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ANOBIIDAE
Author: John F. Lawrence, 2001. |
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Suborder Polyphaga, Series Bostrichiformia, Superfamily Bostrichoidea. |
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Antenae with 11, or rarely 3 or rarely 8 to 10 segments, filiform or serrate or pectinate or rarely flabellate, or with 3 or rarely 1 segment club. Antennal insertions exposed or concealed. Visible portion of procoxa globular to projecting bellow prosternum with the trochantin concealed to at least partly exposed. Procoxal cavity externally open and internally closed. Mesocoxae separated by 0.4 to more than 1 coxal width, with mesocoxal cavity laterally closed. Tarsal formula 5-5-5. Numberof ventrites 5 with 2 or 3 connate. Body length 1.1-7 mm. Broadly ovate to elongate, glabrous to pubescent. Head usually attached ventrally and not visible from above, often fitting into excavate prothorax; body often very compact. 3-segmented antennae only in Gnostus. Antennal club, when present, usually large, loose and asymmetrical. |
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Anobiidae are diverse in form and often confused with members of other families. The commonly encountered anobiids, especially in tropical areas are compacted, with the prothorax excavated ventrally so that it fits over the bases of the elytra and encloses the head and antennae (lower right). The Ptininae are very different in form and include the so-called spider beetles (second figure). Another unusual form in the Neotropical region is Gnostus (3rd figure) which has a highly modified antenna and lives with ants. |
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Ptininae: Gibbium, Gnostus, Mezium, Niptinus, Niptus, Pitnus, Ptinus, Trigonogenius... |
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Gnostus |
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