Microchilo bundoki Léger, 2024

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 : 76-77

Microchilo bundoki Léger , sp. n.

https://zoobank.org/ 936E5278-10E2-4051-B894-85BE14F1D64D

Figs. 54 , 118 , 175 .

MATERIAL

Holotype: ♂ (specimen identifier coll.mfn-berlin.de_u_2cfadf, DNA voucher MFNLEP-PYRALPHIL01-C07 , genitalia on slide TL958♂; BOLD sample ID PYPHI024-21, Genbank Accession Number PP196718 ). PHILIPPINES: Mindoro, Mount Halcon , 1300 m, 15-17.01.1998 (W. Mey, V. Samarita) .

Paratypes: 9 ♂ (specimen identifiers MfN: coll.mfn-berlin.de_u_d9003e, f05b70, ef4378, 315da2, b4f995, e64d77, 22c8c5, daec43; PNM: id.bioseasia.org_u_023570), 6 ♀ (specimen identifiers MfN: coll.mfn-berlin.de_u_994d22, 28a23a, a5554b, 3786e7, 76e66b; PNM: id.bioseasia.org_u_02358a) (detailed information in Table S1; https://doi.org/10.5061/dryad.b8gtht7mh) .

Other specimens examined: 6 unsexed (detailed information in Table S1; https://doi.org/10.5061/ dryad.b8gtht7mh) .

SIMILAR SPECIES

Microchilo elgrecoi Błeszyński, 1966 , M. inexpectellus Błeszyński, 1965 , M. kawabei Inoue, 1989 .

DIAGNOSIS

This species ( Fig. 54 ) is somewhat larger than Microchilo spinosus sp. n. and Microchilo imminutela sp. n. and smaller than M. cebuano sp. n. The shape of the antemedian line separates M. bundoki sp. n. from M. cebuano sp. n. and M. spinosus sp. n. The wing pattern of M. bundoki sp. n. is identical to M. imminutela sp. n.; however, M. bundoki sp. n. has slightly longer forewing (5-6 mm) than M. imminutela sp. n. (3.5 mm). In male genitalia ( Fig. 119 ), this species is separated from M. kawabei and M. inexpectellus by the costal tip of the valva pointing upwards in M. bundoki sp. n., while it points posterad in M. kawabei and M. inexpectellus . Male genitalia are very similar to those of Microchilo elgrecoi but are separated from the latter by the absence of cornutus on the vesical of the phallus (one cornutus in M. elgrecoi ). From Microchilo spinosus sp. n., it is separated by the broad, bulky uncus (narrow in M. spinosus sp. n.) and the absence of cornuti on the vesica (seven cornuti in M. spinosus sp. n.). The male of M. imminutela sp. n. is not known. In female genitalia ( Fig. 176 ), the lightly sclerotized tubular colliculum and the lightly sclerotized lanceolate signum on the corpus bursae separate this species from other Philippines species. The lightly sclerotized lanceolate signum on the corpus bursae of M. bundoki sp. n. is shared with M. elgrecoi ; however, the latter species has two longitudinal ribs in place of the tubular colliculum.

HABITUS ( FIG. 54 )

Forewing length 5.0-6.3 mm (n = 5); greyish, scattered with brown scales. Antemedian line strongly bent outwards in costal half, then running straight downwards to dorsum, thin, white. Median area dark brown, with tawny longitudinal band on its middle. Postmedian line white, regularly arched. Subterminal area suffused with white scales. Margin with dark brown dots at veins. Fringes chequered dirty white and greyish brown. Hindwing greyish brown.

MALE GENITALIA ( FIG. 118 )

Uncus 7/10 X tegumen length, narrowed at basal 1/3, apex rounded, spoon-shaped. Gnathos arms projecting at connection into a short double tip. Valva ventral margin slightly convex, apex rounded; costa of valva straight, strongly sclerotized, distally projecting into a small tip pointing upwards. Juxta short, with base rounded, apex slightly incurved. Phallus stout, straight. Vesica devoid of cornuti, covered with tiny spines of ca 20 μm.

FEMALE GENITALIA (FIG. 176)

Papillae anales small, triangular in lateral view, ventrally not fused. Intersegmental membrane roughly as long as length of tergite VIII. Posterior apophyses ca 2.6 X length of tergite VIII. Intersegmental membrane VIII-IX about 2/3 X length of tergite VIII. Anterior apophyses 2.3 X length of tergite VIII. Colliculum cylindrical, lightly sclerotized, covered with minute spicules. Ductus bursae straight, narrow, roughly as long as corpus bursae. Corpus bursae ovoid, with one lanceolate signum, lightly sclerotized.

DISTRIBUTION

PHILIPPINES: Luzon, Mindoro. Collected at altitudes between 1150 and 2350 m.

DNA BARCODING

The highest intraspecific p-distance of 2.3 % is found between samples MFNLEP-PYRALPHIL01-C05 from Luzon (Nueva Vizcaya) and MFNLEP-PYRALPHIL01-C07 from Mindoro.

ETYMOLOGY

From the Tagalog “bundok” for mountain, refering to the exclusively montane distribution of the species.

REMARKS

The manuscript name “ Microchilo luzonella ” Gaskin & Shaffer was appended to a series of specimens in the NHMUK. However, this name has not been published anywhere and is hence not valid.

Figures

Figs 48-55. Wings of Catoptria, Culladia, Metaeuchromius and Microchilo species. Fig. 48. Catoptria philippinensis sp. n., ♂, paratype, specimen coll.mfn-berlin.de_u_78302c, right half. Fig. 49. Culladia hastiferalis (Walker, 1865), specimen coll.mfn-berlin.de_u_656531, right wing. Fig. 50. Culladia pseudoscoparia sp. n., specimen coll.mfn-berlin.de_u_893233, right wing. Fig. 51. Metaeuchromius micralis comb. nov., ♀, specimen coll.mfn-berlin.de_u_5b3516, right wing. Fig. 52. Metaeuchromius rizali sp. n., specimen MTD11447, right wing. Fig. 53. Metaeuchromius makintabus sp. n., specimen coll.mfn-berlin.de_u_868941, ♂, holotype, right wing. Fig. 54. Microchilo bundoki sp. n., ♂, holotype, specimen coll.mfnberlin.de_u_b4f995, right wing. Fig. 55. Microchilo cebuano sp. n., ♀, paratype, specimen coll.mfn-berlin.de_u_c18ec0, left wing (mirrored).

Figs 118-119. Male genitalia of Microchilo species. Fig. 118. Microchilo bundoki sp. n., paratype, slides TL957♂ (genitalia) and TL958♂ (phallus). Fig. 119. Microchilo spinosus sp. n., paratype, slide TL1112♂.

Figs 172-175. Female genitalia of Culladia, Metaeuchromius and Microchilo species. Fig. 172. Culladia sp., slide TL1320♀. Fig. 173. Metaeuchromius micralis (Hampson, 1919) comb. nov., slide TL997♀. Fig. 174. Metaeuchromius makintabus sp. n., paratype, slide TL1056♀. Fig. 175. Microchilo bundoki sp. n., paratype, slide TL944♀.

Figs 176-178. Female genitalia of Microchilo species. Fig. 176. Microchilo cebuano sp. n., holotype, slide TL918♀. Fig. 177. Microchilo spinosus sp. n., paratype, slide TL1208♀. Fig. 178. Microchilo imminutela sp. n., paratype, slide TL1209♀.