Le conoscenze sulla nicchia trofica dei Trogossitidi, a parte i pochissimi di interesse economico, sono quanto di più vago.
Ti trascrivo la chiave alle sottofamiglie di Jiří Kolibáč (2023) Trogossitidae: A review of the beetle family, with a catalogue and keys. ZooKeys 366: 1–194 , dove si accenna alle preferenze di menu'
1 Adult: labium with rigid ligula; epipharynx mostly with cordate sclerite along
apex of labrum; antennal club mostly conspicuously asymmetrical, termi-
nal antennomeres (antennal club) mostly with sensorial fields; front coxal
cavities externally closed; body cylindrical or oval but not conglobate; end
of elytral suture with distinct interlocking mechanism (“elytral lock”). Larva:
head capsule with distinct endocarina, gular sutures and hypostomal rods;
frontal arms mostly straight; gular region mostly with paragular scler-
ites. Mainly predatory, rarely fungivorous or phytophagous (e.g. feeding on
grains). .....................................................................................Trogossitinae
–
Adult: labium with membranous ligula; epipharynx without cordate scler-
ite; antennal club weakly asymmetrical or symmetrical, terminal anten-
nomeres (antennal club) without distinct sensorial fields; front coxal cavi-
ties mostly externally open (except for Lophocaterinae: Decamerini); body
often oval and flat (but sometimes also convex or conglobate); elytral suture
without distinct interlocking mechanism. Larva: head capsule mostly with-
out endocarina; gular sutures and hypostomal rods reduced; frontal arms
often curved; gular region without paragular sclerites..............................2
2 Adult: frontoclypeal suture absent or inconspicuous; gular sutures wide,
subparallel; eyes moderate, not distinctly elevate; antennal club symmetrical;
radial cell oblong, moderate; tibial spines along sides mostly reduced; body
flat, convex or conglobate. Larva: lacinia mandibulae tridentate, absent or
minute. Fungivorous or phytophagous...........................................Peltinae
–
Adult: frontoclypeal suture present, sometimes distinctly emarginate (or
concave); gular sutures wide, convergent at apex; eyes almost elevate, laterally
situated; antennal club weakly asymmetrical; radial cell moved downwards,
towards wing centre, sometimes small or reduced; tibial spines along sides pre-
sent; body always flat. Larva: lacinia mandibulae plumose, always distinct.
Primitive members fungivorous or phytophagous, advanced ones floricolous
or predatory. .......................................................................... Lophocaterinae
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A.