Chilo luteellus (Motschulsky, 1866)

Léger, Théo, 2024, Half of the Diversity Undescribed: Integrative Taxonomy Reveals 32 New Species and a High Cryptic Diversity in the Scopariinae and Crambinae of the Philippines (Lepidoptera: Crambidae), Bulletin of the Society of Systematic Biologists 3 (2), pp. 1-93 : 50

Chilo luteellus (Motschulsky, 1866)

Figs. 36 , 97 , 155 .

Schoenobius luteellus Motschulsky, 1866: 199 . Type locality: Japan, Honshu, Kanagawa Pref., Kugenuma, Fujisawa

= Chilo concolorellus Christoph, 1885 , in Romanoff: 149, pl. 8 figs. 15a, b; type locality: Turkmenistan, Askhabad.

= Chilo gensanellus Leech, 1889: 108 , pl. 5 fig. 9; type locality: Korea, Gensan.

= Chilo dubia Bethune-Baker, 1894: 48 , pl. 1 figs. 18, 19; type locality: Egypt, Alexandria.

= Chilo boxanus Hering, 1903: 111 ; type locality: China, Yangtse.

= Chilo plumbosellus Chrétien, 1910: 366 ; type locality: Algeria, Biskra.

= Chilo molydellus Zerny in Osthelder, 1935: 79; type locality: Syria, Amanus, Juksek Dagh.

= Chilo pseudoplumbellus Caradja, 1932: 117 ; type locality: China, Tianjin.

= Chilo luteellus (Motschulsky) : Shibuya, 1928: 144.

MATERIAL

1 ♂, 2 ♀ (detailed information on Table S1; https://doi.org/ 10.5061/dryad.b8gtht7mh) .

SIMILAR SPECIES

Chilo pulverosellus Ragonot, 1895 .

DIAGNOSIS

Chilo luteellus ( Fig. 36 ) is a rather large species (♂: 10 mm, ♀: 13-14 mm) and has somewhat broader forewings than other large Chilo species. Unambiguous identification succeeds by examination of the genitalia. In male genitalia ( Fig. 97 ), the two elongate arms of the juxta and the absence of ventral arm on phallus separate this species and C. pulverosellus from other Chilo species. From C. pulverosellus , it is separated by the valva shape, which is more triangular than in C. pulverosellus , and the tips of the juxtal arms have a short tooth missing in C. pulverosellus (note that C. pulverosellus is not reported from the Philippines). In female genitalia ( Fig. 155 ), the following characters distinguish this species from congeneric species: ductus bursae with basal half sclerotized, distally indented, abutted by two sclerotized lobes at ductus midlength; distinct swelling at midlength; ductus distal half wrinkled, with punctuate membrane; corpus bursae with light sclerotized ring at corpus opening; signum lacking ( Anon 2019; Bleszynski, 1970c).

DISTRIBUTION

ALGERIA; CHINA; CROATIA; ISRAEL; ITALY; JAPAN; PHILIPPINES: Luzon (Laguna), Mindoro, Negros; ROMANIA; RUSSIA; SPAIN ( Bleszynski, 1970c; Koren, 2021; Poltavsky & Artokhin, 2015). Collected at an altitude of 150 m on the Philippines. Bleszynski (1970c) reports the species from North Africa and Central Asia. He investigated one female specimen from the USNM collected on Mount Makiling (Laguna).

DNA BARCODING

A maximum intraspecific p-distance of 1.0 % is observed between specimens MFNLEP-PYRALPHIL07-C08 from Mindoro and MFNLEP-PYRALPHIL10-H09 from Negros. Three haplotypes were recovered in total from the Philippines. Of the three DNA barcodes available for this species, the haplotype from Shandong, China, is recovered as the closest neighbor, while the two other haplotype from Italy are more distantly related (Fig. S2f).

Figures

Figs 32-39. Wings of Gargela, Ancylolomia and Chilo species. Fig. 32. Gargela bidentella sp. n., ♀, paratype, specimen coll.mfn-berlin.de_u_9859, right wing. Fig. 33. Ancylolomia orchidea Bleszynski, 1970, ♂, specimen coll.mfnberlin.de_u_6873a4, right half. Fig. 34. Ancylolomia westwoodi Zeller, 1863, specimen coll.mfn-berlin.de_u_8a1d13, ♂, right wing. Fig. 35. Chilo auricilius Dudgeon, 1905, specimen coll.mfn-berlin.de_u_5678ae, left wing (mirrored). Fig. 36. Chilo luteellus (Motschulsky, 1866), ♂, specimen coll.mfn-berlin.de_u_31e49, left side (mirrored). Fig. 37. Chilo infuscatellus Snellen, 1890, ♀, specimen coll.mfn-berlin.de_u_3ba9f3, left side (mirrored). Fig. 38. Chilo sacchariphagus (Bojer, 1856), ♂, specimen coll.mfn-berlin.de_u_9cde85, right half. Fig. 39. Chilo suppressalis (Walker, 1863), ♀, specimen coll.mfn-berlin.de_u_c58f13, left wing (mirrored).

Figs 94-99. Male genitalia of Ancylolomia and Chilo species. Fig. 94. Ancylolomia westwoodi Zeller, 1863, slide TL1062♂. Fig. 95. Chilo auricilius Dudgeon, 1905, adapted from fig. 38, p. 136 of Bleszynski (1970c). Fig. 96. Chilo infuscatellus Snellen, 1890, adapted from fig. 27, p. 127 of Bleszynski (1970c). Fig. 97. Chilo luteellus (Motschulsky, 1866), slide TL1319♂. Fig. 98. Chilo pulverata (Wileman & South, 1917), slide NHMUK n° 7637. Fig. 99. Chilo sacchariphagus (Bojer, 1856), slide TL1378♂.

Figs 152-155. Female genitalia of Ancylolomia and Chilo species. Fig. 152. Ancylolomia westwoodi Zeller, 1863, slide TL1220♀. Fig. 153. Chilo auricilius Dudgeon, 1905, slide TL1059♀. Fig. 154. Chilo infuscatellus Snellen, 1890, slide TL1372♀. Fig. 155. Chilo luteellus (Motschulsky, 1866), slide TL1060♀.