Thema Subject Categories 1.3

Previous versions of Thema are still available 1.2 1.1 1.0.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

See the search hints below.

Notation Category heading Add Mod ?
P Mathematics & Science
PS Biology, life sciences
Use for: (all PS* codes) academic, specialist and professional level works. Prefer WN* codes for natural history etc for the general reader. See also: WN* Nature & the natural world: general interest and its subcategories
PSV Zoology & animal sciences
See also: WNC Wildlife: general interest
PSVA Zoology: invertebrates
Class here: annelids (worms), myriapoda, echinoderms (starfish, sea urchins), jellyfish. See also: WNCN Wildlife: butterflies, other insects & spiders: general interest
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PSVA2 Insects (entomology)
Class here: caterpillars, butterflies & moths
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PSVA4 Crustaceans (carcinology)
Class here: crabs, lobsters, crayfish, shrimp, krill, woodlice, barnacles etc
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PSVA6 Molluscs (malacology)
Class here: cephalopod, octopus, squid, gastropods, snails, slugs, bivalves, clams, oysters, cockles, mussels, scallops etc
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PSVA8 Arachnids (arachnology)
Class here: spiders, scorpions, ticks, mites etc
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