 0.1 mm. Material examined. Holotype ♂ . BRASIL . Amazonas : Rio Nhamundá , Ig. Areias. [ -1.351100 , -57.373200 ], 25m . 17–20. v.2008 . J. A. Rafael e equipe, Malaise ( INPA ). Paratypes . BRASIL . Amazonas : 8 ♂♂ , “ Rio Nhamundá , Ig. Areias.[ -1.351100 , -57.373200 ], 25m . 17–20.v.2008 . J. A. Rafael e equipe, Malaise ( INPA )” ; 4 ♂♂ , “ Borba , Rio Abacaxis. [-5.150900, -58415200]. 26–28. v.2008 . J. A. Rafael e equipe, Malaise. ( INPA )” ; 1 ♂ , “idem”. (DZUP-563063–563066) ; 2 ♂♂ , “ Rio Nhamundá , Cuipiranga. [-5.150900, -58415200], 22m . 20–23. v.2008 . J. A. Rafael e equipe, Malaise ( INPA )” ; 1 ♂ , “idem”. ( DZUP ) ; 2 ♂♂ , “ Borba , Rio Abacaxis , Paxiúba. [ -4.284800 , -58.342400 ]. 02–04.vi.2008 . J. A. Rafael e equipe, Malaise. (DZUP-563067,563068)” ; 1 ♂ , Maué , Rio Abacaxis , Flona Pan Rosa. [ -5.150900 , -58.415200 ]0515’09’’S-5841’52’’W. 27–29. v.2008 . J.A. Rafael e equipe, Malaise. ( INPA ) ; 1 ♂ , Barcelos , Rio Aracá , Comum. Bacuquara. [ -9.1700 , 63.103500 ]. 12–14.vi.2010 . R . Machado, J. A . Rafael , R . Cavichioli, D . Takiya & P. Dias. Malaise ( INPA ) ; 1 ♂ , Pq. N. Jau , Rio Carabinani , Boa Vista. [ -2.10500 , -61.321900 ]. 29–31.vii.1995 . Malaise. J. A. Rafael & J. Vidal. ( INPA ) ; 1 ♂ , RFA Ducke. 16–20.xi.2010 . Coleta manual. Cordeiro, Grisales, Guedes & Haseyama col. (DZUP-563069); 1 ♂ , Rio Nhamundá , [ -1.351100 , 57.373000 ], 25m . 17–20. v.2008 . J. A. Rafael e equipe. Malaise. (DZUP-563070). FIGURES 33–36. Phallus: phallapodeme, pregonite, postgonite, distiphallus and denticles on membrane, lateral view. (33) Micropotamia amazonica ( Albuquerque & Lopes, 1982 ) ; (34) M. cilitibia (Albuquerque, 1955) ; (35) M. fuscisquama (Wulp, 1896) ; (36) M. minuscula (Albuquerque, 1955) . Scale: 0,1 mm. Etymology. The specific epithet ditissima refers to the abundance of setae in the swelling of the apical third of the femur (from Latin: ditissima = abundant).