| Spelaeodiscus triarius | |
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| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| (unranked): | clade Heterobranchia clade Euthyneura ContentsOrthurethra |
| Superfamily: | |
| Family: | |
| Genus: | |
| Species: | S. tatricus |
| Binomial name | |
| Spelaeodiscus triarius (Rossmässler, 1839) | |
Spelaeodiscus triarius is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Spelaeodiscidae.
Megalagrion is a genus of damselflies in the family Coenagrionidae It contains approximately 26 species, all of which are endemic to Hawaiʻi.
This article is a list of biological species, subspecies, and evolutionary significant units that are known to have become extinct during the Holocene, the current geologic epoch, ordered by their known or approximate date of disappearance from oldest to most recent.
Spelaeodiscus is a genus of very small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Spelaeodiscidae.
Stygobromus is a genus of amphipod crustaceans that live in subterranean habitats. As well as a large number of species in North America, a smaller number of species are also known from Eurasia. Most of the North American species live in areas which were not covered by the Laurentide Ice Sheet, although a few species seem to have survived under the ice. A number of species are on the IUCN Red List as endangered species (EN) or vulnerable species (VU); all the listed species are endemic to the United States. One species, S. lucifugus, is extinct. Stygobromus includes the following species:
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