Tactusa nieukerkeni Fibiger

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119: 23-24

publication ID

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

DOI

http://doi.org/10.5281/zenodo.5459402

persistent identifier

http://treatment.plazi.org/id/7C67FC6F-2D25-FFBF-FF28-FC0FEC237438

treatment provided by

Felipe

scientific name

Tactusa nieukerkeni Fibiger
status

new species

Tactusa nieukerkeni Fibiger   , new species

( Plate 2, figure 6; male genit. plate 13, figure 2)

Material examined. Holotype: male, Vietnam, Vinh Phuc, Tam Dao , UTM 48 Q Wj 6773 ( WGS84), 1000 m, 26.ix.2003, leg. E.J. v. Nieukerken & C. Vd Berg, genit. prep. 5798 M. Fibiger, coll. RMNH.  

Taxonomic notes. T. nieukerkeni   is a member of the T. nieukerkeni   species-group, which has a blackish triangular or quadrangular patch between the antemedial and postmedial lines, the typical Tactusa   ampulla, and prominent features listed under the species-group and below.

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

Forewing: ground colour light yellow, with acutely-angled blackish patch in upper medial area, black subterminal area and a small black patch on costa between medial patch and apex.

Crosslines: only subterminal and terminal lines indicated; former inwardly outlined by light yellow, latter by interneural black spots.

Reniform stigma: well marked, white, outlined black.

Male genitalia. Tegumen: narrow.

Vinculum: strongly built.

Saccus: long; strongly built, prominently V shaped.

Fultura superior: membranous.

Valva: slightly asymmetrical, left one broader.

Ampulla: forming a cross with axis of valva; slightly asymmetrical, broadest by valva, dorsal arm with long, spinelike, pointed process (apo.).

Digitus: present, narrowly triangular, rounded at tip (apo.).

Juxta and anellus plate: fused (in preparation broken dorsally).

Phallus: long, S shaped, coiled.

Vesica: apically with four, small, narrow, pointed cornuti (apo.).

Female genitalia. Unknown.

Differential diagnosis. T. nieukerkeni   differs from all other Micronoctuidae   from SE Asian and Oriental regions in shape of ampulla, with long spine, narrow, apically blunt digitus, and four small, narrow cornuti in vesica of phallus.

Distribution. Known from one specimen from N Vietnam.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Lepidoptera

Family

Erebidae

Genus

Tactusa