Neoaspilota isochela

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Neoaspilota (Neorellia) isochela

DESCRIPTION.—Resembling N. punctistigma but differing as follows: wing length 2.63 to 3.60 mm.

Head (Figure 121): Frontal-head ratio 0.55–0.58; frontal ratio 0.77–0.97; 1st flagellomere ratio 1.46–1.73; aristal-antennal ratio 1.05–1.27; major setae brownish yellow, genal seta paler.

Thorax: Dorsocentral setae transversely aligned with or slightly anterior of anterior supra-alar setae: setae brownish yellow, anepimeral seta paler. Legs: Hindtibia lacking semierect setae preapically and posteroventrally; forefemur of male with sparse, long setae ventrally at basal half; hindfemur with moderately short setae ventrally; comb of hindtibia indistinct; 5th tarsomere of male foreleg including claws and pulvilli symmetrical (Figure 122); claws and pulvilli relatively large. Wing (Figure 197): Pterostigmal ratio 2.86–3.66; crossvein ratio 1.36–2.20; veins R4+5 and M almost straight; wing apex closer to end of vein M; wing milky hyaline, with yellowish pterostigma and veins; pterostigma sometimes with a brownish tinge at base.

Abdomen: Yellow, rarely with short, narrow blackish bands at anterior margin of terga 3–5; epandrium and cerci as in Figures 123, 124; epandrium with a posteroventral short and pointed projection; prensisetae short and broad; distiphallus (Figure 125) with rather long, double tube and well-developed “preaedeagal” flap. Female: Tergal ratio 0.86–1.10; tergal-oviscapal measure 4.5–5.2; oviscapal ratio 1.43–1.59; aculeus as in Figures 126, 127; spermatheca as in Figure 128.

TYPE MATERIAL.—The male holotype is labeled “Hunter No 1014/Bred Sideranth. rubignos. head/W4 3b. [handwritten]/MexiaTex[as] IX 29 1903 [29 Sep 1903]/Neaspilota alba Loew.” Allotype female is labeled with the same locality and host plant data as the holotype, but the date is “10 Oct 1905” and “On” is substituted for “Bred.” Other Paratypes are as follows: UNITED STATES. FLORIDA: Levy and Citrus Cos., Yankeetown, 31 Jul 1930, R.H. Beamer (2; KU). ILLINOIS: Morgan Co., Meredosia, 28 May 1917 (1; TAU). TEXAS: Brewster Co., Chicos Mountains, Basin, 6000 ft (1800 m) elevation, Big Bend National Park, 29–30 Apr 1959, J.F. McAlpine (1; CNC); Persimmon Gap, Big Bend National Park, 2 May 1959, L.J. Bottimer (1, 1; CNC). Caldwell Co., Luling, 2 mi (3.2 km) S, 11 Jun 1953, on corn (1; KU). Dallas Co., Dallas, 16 Jul–19 Sep 1905–1954, J.G. Chillcott, C.R. Jones (2; CNC, USNM). Donley Co., Clarendon, 31 Jul 1909 (emerged 4–14 Aug), ex. Chrysopsis sp., Safro (4, 5; USNM). Ellis Co., Ennis, 21 Sep 1905, on Sideranthus rubiginosus, (2, 1; USNM). Jeff Davis Co., Davis Mountains, 30 Apr 1954, L.D. Beamer (1; KU). Limestone Co., Mexia, 29 Sep 1903, ex. Sideranthus rubiginosus, Hunter (3, 4; BMNH, USNM). Terrell Co., Sanderson, 28–29 Apr 1959, J.F. McAlpine, W.R.M. Mason (2; CNC). Uvalde Co., Uvalde, 14 Apr 1952, Michener, Beamers, Wille, LaBerge (1; KU). Wichita Co., Electra, 9 mi (14.4 km) N, 27 Jun 1948, C. and P. Vaurie (1; AMNH).

UTAH: Cache Co., Logan Canyon, 26 Aug 1961, on Grindelia sp., G.F. Knowlton (1; KU). Davis Co., Farmington, 4 Sep 1934, G.F. Knowlton, C.F. Smith (1; AMNH). The holotype is double mounted (glued to a paper point), is in good condition, and is deposited in the National Museum of Natural Hisory, Smithsonian Institution.

OTHER SPECIMENS EXAMINED.—KANSAS: Seward Co., Liberal, 16 Aug 1945, R.H. Beamer (1; KU). NEBRASKA: Keith Co., Paxton, 6 mi (9.6 km) N, 5 Jul 1972, W.B. Stoltzfus (1; ISU). Although both of these specimens are probably determined correctly, we cannot be entirely sure, but for different reasons. The first specimen listed is in poor condition, especially its foretarsi, which are entangled in the mounting glue. Thus we cannot see this important character. The female has a tergal-oviscapal measure between this species and N. dolosa. Thus again, we are not entirely confident of its identity. Both specimens are also at the border of the known distribution of this species. For these reasons we have elected not to include them in the paratype series.

DISTRIBUTION (Figure 129).—United States, Florida westward through Texas to Utah, northward to Nebraska (?).

HOST PLANTS.—Chrysopsis sp., Grindelia sp. (needs confirmation), and Sideranthus rubiginosus.

ETYMOLOGY.—The specific epithet, isochela, is of Greek derivation and refers to the symmetrical claws of the male foretarsus.
bibliographic citation
Freidberg, Amnon and Mathis, Wayne Neilsen. 1986. "Studies of Terelliinae (Diptera: Tephritidae): A Revision of the Genus Neaspilota Osten Sacken." Smithsonian Contributions to Zoology. 1-75. https://doi.org/10.5479/si.00810282.439