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Nolasena Walker
Type
species: ferrifervens Walker.
Synonyms: Banassa
Walker
(type species rutilans Walker
= ferrifervens).
The
genus is monobasic, and has been reviewed by Lödl (1999a), who suggested it
might be close to Catada Walker in the Hypeninae, though he retained it in the
Ophiderinae. Lödl (1999b) also described the type species of Catada,
vagalis
Walker
(Sri Lanka).
The
facies is described below. The male antennae are ciliated. The labial palps have
an upcurved second segment that is long, expanded towards its apex by a dorsal
fan of scales. The third segment is less than half the length, tapering,
directed slightly downwards.
The male
abdomen, extensively illustrated by Lödl (1999a), has the eighth sternite
modified in an unusual form of the framed, corematous type, the frame
surrounding a pouch that contains a few massive, long setae centrally,
surrounded by large, paddle-like scales posteriorly and a fringe of hair-scales
anteriorly. The paddle scales themselves give way posteriorly to a field of
smaller setal bristles. The genitalia also have unusual
features such as: strong socii, giving the uncus a trifid appearance; a
lapel-like structure to the tegumen; complex rugosity and sclerotisation of the
anellus; a sinuous spine arising at the centre of the valve from the interior of
the sacculus. Catada typically has the eighth segment of the more standard
framed corematous type, the sternite with lateral rods. The uncus is highly
modified but very different from that of Nolasena,
having lateral fringes of small peg-like structures on the uncus and also a
strong scaphium. The tegumen lacks ‘lapels’. The valve is apically bilobed,
has only a weak central structure, and has a prominent corema exterior to the
sacculus.
The
female of Nolasena has a large ostial pouch posterior to the eighth
segment that narrows into a long, complex and, distally, slightly helical ductus,
with irregular areas of sclerotisation over its basal half. The corpus bursae is
ovate, with a zone of large but short spines virtually filling its basal half.
In Catada the ductus is narrow, simple. The bursa is more
elongate, with a central signum formed from a concentration and enhancement of
scobination.
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