Disca anser Fibiger, 2010

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 81-82

Disca anser Fibiger , new species.

( Plate 10 , figure 1; male genit. plate 19, figure 3; female genit. plate 25, figure 5)

Material examined. Holotype: female, Malaysia W, Selangor, Ulu Gombak , 7–11.v.2005, leg. M. Owada, coll. NSMT.

Paratypes. 1 male, 2 females with same data as holotype; male genit. prep 5919 M. Fibiger , one female genit. prep. 5920 M. Fibiger. Colls NSMT and M. Fibiger .

Diagnosis. Imago (external). Wingspan: 12–13 mm.

Forewing: relatively narrow; light brown, suffused with dark grey-brown scales.

Crosslines: brown, terminal line marked by black interneural dots.

Reniform stigma: indistinct.

Hindwing: unicolorous light greyish brown, without discal spot.

Underside: grey.

Male genitalia. Tegumen: narrow.

Vinculum: short, stout.

Saccus: V shaped, short.

Fultura superior: present only at ventral end of tegumen, platelike, left plate twice as large as right one (apo.).

Valva: narrow, 3 times longer than broad.

Ampulla: 1.5 times longer than wide, broadest subapically (apo.).

Pollex: outer angled 60 o (apo.).

Digitus: broad, curved, apically pointed, right longer.

Juxta-anellus plate: broadest ventrally, tapered dorsad to hole for phallus (apo.).

Phallus: long, slightly S shaped medially, coecum long and narrow.

Female genitalia. Ovipositor: quadrangular, with rounded corners.

Posterior apophyses: slightly longer than ovipositor.

Anterior apophyses: slightly longer than posterior apophyses.

8 th abdominal segment: narrow, connected by membrane to 7 th segment.

Ductus bursae: membranous, as long as antrum.

Appendix bursae: arising posteriorly from ductus bursae.

Corpus bursae: globular.

Signum: cross shaped, transverse bar weaker.

Differential diagnosis. D. anser is related to D. thailandi , D. arborita , D. hackeri , and D. javai . It differs in male genitalia, in:

- juxta higher than in D. thailandi , and broader than in D. javai and D. arborita ;

- ampulla similar to that of D. arborita ; longer and narrower than in D. javai and D. thailandi ;

- right pollex with similarly angled tip, but with longer clasper-pollex than in D. thailandi ; angle in D. javai more pointed; pollex broader than in D. arboreta , that of D. hackeri short and rounded;

- right digitus goose-head shaped, broader medially than in either D. arborita and D. thailandi ; similarly broad but longer than that of D. javai ; shorter than than of D. arborita ; that of D. hackeri less angled subbasally and smoothly tapered;

- phallus subapically slightly S shaped, whereas almost straight in other Disca species ;

- ostium in more anterior position in middle of 7 th abdominal segment than in other Disca species ;

- antrum smoothly tapered from ostium to ductus bursae, not so in other Disca species.

Distribution. D. anser is known only from Malaysia, near Selangor.

Figures

PLATE 10. Figures 1–8. Disca, Bellulia, and Duplex species, adults. 1, Disca anser, male paratype, Malaysia W, Selangor; 2. Bellulia kendricki, male holotype, China, Prov. Hainan, Yinggeling,; 3, B. basalia, male holotype, Vietnam N, Suoi Loc stream; 4, B. postea, female paratype, Vietnam N, Ben En Base Camp; 5, Duplex weintraubi, male holotype, East Timor, Cova-Lima District, Tilomar; 6. D. horakae, male holotype, Australia, Northern Territory, Cobourg Peninsula; 7, D. edwardsi, male holotype, Australia, Northern Territory, Mosquito Creak; 8, D. pullata, male paratype, Austra-