Curtonotum bathmedum Hendel

Klymko, John & Marshall, Stephen A., 2011, Systematics of New World Curtonotum Macquart (Diptera: Curtonotidae) 3079, Zootaxa 3079 (1), pp. 1-110 : 43-44

Curtonotum bathmedum Hendel

Figures 51–57 , and 208

Curtonotum bathmedum Hendel, 1913: 628 .— Wirth, 1975: 78.1 [Neotropical catalogue].

Curtonotum bathymedum , error; Malloch, 1930: 325.

Diagnosis. Characters to distinguish C. bathmedum from C. bivittatum are provided under the diagnosis of the latter species.

Description. Similar to C. bivittatum , except as follows. Length: 5.8–9.0 mm. Frons width 1.0–1.2 times frons height. Eye height 6.4–7.1 times gena height. Setulae on pedicel black dorsally and dark orange ventrally. Proximal limit of infuscation along posterior margin on R 4+5 at between 0.10–0.26 times the distance from dm-cu to r-m, thus the infuscation along M 1, dm-cu, and CuA 1 often forming a zig-zag.

Male terminalia: Sternite 5 truncate posteriorly, with small invaginate area of weak sclerotization, this invagination free of setulae. Tergite 6 well sclerotized, often with 1 or 2 setulae; tergite 7 moderately long, dorsally ca. 0.4 times as long as dorsal epandrial length. Sternites 6 and 7 weakly sclerotized, folded over, but not interrupted at protandrial fold; sternite 6 broad, more heavily sclerotized ventrally on left; sternite 7 relatively long, length of right portion ca. 0.5 times length of right portion of sternite 6. Epandrium relatively large, setulose (in no one area these particularly long), fused below cerci, area of fusion with distinct bulge in lateral profile; surstylus laterally articulating with and medially fused to epandrium, narrow, hind margin concave, mediodistal corner acute, setulose above and below. Cercus stout, ventral margin flat, broadly rounded posteriorly, longest cercal setulae longer than longest epandrial setulae. Hypandrium with low, broad-based, rounded basodorsal projection, posterior bridge produced ventrally and posteriorly, hypandrial arm straight in lateral profile, fused distally to opposite hypandrial arm, with 2 posteroventrally oriented small setulae inserted on small ventral projection just posterior of epandrial posterior margin, postgonite a small, bare ventrally oriented nub not projecting beyond surstylus. Phallapodeme with large, slightly posteriorly projecting “fan”, margin opposite fan blade concave; basiphallus broadly expanded and well sclerotized basally, gradually tapering; distiphallus base short, apically narrowing, with small broad flat projection distally on right, apex with 2 small sclerotized projections on right, otherwise broad, densely covered in spines on membranous dorsal surface, ventral surface smooth, sclerotized medially. Ejaculatory apodeme within base of basiphallus, elongate, slightly expanded and with small pores basally.

Female terminalia: Similar to C. bivittatum , except as follows. Sternite 5 length 2.8–3.1 times width, sternite 6 length 0.8–0.9 times width. Sternite 10 roughly pentagonal (as in Figure 47 ) or tapering and rounded posteriorly ( Figure 54 ), posterior margin bending slightly dorsally, median and proximal margin with slightly heavier sclerotization. Ventral receptacle with hemispherical head.

Type material. Hendel’s (1913) type series included eight syntypes from Peru. Hendel made no indication of a holotype in his publication. Two female syntypes from this type series were examined. One of these was labeled as typus by Hendel, and is here designated lectotype, while the other, labeled cotypus by Hendel, is here designated paralectotype. A lectotype has been designated to avoid any confusion surrounding the definition of C. bathmedum should the original type series prove to be made up of more than one species .

Lectotype here designated: ♀: PERU. Huánuco: “Pachitea Münd.”, 150 m, 4.xi.1903 ( SMTD) . Paralectotype: ♀: PERU. Ucayali: “Ucayalifl” [Ucayali River], Unini , 19.x.1903 ( SMTD) .

Other material examined. BOLIVIA: Beni: ♀, Rurrenabaque, Rio Beni , x, W.M. Mann, Mulford Biological Exploration 1921–1922 ( USNM) ; ♂, ♀, Palos Blancos, Alto Beni , 600 m, 11–15.i.1976, L.E. Pena ( CNCI) ; ♀, Las Juntas , x.1913, Steinbach ( CMNH) . La Paz: 2♂, Heath River Wildlife Centre, ~ 21 km SSW Puerto Heath, 12˚40’S, 68˚42’W, 29.iv–12.v.2007, S.M. Paiero ( DEBU) . PERU. Cuzco: ♂, 2♀, Quincemil , 13–31.viii.1962, L. Pena ( CNCI) . Huánuco: ♀, Pachitea-Münd. , 150 m, 24.xi.1903 ( SMTD) . Madre de Dios: 1 (sex indeterminable due to Psocoptera damage), iii.1903, O. Garlepp ( SMTD) ; ♂, ♀, Avispas , 400 m, 20–30.ix.1962 , ♀, 1–15.x.1962, all L. Pena (all CNCI) ; 3♂, 3♀, Manu, Rio Manu, Pakitza , 250 m, 12˚7’S, 70˚58’W, 9–23.ix.1988, A. Freidberg ( USNM) . Ucayali: 1 sex unknown (Psocoptera damage), Urubambafl [Urubamba River], Umahuankilia , 19.ix.1903 ( SMTD) ; ♀, Meshagua, Urubambafl , 3.x.1903 , ♀, 7.x.1903, ♀, 13.x.1903 (all SMTD) ; ♂, Middle Rio Ucayali , 6.xi.1923 (F6174) ( AMNH) .

Figures

FIGURES 51–57. Curtonotum bathmedum Hendel. 51. Male terminalia, left lateral. 52. Male terminalia, posterior. 53. Distiphallus, dorsal. 54. Female sternite 8, ventral. 55. Female sternite 10, ventral. 56. Spermatheca. 57. Ventral receptacle.

FIGURES 46–50. Curtonotum bivittatum Klymko & Marshall, sp. n. 46. Ovipositor, left lateral. 47. Female sternite 10, ventral. 48. Female sternite 8, ventral. 49. Spermatheca. 50. Ventral receptacle.