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Tetropium
guatemalanum
Classification
Diagnostic Features of Larvae
- Mature larva. Rather similar to those of Arhopalus but differing as follows. Head transverse, with sides only slightly wider behind middle; genal setae mostly arising from ferruginous basal dots, which give the genae a spotted appearance. Frons distinctly darker than epicranial halves. Antenna with apical segment quadrate to transverse. Mandible without an oblique plate along edge of dorsal surface and bearing fewer setae. Labrum transversely ovate, about twice as wide as long. Gula much shorter, not more than half as long as hypostomal sutures. Maxillary palpi with apical segment almost as long as second segment. Prothorax as in Asemum. Abdomen with urogomphi subcontiguous, slender and spine-like. Legs with femur and tibiotarsus distinctly ferruginous. Spiracles of abdomen with peritreme subcircular and with two protuberant subcontiguous tubes on posterior margin. Length up to 19 mm; maximum breadth (at prothorax) 5 mm.
Pupa. Not available. The following is a description of that of the Palaearctic Tetropium gabrieli. Similar to that of Asemum striatum, but differing as follows. Head with two to six short pale spines on vertex. Antennae transversely rugose, densely spiculate, the basal segment with about six testaceous spines near apex of basal segment, and remaining segments with scattered, much smaller spines; extending as far as abdominal segment 2. Maxillary palpi broadly truncate at apex. Pronotum elongate, with sides moderately rounded, and vertex with a pair of paramedian, longitudinal furrows ; vertex and front margin with numerous conical papillae (each with an apical seta). Mesonotum glabrous; scutellum with a few minute setae. Abdomen with tergites 1-6 bearing two oval groups of spines (each with a subapical seta). Tergite 7 with a few scattered spines. Tergite 8 often, and 9 always, glabrous. Legs with a row of spines (with apical setae) near apex of each femur. Functional spiracles with peritreme slightly raised in anterior half. Length up to 16 mm; maximum breadth 3.75 mm. Adapted from Duffy (1960).
Biology and Economic Importance
- Biology and economic importance for this taxon coming soon.
Selected References to Larvae Specimens
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