Androniscus

Small body size (around 6 mm), pink to orange coloration with a yellow midline stripe that bifurcates toward the posterior. Large eyes relative to body size and granular exoskeleton texture. Distinguished from other small trichoniscid woodlice by the combination of bright coloration and distinct dorsal stripe pattern.

Calcareous environments with significant lime availability. In northern parts of the range: coastal areas, gardens, old quarries, caves, and churchyards. In southern parts: primarily cave-dwelling (troglobitic), with some populations considered troglophilic. In North America, restricted to greenhouse environments.

British Isles through southern Europe to North Africa. Records from Denmark, Norway, and Sweden. Introduced to North America (greenhouses only).

Shows habitat partitioning in cave systems, with genetically isolated populations between caves due to lack of migration. In the British Isles, has been observed to prefer Anglican churchyards over Catholic ones, reportedly due to older Protestant churches using ox-blood mortar.

Decomposer in calcareous habitats. Serves as an indicator species for lime-rich environments.

Used as an indicator of calcareous substrates and historical building materials. Subject of biogeographic and genetic studies due to cave-isolated populations. Occasional greenhouse pest in North America.

• TrichoniscusSimilar small size and family (Trichoniscidae), but Androniscus distinguished by pink/orange coloration with yellow dorsal stripe and larger relative eye size
• HaplophthalmusAnother small trichoniscid genus; Androniscus differs in coloration pattern and granular exoskeleton texture

• woodlouse
• terrestrial isopod
• Trichoniscidae
• cave-dwelling
• calcareous habitats

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life