Leptidea duponcheli (Staudinger, 1871)

Llorente-Bousquets, Jorge & Castro-Gerardino, Diana Jimena, 2018, Antennal ultrastructure of Leptidea Billberg, 1820 (Pieridae: Dismorphiinae: Leptideini) and its taxonomic implications, Zootaxa 4402 (3), pp. 401-442 : 411

Leptidea duponcheli (Staudinger, 1871)

ANTENNAL CLUB ( Figs. 3 , 4a, b ). The scaleless club is 602 µm long in the male and 658 µm in the female.

ANTENNOMERES ( Figs. 3 , 4 a–d). There are usually 5 or 6 scaleless antennomeres; in the female, the presence of three central sulci (the last reduced in size) in the distal antennomere indicates the possibility that the distal three antennomeres are fused. The maximum ratio between length (l) and width (w) is 1:5. The dorsal surface of the antennomere is scaled, rather than the ventral.

SULCI AND PSEUDOSULCI ( Fig. 4 a–e). There are 4–5 central (c) and 7–8 lateral (l), although it is not clear because the sulci are disaggregated. In all cases, the basal antennomeres lack sulci or pseudosulci. They are usually irregular, and in females are more disaggregated and small. In the male, the central sulci in the medial antennomeres occupy the entire length of the antennomere and form a continuous groove. The sides extend toward the dorsal surface from the third antennomere. The pseudosulci are numerous, especially in females ( Fig. 4b ).

MICROTRICHIA ( Fig. 4 f–h). Microtrichia m1, m2, and m4 are present. In the basal antennomere, the m2 are flatter and larger, have fewer striations, and are more separated from each other. The trichoid sensilla and microtrichia ratio (st:m1) in the central sulci is 1:3 to 1:3.6.

TRICHOID SENSILLA ( Fig. 4f ). The average length is 16.4 µm. The number of sensilla in the central sulci is 12 to 25 for a total of 101 in the male and 115 in the female.

CHAETIC SENSILLA ( Fig. 4g ). The average length is 17.5 µm; they are as long as the trichoid, and do not exceed 20 µm in length; the are shorter in females. On the ventral surface, there are up to six chaetic sensilla located in the middle of the antennomere, near the sulci or pseudosulci; on the dorsal surface there are two to four, for a total of six to ten per antennomere.

BASICONIC SENSILLA. The basiconic sensilla are not very abundant relative to the auriculate sensilla, but they are more frequent in the distal antennomeres on the ventral surface.

AURICULATE SENSILLA ( Fig. 4h ). Theses sensilla are a little more abundant than the basiconic ones; they are present on the ventral and dorsal surfaces.

COELOCONIC SENSILLA ( Fig. 4i, j ). Coeloconic sensilla sc1 and sc2 are located on the dorsal surface of the antennal club, especially in the most distal antennomere; sc2 are very rare, only two.

OTHER SENSILLA ( Fig. 4k, l ). A single styloconic sensillum without stylus is located at the apex of the distal antennomere. In the most distal antennomere, as well as in the basal, we found two campaniform sensilla.

Figures

FIGURE 3. Photographic composition of the male antenna of Leptidea duponcheli (x150). The arrow indicates the scaleless area on the antennal club.

FIGURE 4 (a–f). Antennal club of Leptidea duponcheli. a. Antennal club ♂ (x150). b. Antennal club ♀ (x110). c. Distal antennomere that is equal to three (?) fused (arrow) ♂ (x300). d. Same as c but in ♀ (x300). e. Central sulcus ♂ (x1.00 k). f. Trichoid sensilla ♂ (arrow), surrounded by microtrichia m1 (m) (x5.00 k).