Blastobasis thyone Adamski

Adamski, David, 2013, Review of the Blastobasinae of Costa Rica (Lepidoptera: Gelechioidea: Blastobasidae), Zootaxa 3618 (1), pp. 1-223 : 48-49

Blastobasis thyone Adamski , new species

( Figs. 95–96 , 291 , 334 , Map 13)

Diagnosis.— Blastobasis thyone is similar to B. babae in facies but differs from the latter by having a longer uncus; a narrower gnathos; the sockets of tergal setae not extending beyond the midlength of the tegumen; a more acutely curved apical process of the ventral part of the valva; a less spinose apicoventral margin of the proximal flange of the dorsal part of the valva; and a slightly longer phallus.

Description.—Head: Scales on vertex, frontoclypeus brown tipped with pale brown. Outer surface of labial palpus dark brown intermixed with pale-brown scales along apical margins of segments 1–2, inner surface pale brown. Antennal scape and pecten brown; first flagellomere in male dilated, inner surface of dilated part with 23 palmate sex scales (n=1), ( Fig. 291 ). Proboscis brown.

Thorax: Tegula and mesonotum agouti patterned, with basal and apical 1/3s brown, middle 1/3 pale brown. Legs with brown scales tipped with pale brown intermixed with pale-brown scales near midsegments and along apical margins of all segments and tarsomeres. Forewing ( Fig. 334 ): Length 5.6 mm (n = 1), with brown scales tipped with pale brown intermixed with brown and pale-brown scales; submedian fascia faint; cell with three darkbrown spots, one near middle, two on apical end along crossvein; marginal spots brown. Undersurface brown. Hindwing: Translucent pale brown.

Abdomen: Male genitalia ( Figs. 95–96 ): Uncus nearly parallelsided from base to 2/3, abruptly narrowed apically, forming rounded apex, slightly downcurved, sparsely setose, shorter than width of anal opening. Dorsal strut of tegumen absent. Gnathos narrow, confluent with tegumen, posteroventral margin greatly protracted mesially, bidentate. Sockets of tergal setae not extending beyond midlength of tegumen. Valva divided; ventral part angled dorsolaterally from beyond base, narrowed apically, forming inwardly curved spinelike process; process setose on outer surface, planate on inner surface; ventral margin setose from about 1/5, upturned slightly, forming narrow fold to near slightly raised setose lobe at base of apical process; dorsal part with apical portion of costa extending dorsolaterally, forming setose digitate process; area beneath costa overlaid with sparse microtrichiate membrane, extending above and below phallus to opposite side; basal ridge of digitate process protracted ventrally fusing with dorsolateral ridge of proximal flange; ventral margin of proximal flange linear, extending laterally to a broadly rounded, apicoventral ridge; proximal flange bearing sparse microtrichiae. Juxta bandlike. Vinculum semicircular. Phallus and sclerite of phallus shorter than valva; phallus bulbous basally, sclerite of phallus sigmoidshaped; anellus slightly narrowed from widened base, broadly rounded apically, setose. Female Genitalia: Unknown.

Holotype, 3, “Estac[ión] Quebrada Bonita, 50 m, R[eserva] B[iológia] Carara, Punt[arenas] Pr[ovincia], COSTA RICA, Oct[ubre] 1989, R. Zuniga, L-N-194500, 469850”, “INBio: COSTA RICA: CRI000, 160848 ” [barcode label], “INBio 3 Genitalia Slide by D. Adamski, No. 3896” [yellow label].

MAP 13. Distribution of Blastobasis thyone (●) and B. usurae (˔).

Distribution (Map 13). Blastobasis thyone is known from one collecting site along the southwestern coast of Costa Rica near the mouth of the Gulfo de Nicoya.

Etymology. The specific epithet thyone is chosen in honor of Thyone , mother of Bacchus.

Figures

FIGURES 93 – 98. Male genitalia of Blastobasinae. 93 – 94, Blastobasis babae (slide 3939). 95 – 96, Blastobasis thyone (slide 3896). 97 – 98, Blastobasis usurae (slide 3443).

FIGURES 284 – 291. Male sex scales on first flagellomere of Blastobasis. 284, Blastobasis iuanae. 285, Blastobasis graminea Adamski, 1999. 286, Blastobasis xiphiae. 287, Blastobasis neniae. 288, Blastobasis achaea. 289, Blastobasis orithyia. 290, Blastobasis babae. 291, Blastobasis thyone.

FIGURES 328 – 335. Imagos of Blastobasinae. 328, Blastobasis xiphiae, holotype. 329, Blastobasis graminea Adamski, 1999. 330, Blastobasis neniae, holotype. 331, Blastobasis achaea, holotype. 332, Blastobasis orithyia, holotype. 333, Blastobasis babae, holotype. 334, Blastobasis thyone, holotype. 335, Blastobasis usurae, holotype.