Curtonotum tumidum Enderlein

Klymko, John & Marshall, Stephen A., 2011, Systematics of New World Curtonotum Macquart (Diptera: Curtonotidae) 3079, Zootaxa 3079 (1), pp. 1-110 : 80-83

Curtonotum tumidum Enderlein

Figures 138–147 , and 215

Curtonotum tumidum Enderlein, 1917: 68 .— Wirth, 1975: 78.3 [Neotropical catalogue].

Diagnosis. Characters that distinguish this species from C. flavisetum and C. taeniatum are discussed under the diagnoses of those species.

Description. Similar to C. flavisetum except as follows. Length: 9.0–10.0 mm. Frons width 1.3–1.4 times frons height. Eye height 10.3–13.0 times gena height. Vibrissa much larger than adjacent subvibrissals, vibrissa and subvibrissals usually black, though vibrissa and several subvibrissals often orange-yellow. Scutum often with pair of lateral vittae extending from posterior of transverse suture to posterior margin. Postpronotal lobe often with additional moderately long seta anterior to 3 prominent setae. Anepisternum with 3 large and 2–5 moderate setae on posterior half. Prominent seta at posteroventral corner of katepisternum, and usually 1–2 adjacent setae, black. Mid coxa usually with at least 3 dark setae medially, though several specimens with only 1 or 2. Setulae on anterior face of fore femur dorsal of ctenidial comb usually black, though in several specimens these pale, several pale setulae present proximal to ctenidial comb.

Wing: Alula very narrow. Non-infuscated areas of wing with yellow to yellow-brown tinge, this quite strong in costal cell, r 1 and r 2+3. r 1 light to dark brown infuscate on anterior third to two-thirds from just distal of R 1 apex to wing apex, wing apex with broad dark brown infuscate area; r 2+3 with broad dark brown infuscate area subapically, narrow band of non-infuscation running through area of infuscation on posterior half, infuscate area posterior to this medium brown; r 3+4 medium brown at apex along anterior and posterior margin, m 1 similarly medium brown infuscate along anterior margin, membrane around dm-cu broadly grey-brown infuscate.

Male terminalia: Sternite 5 narrow, with sparse yellow setulae, posterior margin truncate and well sclerotized; tergite 6 well sclerotized, setulose medially, tergite 7 relatively long, dorsal length ca. 0.5 times epandrial dorsal length; sternite 6 and 7 separated into right and left portions, sternite 6 moderately long, left portion moderately sclerotized, more heavily sclerotized along proximal margin, right portion weakly sclerotized; right portion of sternite 7 relatively long, subequal in length to right portion of sternite 6, with narrow connection on right to right ventral margin of tergite 7 (this connection posterior to right spiracle 7). Epandrium relatively small, with scattered setulae, 1 or 2 in posteroventral corner very long and thick, and moderately long, bare (free of microtrichia and setulae) posteroventral extensions, these fused medially posterior to cerci, posterior edge of sclerotization ending at distinct rough patch proximal to surstyli; surstylus separated from epandrium by sclerotized rough patch, ventral face and margins setulose, slightly concave directly opposite of postgonite ventrally, in lateral profile ventral margin flat, with slight dorsal bend on distal half, sharp dorsal bend distally, dorsal margin concave, in posterior profile lateral margin broadly rounded, tightly rounded apically, posteroventral margin concave on distal half, medial margin slightly concave. Cercus slightly elongate, ventral margin flat, dorsal margin broadly rounded. Hypandrium with low, slightly angular dorsobasal lobe, posterior bridge projecting slightly ventrally and posteriorly, hypandrial arm bending less than 90˚ at hind margin of epandrium, with 2 ventrolaterally oriented setulae distal to bend and anteriorly oriented process on medial margin distally, not fused to opposite hypandrial arm apically; postogonite setulose dorsally, with 1 apical and 1 subapical dorsal projection. Phallapodeme with large “fan”, margin opposite fan convex basally, concave distally, basiphallus weakly sclerotized basally, elongate; distiphallus base short and stout, tapering slightly apically, apex bilobed, lobe bases stacked dorsoventrally, ventral lobe slightly longer, ventral lobe extending slightly to left, well sclerotized on dorsal margin, with moderately sclerotized, antrorse process ventrally at base, lobe otherwise membranous, with fine antrorse spinules on left, and broad-based, antrorse stout spinules on right, apex pointed, dorsal lobe well sclerotized dorsally and on left, area of sclerotization with dense, fine, short erect spinules, otherwise membranous and smooth, apex rounded. Ejaculatory apodeme outside of basiphallus, expanded and with small pores basally.

Female terminalia: Similar to C. flavisetum except as follows. Sternite 5 length 2.9–3.1 times width, sternite 6 length 1.3–1.6 times width. Sternite 8 ca. 3.3–4.0 times longer than wide. Spermatheca papillose, papillae varying from minute broad-based spines to larger broad tipped bumps. Ventral receptacle neck squat, bent at base of donutshaped apex, duct with fine longitudinal wrinkles.

