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Fascellina quadrata sp. n.
Fascellina quadrata  (paratype) |
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14-15mm. The species is smaller than the previous two and lacks a white
discal patch on the forewing. It is a deep, rather maroon brown, fading to a
more mottled red brown and yellowish colour in which darker fasciae are more
evident than in castanea or albicordis. On the underside of the
forewing the postmedial and submarginal do not enclose a darker brown area, but
the postmedial is a strong, dark brown transverse fascia. The medial and
submarginal fasciae of the hindwing underside are more widely separated than in castanea,
with a faint discal lunule just distal to the centre of the medial. In the
male genitalia the apex of the gnathus is diagnostically broadened,
square-ended.
Holotype . SARAWAK: Gunong Mulu Nat.
Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), BM 1978-206, Site 16,
March, Long Pala (Base) 70m, 324450, Alluv./secondary forest, BM geometrid slide
12717.
Paratypes: 1 as
holotype: 1 SARAWAK: Santubong Mt. 300m
10.ix.1981 (Oxford Far East Exp.) BM geometrid slide 12714; 4
SARAWAK: Bidi (C.J. Brooks) (various dates and label styles).
Geographical range. Borneo, Sumatra.
Habitat preference The species is found in similar lowland habitats to those of castanea.
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