The major Thinking Kinds are all mammals, and belong to the same taxonomic order, the lesuniae. These are not primates; indeed, the most typical non-intelligent lesunia is the seal (Ver. nuča). There are no monkeys or apes on Almea; the closest lesuniae to the Thinking Kinds are the šipomi or sea-monkey, which lives in and on coral reefs.
The intelligent species are found in three families:
- Lutinids, consisting of the sea-dwelling iliu and the (non-sentient) šipomi.
- Tritonids, consisting of ktuvoks (who live in swamps and hunt in the sea) as well as several sharklike predators.
- Hominids, the only one of these families to consist of exclusive land-dwellers and to have no surviving non-sentient members. It consists of several species:
- Uestî or humans, whose appearance and character are close to terrestrial humans.
- Flaids, taller, with large flat heads, restricted to the Flora archipelago.
- Elcari, who are well adapted to life in the mountains, and are the chief miners of Almea.
- Múrtani, a less attractive offshoot of the elcari.
- Icëlani, smaller than humans and restricted largely to forests, of extremely primitive language and technology.
Recent studies of Arcél have revealed the existence of rifters, a strange species which can be described as intermittently sentient. They are not lesuniae but felines, most closely related to the arkoša or tree cat.