Calamotropha obliterans (Walker, 1863)

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 : 57-58

Calamotropha obliterans (Walker, 1863)

Figs. 41 , 103 , 161 .

Crambus obliterans Walker, 1863: 169 , 170. Type locality: [Malaysia] Sarawak, Borneo.

= Crambus candidifer Walker, 1863: 170 , 171

= Crambus candifer Hampson, 1896c: 934

= Crambus condidifer Błeszyński & Colling, 1962: 223

= obliteranus (Hua, 2005: 52) ( Crambus )

Calamotropha obliterans Błeszyński, 1961 , pp. 168, 169; pl. 24, fig. 20; pl. 47, fig. 111; pl. 66, fig. 204

MATERIAL

4 ♂, 1 unsexed (detailed information in Table S1; https://doi.org/10.5061/dryad.b8gtht7mh) .

SIMILAR SPECIES

Calamotropha formosella Błeszyński, 1961 , C. okanoi Błeszyński, 1961 .

DIAGNOSIS

Calamotropha obliterans can be separated from other Calamotropha species by the following characters of the forewing: ground color cream, costa dark brown, median line on costal half evenly arched outwardly, forming a dot at midlength, then fading towards dorsum; median discoidal marked spot; subterminal line arched outwards near costa, cream, basally thinly edged with dark brown. Błeszyński (1961) states that the habitus of C. obliterans resembles that of C. formosella and C. okanoi . The genitalia enable unambiguous separation from these two species. In the male ( Fig. 103 ), the valva apex is broadly notched ventrally (notch smaller in C. okanoi ), the valva apex is pointed (rounded in C. formosella ), and the vesica bears one medium and small cornuti (no cornuti in C. formosella , one single cornutus in C. okanoi ). In female genitalia, the ventral, evenly curved plate of the antrum separates this species from other Calamotropha species.

REDESCRIPTION OF FEMALE GENITALIA ( FIG. 161 )

Posterior apophyses ca 5/4 of length of tergite VIII length, medially larger. Anterior apophyses ca 1.5 X tergite VIII length, narrowed on distal half. Antrum forming ventral evenly curved plate. Ductus bursae ca 1/4 of corpus length, straight. Corpus bursae not well demarcated from ductus bursae, elongate, membranous, devoid of signum.

DISTRIBUTION

MALAYSIA: Sabah, Sarawak; PHILIPPINES: Leyte, Luzon, Palawan, Samar. Collected at altitudes between 50 and 500 m.

DNA BARCODING

The species delimitation analysis recovered four different MOTUs within C. obliterans for the specimens from Leyte, Luzon (Zambales), Palawan, and Samar (one MOTU each). A maximum intraspecific p-distance of 6.7% is found between samples MFNLEP-PYRALPHIL09-C08 from Luzon (Zambales) and MFNLEP-PYRALPHIL09-A08 from Palawan.

REMARKS

The species was described from a female from Sarawak by Walker. Błeszyński could not locate any male specimen from Borneo in the collections he visited ( Błeszyński, 1961), so he investigated a male specimen from Palawan. He states that this male “seems to be conspecific with Calamotropha obliterans (Walk.) ”. The unique female investigated here does not match the drawing by Błeszyński (1961). The original slide is a poor-quality dissection where the corpus bursae and part of the ductus have presumably been lost.

Figures

Figs 40-47. Wings of Eschata, Calamotropha and Angustalius species. Fig. 40. Eschata cf. rififi Bleszynski, 1965, ♂, specimen coll.mfn-berlin.de_u_bf466f, right half. Fig. 41. Calamotropha obliterans (Walker, 1863), ♂, specimen coll.mfnberlin.de_u_7aa174, right wing. Fig. 42. Calamotropha philippinensis sp. n., ♂, paratype, specimen coll.mfnberlin.de_u_f30a8c, right half. Fig. 43. Calamotropha anacantha sp. n., ♂, holotype, specimen coll.mfnberlin.de_u_1609c7, right wing. Fig. 44. Calamotropha unicolorellus (Zeller, 1863), ♂, specimen coll.mfnberlin.de_u_294fbd, right wing. Fig. 45. Calamotropha sp. 1 cf. oculalis, ♂, specimen coll.mfn-berlin.de_u_1e3488, right wing. Fig. 46. Calamotropha sp. 2 cf. oculalis, ♂, specimen coll.mfn-berlin.de_u_a7f185, right wing. Fig. 47. Angustalius malacelloides (Bleszynski, 1955), specimen coll.mfn-berlin.de_u_e7300e, right half.

Figs. 100-105. Male genitalia of Chilo, Eschata and Calamotropha species. Fig. 100. Chilo suppressalis (Walker, 1863), adapted from fig. 120, p. 180 of Bleszynski (1970c). Fig. 101. Eschata cf. miranda Bleszynski, 1965, slide TL1215♂. Fig. 102. Calamotropha atkinsoni Zeller, 1863, adapted from fig. 129, plate LI of Bleszynski (1970b). Fig. 103. Calamotropha obliterans (Walker, 1863), slide TL1304♂. Fig. 104. Calamotropha unicolorellus (Zeller, 1863), slide TL1405♂. Fig. 105. Calamotropha philippinensis sp. n., paratype, slide TL1211♂.

Figs 160-163. Female genitalia of Calamotropha species. Fig. 160. Calamotropha atkinsoni Zeller, 1863, adapted from fig. 189, plate LXIII of Bleszynski (1970b). Fig. 161. Calamotropha obliterans (Walker, 1863), slide TL1383♀. Fig. 162. Calamotropha unicolorellus (Zeller, 1863), slide TL1381♀. Fig. 163. Calamotropha philippinensis sp. n., paratype, slide TL1225♀.