Longiantrum quadra Fibiger, 2010

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 58

Longiantrum quadra Fibiger , new species

( Plate 7 , figure 4; male genit. plate 17, figure 1)

Material examined. Holotype: male, N Vietnam, Tonkin, Cha pa, leg. Gételot, 1920–1932, coll. L. & J. De Joannis, Museum Paris, genit. prep. 3946 M. Fibiger, coll. MNHM.

Paratype: male, N. Vietnam, Da Lat , near institute, 10.xii.1994, leg. S. Mahunka, Gy. Sziraki & L. Zombori, genit. prep. 5927 M. Fibiger, coll. HNHM .

Diagnosis. Imago (external). Wingspan: 10 mm.

Head, patagia, anterior part of tegulae, prothorax, basal part of costa, costal part of medial area, and terminal area, including fringes: dark brown, costal medial area quadrangular.

Forewing ground colour: yellow; with brown patches, especially along subterminal and terminal lines.

Crosslines: absent, except indistinct beige subterminal line.

Terminal line: marked by black interneural dots.

Reniform stigma: indistinct, ovoid, white.

Hindwing: light grey, fringes beige.

Underside: forewing light brown, hindwing light grey.

Male genitalia. Tergite: Y-shaped plate present (apo.).

Tegumen: narrow throughout.

Vinculum and saccus: very stout, three times as broad as tegumen.

Saccus: short; broadly U shaped.

Valvae: broadest at ¾; strongly asymmetrical; right valva larger; dorso-basally with small, thornlike process (apo.).

Clasper: barlike, along valva margins (apo.).

Ampulla: bilobed; prominently asymmetrical; left one larger and longer; lobes at valva almost straight ventrally; posteriorly rounded; each shaped as ¾ of a circle (apo.).

Digitus: tiny, triangular.

Juxta: trapezoid, medially narrowest, heavily sclerotised (apo.).

Anellus: prominently asymmetrical, relatively short, clublike, on right side with pointed process (apo.).

Phallus: extremely long; straight anteriorly; S-curved and coiled clockwise from ductus ejaculatorius; coecum short, apically rounded (apo.).

Vesica: armed with tiny cornuti.

Differential diagnosis. L. quadra differs from other Longiantrum species in:

- broad beige subterminal line;

male genitalia, in

- vinculum and saccus very wide, loglike;

- ampulla shaped as ¾ of a circle, asymmetrical;

- anellus short, clublike;

- phallus like a moving snake, broadest at coecum.

Distribution. L. quadra known only from N Vietnam.

Figures

PLATE 7. Figures 1–8. Longiantrum, Abes, Asyprocessa, Tantulius, and Asymelissa species, adults. 1, Longiantrum coclea, female holotype, Vietnam N, Ban En Base Camp; 2, L. legraini, female holotype, Thailand, Loei; 3, L. burmaensis, male holotype, Myanmar N, Htawgaw; 4, L. quadra, male holotype, Vietnam N, Tonkin; 5, Abes vedi, female holotype, Thailand N, Chiang Mai; 6, Asyprocessa wapi, male holotype, Laos, Wapi; 7, A. laevi, female holotype, Thailand, Chiang Mai; 8, A. spinus, male holotype, Malaysia W, Penang.