Pyralis farinalis (Linnaeus, 1758)

Özyolci, Büşra & Çalişkan, Selma Seven, 2024, Morphological comparison of tympanal organs between Phycitinae and Pyralinae (Lepidoptera: Pyralidae), Zootaxa 5463 (1), pp. 127-136 : 129-130

Pyralis farinalis (Linnaeus, 1758)

Image ( Fig. 2a ): The larvae feed on stored grain and live. The wingspan of the adults is 23mm. There are reddish-brown zigzag bands at the tip and end of the forewings of this reddish-brown moth. The medial area is light brown or yellowish while the costal and post-median areas are brownish-red in colour. They are separated from each other by a white band. The outer antemedial white stripe is curved. Fore and rear wings have fringes.

Tympanal organ ( Figs. 3a , 4a ): Bulla tympani is closed, round, and the inner edge is usually concave on the front. The praecinctorium, is undeveloped. The tympanum and conjunktivum are on the same plane. The pons tympani is thin and shaped like a needle, and it is usually elongated beyond the back edge of the first tergite. The fornix tympani is thick and elongated in the shape of a triangle downwards. The processus spiniforme is curved and at the head of bulla tympani. The intersegmental thoraco abdominal membrane is U-shaped.

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.