Gargela bidentella 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 : 43-44

Gargela bidentella Léger , sp. n.

https://zoobank.org/E927154D-E665-4992-BF07-6694A7084C50

Figs. 32 , 91 , 149 .

MATERIAL

Holotype: ♂ (specimen identifier coll.mfn-berlin.de_u_dc6875, DNA voucher MFNLEP-PYRALPHIL08-E05 , genitalia on slide TL1325♂; BOLD sample ID PYPHI202-22, Genbank Accession Number PP196883 ). PHILIPPINES: Negros, Negros Oriental, Patag , 750 m, 20-25.05.1996 (W. Mey). Deposited in MfN .

Paratypes: 2 ♀ (specimen identifiers coll.mfn-berlin.de_u_9859, 673744), same collecting data (detailed information on Table S1; https://doi.org/10.5061/ dryad.b8gtht7mh) .

SIMILAR SPECIES

Gargela minuta Song et al., 2009 .

DIAGNOSIS

This species is very similar to Gargela minuta in forewing pattern (see diagnosis of G. minuta ). In male genitalia ( Fig. 91 ), the bifid apical projection of the costal process allows unambiguous segregation of the species from other Gargela species. In female genitalia ( Fig. 149 ), this species shares the elongate corpus bursae with two thorn-shaped signa with G. minuta ; however, the antrum lacks the ventral, lightly sclerotized depressions observed in G. minuta .

HABITUS ( FIG. 32 )

Forewing length 4.5 mm (n = 1); ground color snow white. Median line arched towards margin in costal 1/3, then running in a straight line down to termen. Subterminal line originating at 3/4 of costa, curved towards margin, then inwardly around subterminal spot, running downwards to termen; dark brown from R5 to M2, otherwise ochre. Subterminal area with conspicuous dark brown blotch at M3 cell. Margin slightly indented at R5-M1; apically dark brown, otherwise ochre. Fringe white, medially copper with four dark brown spots. Hindwing white, tornus bearing tuft of thin brown iridescent scales in males.

MALE GENITALIA ( FIG. 91 )

Uncus ca 1/3 of tegumen arm length, narrow, beak-shaped, ventrally covered with thick setae, dorso-apically setose, apex pointed. Gnathos projection as long as uncus, straight, apical 1/4 curved upwards, tip pointed. Valva ventrally narrowed at midlength, distal half slender, gently curved upwards; costal process fused to valva in basal 3/4; basal 1/3 with slender arm projecting dorso-posterad; distal 1/4 projecting upwards, apically bifid with one tooth pointing upwards and one hook-like projection pointing inwards. Juxta broad, distal 1/3 with conspicuous lateral lobes, apex forming two lobes setose. Vesica with ca 200 cornuti, apex with one isolated cornutus.

FEMALE GENITALIA ( FIG. 149 )

Papillae anales posterior margin regularly rounded. Posterior apophyses ca 1.75 X length of tergite VIII. Intersegmental membrane VIII-IX ca 1.75 X length of tergite VIII. Anterior apophyses ca 3.75 X length of tergite VIII. Antrum and colliculum lightly sclerotized, with longitudinal ridges. Basal half of ductus bursae covered with spines, kink at midlength, distal half membranous, straight. Corpus bursae egg-shaped, reticulate, with two thorn-shaped signa.

DISTRIBUTION

PHILIPPINES: Negros. Collected at an altitude of 750 m.

DNA BARCODING

The highest intraspecific divergence observed is 0.5% between specimen MFNLEP-PYRALPHIL08-H06 and MFNLEP-PYRALPHIL08-F05.

ETYMOLOGY

Apposition of the Latin bi -, “two,” dens, tis, “dent,” and the diminutive suffix –ella, referring to the two apical teeth of the costal process in male genitalia.

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 88-93. Male genitalia of Gargela and Ancylolomia species. Fig. 88. Gargela acutibrachium sp. n., paratype, slide TL1205♂. Fig. 89. Gargela polyacantha Li, 2019, slide TL1206♂. Fig. 90. Gargela xanthocasis (Meyrick, 1897), slide TL1235♂. Fig. 91. Gargela bidentella sp. n., holotype, slide TL1325♂. Fig. 92. Ancylolomia chrysographellus (Kollar & Redtenbacher, 1844), adapted from fig. 1, p. 29 of Bleszynski (1970b). Fig. 93. Ancylolomia orchidea Bleszynski, 1970, slide TL1221♂.

Figs 148-151. Female genitalia of Gargela and Ancylolomia species. Fig. 148. Gargela xanthocasis (Meyrick, 1897), slide TL1236♀. Fig. 149. Gargela bidentella sp. n., paratype, slide TL1327♀. Fig. 150. Ancylolomia chrysographellus (Kollar & Redtenbacher, 1844), adapted from fig. 5, p. 31 of Bleszynski (1970b). Fig. 151. Ancylolomia orchidea Bleszynski, 1970, adapted from fig. 15, p. 34 of Bleszynski (1970b).