Phloeonomus

Heer, 1839

Protea Rove Beetles

Species Guides

Phloeonomus is a of ocellate rove beetles in the Staphylinidae, Omaliinae, containing approximately eight described . Species within this genus are obligate saproxylic beetles associated with decaying wood and polypore fungi. The larval stages have been characterized for at least one species (P. punctipennis), showing three instars with morphological differences in antennal, leg, and urogomphal proportions between early and late instars.

Pronunciation

How to pronounce Phloeonomus: /ˌflɪˈɒnəməs/

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Identification

possess ocelli, placing them among the ocellate rove beetles. Larvae of the can be distinguished by diagnostic chaetotaxic characters, with the mature larva of P. punctipennis showing applicability of the Aleocharinae chaetotaxy system to Omaliinae. Specific adult diagnostic features for the genus versus other Omaliini are not detailed in available sources.

Habitat

Decaying wood in forest ; specifically associated with polypore fungi including Ganoderma applanatum and Fomitopsis pinicola, and birch wood (Betula spp.).

Distribution

Records from Denmark (DK), Norway (NO), and Sweden (SE); additional distribution details for individual documented in primary literature but not fully extracted in available sources.

Diet

Mycophagous; associated with polypore fungi in decaying wood.

Host Associations

Ganoderma applanatum - associated withpolypore fungus in decaying wood
Fomitopsis pinicola - associated withpolypore fungus in decaying wood
Betula spp. - associated withbirch wood substrate

Life Cycle

Three larval instars (L1, L2, L3). Morphological differences between early (L1) and late (L2-3) instars involve proportional length of antennal and leg segments, and length ratios of urogomphi to their subapical setae.

Behavior

Obligate saproxylic dependent on decaying wood .

Ecological Role

Member of saproxylic in forest ; contributes to decomposition processes through associations with wood-decaying fungi.

Similar Taxa

DalotiaLarval chaetotaxy compared in morphological studies; Aleocharinae chaetotaxy system applied to Phloeonomus (Omaliinae) based on similarities.

More Details

Species Diversity

Eight described : P. flavipennis (Maklin, 1853), P. laesicollis (Maklin, 1852), P. minimus (Erichson, 1839), P. pedicularius (Erichson, 1840), P. punctipennis Thomson, 1867, P. pusillus (Gravenhorst, 1806), P. sjobergi Strand, 1937, and P. suffusus (Casey, 1894).

Larval Systematics

First diagnostic larval characters for the proposed based on P. punctipennis; chaetotaxy system developed for Aleocharinae successfully applied to this Omaliinae genus, suggesting broader applicability across the .