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Apophatus bifibratus

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Apophatus bifibratus

ADULT (Figures 437, 438).—Length of forewing: , 5–5.2 mm; , 5.3–5.5 mm. A small moth with dark fuscous to light brown forewings reflecting a slight purplish to golden luster, variably marked with streaks and small patches of pale cream to white scales. The eyes and mouthparts are generally reduced.

Head: Vestiture of vertex light yellowish brown; frons pale white to cream. Antennae approximately 0.9 the length of forewing, 50–52-segmented; scape brownish fuscous to light brown dorsally, whitish buff ventrally; pecten consisting of a few dark hairs; flagellum uniformly light brown to brownish fuscous, with a slight golden luster. Maxillary palpi dull white. Labial palpi white dorsally, lightly suffused with buff ventrally; apex of second segment with a few dark hairs.

Thorax: Pronotum dark fuscous to light brown. Venter whitish buff. Forewings dark fuscous to light brown with a slight purplish to golden hue; pattern variable, complex, sometimes with an almost equal amount of cream to white scaling as streaks or patches over wing; costal margin with 3–7 small cream white patches or strigulae; termen fuscous equally mixed with buff and white scales. Hind wings uniformly dark to light gray; male without androconial folds or pockets. Forelegs fuscous to brown dorsally, whitish buff ventrally; tarsi not annulated. Midlegs similar to forelegs except paler, more gray dorsally. Hind legs similar to above except pale brown dorsally.

Abdomen: Dark fuscous to light golden brown dorsally, pale gray to buff ventrally.

Male Genitalia: As shown in Figures 552–556. Uncus slightly bilobed. Gnathos a median, elongate lobe, sometimes extending beyond uncus. Valvae rounded, without apical lobe but with a strongly curved subapical pollex. Aedoeagus elongate, with a pair of long filamentous appendages arising near middle immediately anterior of junction of ejaculatory duct; appendages sharply curved posteriorly at their bases; anterior half of aedeagus deeply furcate; posterior half membranous and swollen.

Female Genitalia: As shown in Figure 599. Corpus bursae relatively long, slightly exceeding length of ductus bursae; signa and spicules absent. Ductus bursae slender, with relatively few spicules. Spermatheca equalling length of bursa copulatrix.

IMMATURE STAGES.—Unknown.

HOLOTYPE.—. Puntra, 50 m, approximately 30 air km S of Ancud, Chiloé Island, Chiloé Province, Chile; 21–22 Dec 1981, D.R. Davis, type no. 101183 (USNM).

PARATYPES.—ARGENTINA. Rio Negro Prov.: Lago Frias, Puerto Frias, 780 m, 1, 1, 7 Dec 1981, Nielsen & Karsholt.

CHILE. Same data as holotype, 1.

Paratypes in USNM and ZMUC.

HOST.—Unknown.

FLIGHT PERIOD.—7 to 22 December; univoltine.

DISTRIBUTION (Map 15).—This species has been found at only two somewhat disjunct localities in the temperate Valdivian forests of southern Argentina and Chile. The locality in Argentina is in the western montane portion of Rio Negro Province. The Chilean type-locality is situated in a lowland wooded ravine approximately 300 yards east of the Pan American Highway on Chiloé Island.

ETYMOLOGY.—The specific name is derived from the latin bi (two, double) plus fibra (filament), in reference to the two filamentous appendages arising from the aedoeagus.
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bibliographic citation
Davis, Donald R. 1986. "A New Family of Monotrysian Moths from Austral South America (Lepidoptera: Palaephatidae), with a Phylogenetic Review of the Monotrysia." Smithsonian Contributions to Zoology. 1-202. https://doi.org/10.5479/si.00810282.434