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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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