Chlamydastis iangauldi Phillips and Brown, 2021

Phillips-Rodríguez, Eugenie, Brown, John W., Hallwachs, Winnie & Janzen, Daniel H., 2021, Chlamydastis Meyrick of Costa Rica: barcodes, biology, and descriptions of 36 new species (Lepidoptera: Depressariidae), Insecta Mundi 2021 (868), pp. 1-96 : 12-13

Chlamydastis iangauldi Phillips and Brown , new species

Figures 8 , 56

Holotype. Male, Costa Rica, Limón, Sector Cerro Cocorí, Finca de E. Rojas, 150 m, 26.vi–16 vii.1992, E. Rojas, INBIOCRI000696328 ( MNCR-A).

Paratypes (10♂, 3♀). See Appendix 1.

Diagnosis. Chlamydastis iangauldi is superficially very similar to C. lindapitkinae . The two species can be distinguished by features of the male genitalia: in C. iangauldi the uncus is extremely small and the cornuti are clustered at one end of the vesica, whereas in C. lindapitkinae the uncus is larger, and the cornuti are arranged in an irregular line.

Description. MALE ( Fig. 8 ). Head. Frons white; vertex white anteriorly to about base of antennae, then yellowish, collar brown; labial palpus cream, first and second segment with a contiguous dark brown lateral band extending to ca. 0.5 length of second segment; antenna with sensory setae ca. 1.5 times width of flagellomere. Thorax. Dorsum and tegula yellowish brown. FW length 7.5–7.8 mm; FW ground color cream; two oblique fasciae formed by small brown spots, originating at costa ca. 0.40 (median) and 0.75 (distal) length of FW, joined at mid-termen by a slightly larger dark spot; distal fascia extremely weak, represented mostly by a series of tiny dark brown dots; a small dark brown dot at costa ca. 0.15 distance from base to apex. HW dark grayish brown. Abdomen. Externally brownish, except first segment paler dorsally. Genitalia ( Fig. 56 ) with uncus extremely small; valva as described for species group; sacculus ca. 0.33 length of valva; lateral processes of juxta slender with a rounded tip; vesica with cornutus platelike with a series of pointed projections clustered at distal end ( Fig. 56a ).

FEMALE. Head and Thorax. Essentially as described for male, except sensory setae of antenna short, sparse; FW length 9.3–9.6 mm. Abdomen. Genitalia (not illustrated) essentially as described for C. lindapitkinae .

DNA barcodes. We have no sequence data for this species.

Distribution. Chlamydastis iangauldi has been collected in the Caribbean lowlands at elevations between 150 and 200 m.

Biology. The larval host and immature stages are unknown.

Etymology. Chlamydastis iangauldi is named in honor of Ian Gauld in recognition of his curatorial and taxonomic contributions to the national biodiversity inventory of Costa Rica.

Curviliniella Species Group

The Curviliniella Species Group is composed of 13 species, five of which occur in Costa Rica. The members share similar male genitalia with a relatively short, stout uncus from a broad base; the absence of the gnathos; a twopart valva with a variable elongate-ovate dorsal part that is rounded or truncate apically, and a large, irregularly triangular basal part represented by the sacculus, the latter of which bears a dense hairpencil of long (usually much longer than the valva), fine setae; apically truncate lateral processes of the juxta that curve towards each other distally; and a phallus with one or two slender, apically-pointed sclerites. Females have a short, broad ductus bursae with an ill-defined junction with the corpus bursae (except for C. curviliniella ); a membranous region around the ostium; and a rounded-diamond-shaped, spiny signum situated near the middle of the corpus bursae with an uninterrupted line of sclerotization extending from end to end.

The eight species in the group not recorded from Costa Rica are C. curviliniella (Busck) , described from Panama; C. forcipata (Meyrick, 1913) , described from Colombia and illustrated by Clarke (1955: 187); C. bifida ( Meyrick, 1916) , described from French Guiana and illustrated by Clarke (1955: 179); C. monastra (Meyrick, 1909) , described from Peru and illustrated by Clarke (1955: 195); C. perducta ( Meyrick, 1916) , described from French Guiana and illustrated by Clarke (1955: 199); C. plocogramma (Meyrick, 1915) , described from British Guiana and illustrated by Clarke (1955: 199); C. steloglypta (Meyrick, 1931) , described from French Guiana and illustrated by Clarke (1955: 204); and C. tritypa (Meyrick, 1909) , described from Peru and illustrated by Clarke (1955: 204).

The five Costa Rican species share similar forewing maculation. The ground color is whitish or pale gray and there usually is a longitudinal line or dash through the discal cell terminating in a pale dot at the end of the cell (lacking in C. bobandersoni ). The specialized (arrowhead) setae of the male genitalia originate near the distal termination of the costa of the valva in C. anniapicadoae and C. antonioazofeifai , and from the costa slightly more basal in C. bernardoespinozai , C. marianofigueresi , and C. bobandersoni . The female genitalia have a lightly sclerotized sterigma, a narrow sclerotized band near the posterior end of the ductus bursae, and in some of the species with the posterior 0.33 of the ductus bursae sclerotized. The corpus bursae is ovate with the signum large ( C. bernardoespinozai , C. marianofigueresi ) or absent ( C. bobandersoni ). Two species of the group ( C. bernardoespinozai and C. bobandersoni ) have been reared on Sapotaceae ( Table 1).

Figures

Figures 1–8. Adults of Chlamydastis from Costa Rica – Vividella Species Group. 1) C. vividella, male, 10-SRNP- 1443. 2) C. vividella male, green form, 11-SRNP-20863. 3) C. vividella, female, 10-SRNP-1457. 4) C. abelulatei, holotype, male 10-SRNP-2669. 5) C. carolinagodoyae, holotype, male, INBIOCRI000625666. 6) C. angelsolisi, holotype, male, 08-SRNP-108399. 7) C. lindapitkinae, holotype, male, INB0003545629. 8) C. iangauldi, holotype, male, INBIOCRI000696328.

Figures 51–56. Male genitalia (phallus detached) of Chlamydastis from Costa Rica – Vividella Species Group. 51) C. vividella, 09-SRNP-69457 (u = uncus; g = gnathos; lp = lateral process of the juxta; vl = valva; ct = cornuti plates). 52) C. abelulatei, holotype, 09-SRNP-69457 (52a = detail of specialized setae). 53) C. carolinagodoyae, paratype, INB00CR0001410730. 54) C. angelsolisi, paratype, (54a = detail of cornuti) 07-SRNP-112603. 55) C. lindapitkinae, paratype, INBIO0001999736, (55a = detail of cornuti). 56) C. iangauldi, paratype, INB000588749, (56a = detail of cornuti).