Tactusa major Fibiger

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119: 15

publication ID

http://doi.org/ 10.11646/zootaxa.2583.1.1

DOI

http://doi.org/10.5281/zenodo.5459386

persistent identifier

http://treatment.plazi.org/id/7C67FC6F-2D3D-FFA6-FF28-FB5EECE871F0

treatment provided by

Felipe

scientific name

Tactusa major Fibiger
status

new species

Tactusa major Fibiger   , new species

( Plate 1, figure 1; female genit. plate 22, figure 1)

Material examined. Holotype: female. Thailand, Chiang Mai Prov., Doi Inthanon Nat. Park , ca. 800 m, 24.x.1984 (O. Karsholt et al.), genit. prep. 2940 M. Fibiger, coll. ZMUC.  

Taxonomic notes. T. major   is a member of the T. sumatrensis   species-group in which all species have a dark triangular apical extension of the medial triangle on the forewing, apex itself forming one angle, a second angle at costal edge of antemedial line and a third angle at termen by dorsum: the large triangle is actually composed of two triangles, one of which is the costal patch between antemedial and postmedial lines, with unequal sides, and the other is an equilateral triangle, with apex of the forewing as one angle.

Diagnosis. Imago (external). Wingspan: 11 mm.

Forewing: dominated by blackish oblique band; yellow patch proximal to apex (apo.).

Crosslines: only terminal line, indicated by small, black interneural spots.

Reniform stigma: present at outer edge of band.

Hindwing: dark grey, with indistinct discal spot.

Underside: unicolorous grey.

Abdomen: grey with black crest dorsally on first segment.

Male genitalia. Unknown.

Female genitalia. Ovipositor: quadrangular with rounded corners.

Posterior apophyses: longer than anterior apophyses and ovipositor.

Anterior apophyses: slightly longer than 8 th abdominal segment.

Ostium: displaced to left.

Antrum: prominent; long; with medial swelling (apo.).

Ductus bursae: membranous, long, narrow; 1.5 times longer than diameter of corpus bursae.

Appendix bursae: arising anteriorly from ductus bursae, immediately posterior to antrum.

Corpus bursae: globular.

Signum: cross shaped.

Differential diagnosis. T. major   differs from other Micronoctuidae   from SE Asian and Oriental regions in yellow patch in blackish triangle, black oblique band and, in female genitalia, in swelling in antrum.

Distribution. Known from a single specimen from N Thailand.

ZMUC

Zoological Museum, University of Copenhagen

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Lepidoptera

Family

Erebidae

Genus

Tactusa