Stemmatophora robustus (Asselbergs, 2010) Alipanah & Asselbergs, 2018

Alipanah, Helen & Asselbergs, Jan, 2018, Acteniopsis gambronensis sp. n. (Pyralidae: Pyralinae), a new species from Iran, with a revision of the genus Acteniopsis Amsel, 1959, Nota Lepidopterologica 41 (1), pp. 87-97 : 87-88

Stemmatophora robustus (Asselbergs, 2010) comb. n.

Acteniopsis robustus Asselbergs, 2010: 554-555, pl. 1, figs 1-3.

Material examined.

Holotype 1 ♂, United Arab Emirates, Wadi Maidaq , 460 m, 12.IV.2006, leg. C. Gielis, GP. 5787 Asb, in Naturalis Biodiversity Center, Leiden ; Paratypes, 1 ♂, United Arab Emirates, 10 km. NE. Huwaylat , 18.IV.2006, leg. J. Buszko, GP 6234 Asb , 1 ♂ same data in Naturalis Biodiversity Center, Leiden . Holotype and Paratypes were examined by the second author.

Diagnosis. Acteniopsis robustus was described by Asselbergs (2010) based on three male specimens. Examination of the types of A. robustus revealed that this species is almost similar to A. kurdistanella and the newly described species superficially; however, shares a variety of characters with other members of the genus Stemmatophora including: (1) very long maxillary palpi (more than three-fifth of the length of labial palpi and half times the horizontal diameter of compound eye in Paratypes) compared with very small and hardly recognizable maxillary palpi in A. kurdistanella and A. gambronensis ; (2) long and relatively slender labial palpi in contrast to shorter and broadly scaled labial palpi of A. kurdistanella and A. gambronensis ; (3) ciliae at the ventral surface antennae, consist of two pairs of plumose ciliae on each flagellum in A. robustus , while in A. kurdistanella and A. gambronensis they form a transverse row of at least ten ciliae (Fig. 4C ).

There are some other differences between the male genitalia of A. robustus , A. kurdistanella and A. gambronensis :

1) Slender, rod-shaped cornutus of A. robustus (Fig. 2F ) compared with the stouter and anchor-shaped cornuti of A. kurdistanella and A. gambronensis (Figs 2D, E ).

2) In both A. kurdistanella and A. gambronensis the vinculum is basally pointed (Figs 2A, B ), while in A. robustus it is basally rounded.

3) In A. kurdistanellus and A. gambronensis the gnathos does not exceed the uncus (Fig. 2A ) or slightly exceeds it (Fig. 2B ), whereas in A. robustus it exceeds clearly.

4) The valva in A. robustus is slightly curved posteriorly, whereas in A. kurdistanella and A. gambronensis it is straight (Figs 2A, B ).

It should be noted that Acteniopsis robustus has the largest wingspan (22-24 mm) compared with A. kurdistanella (17-18 mm) and A. gambronensis (13.7-17.0 mm).

In view of the above, we hereby transfer the species A. robustus from Acteniopsis Amsel, 1959 to Stemmatophora Guenée,1854.

Figures

Figure 2. Male genitalia in A. gambronensis sp. n. (A, D) and A. kurdistanella Amsel (B, C, E), and phallus in S. robustus (F). A, B) main armature and phallus, C) distal part of uncus and gnathos in lateral view, D, E) distal part of phallus in lateral view, showing cornutus.

Figure 4. Wings venation (A, B) in A. kurdistanella (A) and S. brunnealis (B), and stylized drawings of ventral ciliae of the antennae (C-E) in A. gambronensis sp. n. (C) and S. brunnealis (D, E). C, D) in ventral view, E) in lateral view, showing ciliae of the left part.