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Ancylonotus tribulus
Classification
Diagnostic Features of Larvae
- Mature larva. Length up to 43 mm; maximum breadth (at prothorax) 12.5 mm. Head moderately depressed, slightly elongate, subparallel-sided, widest before middle (maximum head-width 5.5 mm) and slightly constricted at middle. Frontal sutures distinct for entire length; antennal foramen open behind; mouthframe strongly and broadly sclerotized. Anterior half of frons ferruginous and smooth. Gena very strongly sclerotized and pitchy. Ocelli indiscernible. Hypostoma slightly convex, ferruginous, with front margin narrowly pitchy; setiferous pores absent; sutures straight, strongly converging posteriorly, pitchy. Gular region with a very thin, pale, median cleavage line. Antenna 2-segrnented; segment 2 about twice as long as broad and bearing a minute hyaline process. Maxilla with palpal segment 3 acutely conical, shorter than segment 2. Labial palpi with segment 2 less than half length of segment 1. Mentum distinct from submentum. Clypeus glabrous. Prothorax depressed, with posterior half of pronotum micro-spiculate and with scattered coarse setae. Abdomen with each dorsal ampulla with two transverse furrows and entirely covered with small oval spiculate tubercles. Tergite 9 unarmed. Anus trilobate. Legs absent. Spiracles with peritreme thick and broadly oval.
Pupa. Readily distinguishable from those of Batocera species by the following characters. Length not exceeding 27 mm; maximum breadth not exceeding 1O mm. Head with front sparsely setose. Mandibles with only two to three setae on middle of outer face. Pronotum with a pair of paramedian, tuberculate, conical protuberances. Elytra each with a pair of tuberculate protuberances near base. Abdomen with tergites 2-5 bearing two transverse rows of stout, closely set spines. Adapted from Duffy (1957).
Biology and Economic Importance
- Biology unknown for members of this tribe. Species of this tribe are potentially invasive outside their native range.
Selected References to Larvae Specimens
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