Type material. Enderlein (1917) listed five type specimens of C. tumidum , two females deposited at the Stettiner Zoologischen Museum, and two male and one female specimens deposited at the Hungarian National Museum. Enderlein made no indication of a holotype . L. Papp ( HNHM) confirmed that the specimens at Budapest are still present, and that one male specimen is labeled “Type” and one male and one female specimen are labeled “ Syntypus ”. The male specimen labeled “Type” is here designated the lectotype ; the two specimens labeled “ Syntypus ” are thus paralectotypes. A lectotype has been designated to avoid any confusion surrounding the definition of C. tumidum should the original type series prove to be made of more than one species.

Lectotype here designated: ♂: SURINAME. “Surinam Michaelis” ( HNHM). We have seen only photos provided by G. Lengyel ( HNHM) . Paralectotypes: ♂, ♀: SURINAME. “Amer. mer., Surinam” ( HNHM) .

Other material examined. Unknown country: ♂, “S. America” ( ZMUC). BRAZIL. Amazonas: 2♂, ♀, Maues, Worontzow, ii.1937 ( MZSP) ; 2♂, ♀, Manacapuru, x.1936 ( MZSP) . Mato Grosso: ♂, Utiariti, Rio Papagio, Mt , x.1966, ♂, xi.1966, all Lenko and Pereira (all MZSP) . Pará: ♂, ( BMNH) . Rondônia: ♂, 2♀, 62 km SE Ariquemes , 17–24.iii.1989, ♀, 8–20.xi.1994, ♀, 7–18.xi.1995, all W.J. Hanson (all UTAH) . São Paulo: ♂, Serra da Neblina, Rio Tucano , 230 m, AM, 4.xii.1965, E. Dente ( MZSP) . COLOMBIA. Meta: ♂, ♀, Rio Guayuriba , selva, xii.1946, L. Richter ( AMNH) . PERU. Amazonas: ♂, Rio Santiago , 27.ix.1924, ♀, 20.xi.1924 (all AMNH) . Huánuco: ♂, Over Monzon R., 850 m, 10.vi.1964, J. Schunke ( BMNH) . Loreto: ♂, Pebas ( ZMUC) ; 3♂, Iquitos , 1923, ♂, 6.iii.1924, ♂, 15.iii.1924 ( AMNH) ; ♂, 15 km W Iquitos , 16.ii.1984 ( USNM) . ECUADOR. Zamora- Chinchipe: ♂, ♀, Jumboe R., 1200 m, 1–2.iv.1965, L. Pena ( CNCI) . Napo: ♂, Puerto Misahualli , 14.vii.1978, G.J. Umphrey ( DEBU) , ♂, 350 m, ii.1983, M. Sharkey ( CNCI) . Pastaza: ♂, Mera (2 km E), 20.v.1977, P.J. Spangler & D.R. Givens ( USNM) . GUYANA. Barima-Waini: ♂, Canister Falls, Cattle Trail Survey , vi.1920, A.A. Abraham ( BMNH) . Cuyuni-Mazaruni: 2♂, Bartica, Bartica District ( AMNH) ; ♂, Kartabo, Bartica Dist. , 21.v.1924 ( AMNH) , ♂, 1921 ( CASC) , same data plus ♂, Tropical Research Station , New York Zoological Society, no. 20935, 1920 ( AMNH) , same data except ♂, no. 20469 ( AMNH) ; ♂, Kartabo, Bartica Dist. , “Peruuni Trail”, 23.vi.1922 ( CASC) . Mazaruni-Potaro: ♀, Waratuk Falls, Potaro River , 1º rainforest, 300’, 1.x.1990, ROM 905028, L.D. Coote ( ROME) . Potaro-Siparuni: 7♂, ♀, Kaieteur Falls , 5˚10.5’N, 59˚28.9’W, 21–24.viii.1997, W.N. Mathis ( USNM) ; ♂, Kaieteur , 25.vii.1911, ♂, ♀, 14.viii.1911 ( AMNH) ; ♂, Kaieteur , high forest, 13.viii.1937, ♂, 16.viii.1937, 3♂, 3.ix.1937, 2♂, ♀, 7.ix.1937, 2♂, savannah, 5.ix.1937, all Richards & Smith (all BMNH) . Upper Takutu-Upper Essequibo: ♀, Rupini Dist., Kurupukari , E side Essequibo R., 1˚ rainforest, 200’, 6–16.x.1990, ROM 905036, L.D. Coote ( ROME) . SURINAME. Sipaliwini: ♂, Raleigh Vallen-Voltzberg Res., Voltzberg Camp , 90 m, 29.i–13.ii.1982, J. Carpenter & D. Trail ( USNM) .

Figures

FIGURES 138–142. Curtonotum tumidum Enderlein. 138. Male terminalia, left lateral. 139. Male terminalia, posterior. 140. Distiphallus, dorsal. 141. Male sternite 5, ventral. 142. Fore femur, anterior.

FIGURES 143–147. Curtonotum tumidum Enderlein. 143. Female sternite 8, ventral. 144. Female sternite 10, ventral. 145. Spermatheca. 146. Ventral receptacle. 147. Lower thorax, left lateral.