Janzena Troubridge

Troubridge, J. T., 2020, A new genus and 37 new noctuoid species from peninsular Florida and the Keys (Lepidoptera: Noctuoidea), Insecta Mundi 2020 (789), pp. 1-56 : 7-8

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https://doi.org/ 10.5281/zenodo.4585782

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Janzena Troubridge

gen. nov.

Janzena Troubridge View in CoL , gen. n.

Type species. Janzena pyraliformis Troubridge View in CoL

Diagnosis. Externally, Janzena is characterized by the scales beneath the prothoracic collar that are greatly elongated medially and held vertically to resemble a crest ( Fig. 12b View Figures 1–12 ). The forewing is brown with zig-zag pattern of scattered white scales. The male is characterized by the narrow apical spine and tiny subapical clasper on the valve, the cross-shaped juxta, and the enormous spine on the apex of the vesica. In the female genitalia, the corpus bursae is divided into a leathery, tubular posterior section and membranous, globular anterior section.

Description. Head. Antenna filiform, ciliate; eye unlashed, smooth, round, without surface hair. Thorax. Clothed with spatulate scales, scales posterior to prothoracic collar greatly elongated and held vertically to form a crest. Abdomen. Coremata with brushes, levers, and pockets absent from base of abdomen. Male genitalia ( Fig. 66 View Figures 61–66 ). Valve long and narrow, the distal ¾ membranous, rounded apically with a narrow apical spine; sacculus encircles basal ¼ of valve; clasper fused to valve and runs along ventral margin from sacculus almost to apex of valve, at which point it leaves the surface of valve to form a tiny spine; uncus narrow basally, becoming wider toward apex, producing an elongate, globular structure; juxta in the form of a cross, lateral arms meet valves and very narrow anterior arm extends toward saccus; vesica short and tubular with very long apical spine ca. 1.3× the length of the vesica. Female genitalia ( Fig. 109 View Figures 105–113 ). Ovipositor lobes short and non-telescopic; ostium bursae with ventral sclerite that gradually narrows medially on distal margin; ductus bursae relatively short, membranous; small appendix bursae arises near ductus bursae; corpus bursae in two parts, the elongate, tubular, posterior section leathery and lightly sclerotized on the dorsal surface and the anterior globular, membranous section arises laterally from anterior end of tubular posterior section.

Etymology. Gender feminine. This genus is named to honor Dr. Daniel H. Janzen and his work with Neotropical Lepidoptera .

Discussion. The nuclear DNA was studied at the CNC, where it was determined that the genus Janzena forms a basal lineage to the remainder of the Rivulinae (Reza Zahiri, pers. comm.). Species have been collected in the Florida Keys, Puerto Rico, and Costa Rica (where a second undescribed species occurs). In Costa Rica, larvae are frequently collected on senna ( Cassia sp.; D. H. Janzen, pers. comm.), which are common plants in southern Florida.











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