Paederina

Larvae of Paederina can be distinguished from other Paederinae subtribes by specific morphological characters including chaetotaxy patterns and body proportions; an identification key for larvae exists at the subtribe level. Adults of some genera (e.g., Paederus) exhibit distinctive color patterns with dark blue or black markings contrasting against reddish-brown body segments. Micropterous species have completely reduced hind wings. Male genitalia analysis is often required for species-level identification, particularly in genera such as Pseudomedon where external morphology is highly similar among congeners.

Moist microhabitats including wet margins of water bodies, river banks, lake shores, oxbows, peat bogs, and floodplain forests. Found under rotting plant remains, in flushes, among mosses, and in leaf litter. Wintering sites include reed litter and piles of straw. Montane species occupy elevations of 1480–3000 m in shrub habitats, mixed and coniferous forests, and areas with loose gravel and grass roots.

Palaearctic region from the Iberian Peninsula to Kazakhstan; additional records from Afrotropical, Australasian, Nearctic, and Oriental regions. In China, documented from southern Xizang, eastern Chongqing, Hubei Province, and Zhejiang Province. One species known only from westernmost Yunnan Province near the Myanmar border. GBIF records indicate presence in Parque Nacional Natural Serranía de Chiribiquete, Colombia.

Adults and larvae have been reared from March to June at 20±3°C under laboratory conditions. Specimens collected in the field in June.

Mites and Collembola of various species (based on laboratory rearing of Pseudomedon obsoletus larvae; not confirmed from field observations).

Two larval instars observed (L1 and L2). Rearing period documented as March to June at 20±3°C.

Some species are micropterous (flightless) with reduced or completely absent hind wings, restricting dispersal. Rarely encountered in Europe, usually caught singly; greater numbers found only at wintering sites. Some populations regarded as distinctly declining in parts of Europe. Specimens have been observed moving under fresh grass along river sides.

• Paederinae (other subtribes)Larvae distinguished by subtribe-specific morphological characters including chaetotaxy and body proportions; identification key available for Paederinae larvae.

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life
• Six new species of micropterous Paederus (Coleoptera, Staphylinidae, Paederinae) from China.
• The third species of the genus Pachypaederus Fagel, 1958 (Coleoptera, Staphylinidae, Paederinae) from the Oriental region.
• Synthesis of Current Knowledge of the Morphology of the Larval Stages of Paederinae (Coleoptera; Staphylinidae), with a First Insight into the Mature Larva of Pseudomedon Mulsant & Rey, 1878, in the Light of a New Systematic Division.