Oncocera semirubella (Scopoli, 1763)

Özyolci, Büşra & Çalişkan, Selma Seven, 2024, Morphological comparison of tympanal organs between Phycitinae and Pyralinae (Lepidoptera: Pyralidae), Zootaxa 5463 (1), pp. 127-136 : 131

Oncocera semirubella (Scopoli, 1763)

Image ( Fig. 2f ): The larvae, sometimes gregariously, live in a dense web. Wingspan of adults is 21mm. The antennae are filiform. The forewings are pinky-red and yellow while the rear wings are light brownish. The costal edge is usually brownish or whitish in color.

Tympanal organ ( Figs. 3f , 4f ): Bulla tympani which resembles a pouch is closed and concave. Tympanum and conjunktivum are on the same plane and the paraspinal line separating them has a thorny structure. There is a consecutive thorny rugae odontinae structure between the tympanum and fornix tympani. Fornix tympani is thin. Pons tympani is shaped like two attached noodles. The tergo-sternal sclerite is long and curvy, and the processus spiniforme is also curved. Zona glabra tympani is on a wide area.

Figures

FIGURE 2. Top views of pyralid images. a. Pyralis farinalis b. Hypsopygia glaucinalis c. Endotrichia flammealis d. Dioryctria pineae e. D. mendacella f. Oncocera semirubella g. Etiella zinckenella h. Acrobasis obliqua i. Myelois circumvoluta j. Ematheudes punctellus.

FIGURE 3. Ventral view of the tympanal organs of moths before preparation (con: conjunctivum, ft: fornix tympany, prs: processus spiniforme, rgo: rugae odontinae, spn: spinula, tym: tympanum, tymc.: tympanalcilia, zgt: zona glabra tympani) a. Pyralis farinalis b. Hypsopygia glaucinalis c. Endotricha flammealis d. Dioryctria pineae e. Dioryctria mendacella f. Oncocera semirubella g. Etiella zinckenella h. Acrobasis obliqua i. Myelois circumvoluta j. Ematheudes punctellus.

FIGURE 4. Tympanal organs ultrastrukture of the moths after preparation (Blue circle: Intersegmental thoraco abdominal membrane; black circle: pons tympani; black triangle: processus spiniforme; red line: fornix tympani width) a. Pyralis farinalis b. Hypsopygia glaucinalis c. Endotricha flammealis d. Dioryctria pineae e. Dioryctria mendacella f. Oncocera semirubella g. Etiella zinckenella h. Acrobasis obliqua i. Myelois circumvoluta j. Ematheudes punctellus.