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Xylinophylla Warren
Type species: ochrea Warren (Kei Is).
Synonym: Adelphocrasta Warren (type species hypocausta Warren).
Xylinophylla is also best defined on genitalic features. The coremata of the male
abdomen have already been mentioned but there is also a pair associated with the
vinculum. The uncus and tegumen are less massive than in Gonodontis. The
valve is divided, with a dorsal laminate portion resembling the valve of Gonodontis
and a narrow, spine-like ventral part that is about two thirds the length of
the upper part. There is usually some sort of spur or spining between these two
parts of the valve. X. flavifrons Warren (Solomons) has a broad costal
zone of the valve somewhat distinct and lacking setae. The aedeagus is without
extensive apical spining but may have the apex produced into a single spine. The
vesica is more tubular than in Gonodontis and either lacks cornuti or
bears a single sclerotised lobe in the basal half (in flavifrons and hypocausta
and a species in Sulawesi). The female genitalia (hypocausta) have
the bursa large, spindle-shaped, fluted longitudinally throughout, and with a
ring of small triangular blades girdling it at one-third from its base. The male
antennae are ciliate.
There is only one species in Sundaland, the biology of which is known
and described below. The genus is more diverse in Australasia, though many of
the names involved, with those of the Sundanian species, have been placed as
synonyms of X. maculata Warren (New Guinea), but probably only ochrea Warren
is correctly so placed, both taxa having a single, rather scobinate spur between
the two arms of the valve. There is a second species in New Guinea (slide 13105)
with only a short ventral arm but with the intermediate zone ornamented with a
short, broadly based triangular process and a longer, multiplespined, trapezoid
flange. X. flavifrons from the Solomons lacks any intermediate spur and
has other distinguishing features already mentioned. The species in Sulawesi has
a short, acute spur in the cleft between the two arms and a longer, slender one,
with a few small accessory spines, set more distally on the ventral margin of
the upper part of the valve (slide 13104).
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