Euthema | |
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Holotype specimen of Euthema hesoana | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Architaenioglossa |
Superfamily: | Cyclophoroidea |
Family: | Diplommatinidae |
Genus: | † Euthema Yu, Wang & Pan, 2018 [1] |
Species | |
See text | |
Synonyms | |
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Euthema is a fossil genus of minute land snails with an operculum, terrestrial gastropod molluscs in the family Diplommatinidae from the Cretaceous Burmese and Hkamti ambers.
As of 2021, 8 species are placed into Euthema: [2]
Euthema truncatellina is named after the extant genus Truncatellina (Stylommatophora), which has a similar shell, acknowledging the convergence in the different lineages of gastropods on land. [3]
Euthema annae has a shell which is almost cylindrical with 6 weakly convex whorls, ribbed, with strong constriction. Aperture almost heart-shaped with parietal inclusion. Umbilicus narrow. Periumbilical keel weak. Height of shell 2 mm (0.079 in) tall and 1–1.1 mm (0.039–0.043 in) wide. [3] [2]
E. myanmarica has a shell which is almost cylindrical, comprising 6 moderately convex whorls, ribbed, with weak constriction. The aperture is oval and the umbilicus wide, with a strong periumbilical keel. The shells are 2 mm (0.079 in) and 0.9 mm (0.035 in) wide. [2]
E. truncatellina has a shell which is almost cylindrical, comprising 6.5 moderately convex whorls, ribbed, with weak constriction. The aperture is circular, the umbilicus narrow, and the periumbilical keel is absent. The shells are 1.7 mm (0.067 in) and 0.9 mm (0.035 in) wide. [3] [2]
Spermodea lamellata is a species of minute European land snail, a terrestrial gastropod mollusc, or micromollusc, in the family Valloniidae.
Diplommatinidae is a family of small land snails, also known as staircase snails, with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea. The Cochlostomatinae Kobelt, 1902, were previously considered a subfamily of the Diplommatinidae, but are now known to be a separate family.
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This list 2020 in paleomalacology is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that are scheduled to be described during the year 2020, as well as other significant discoveries and events related to molluscan paleontology that are scheduled to occur in the year 2020.
Burmese amber is fossil resin dating to the early Late Cretaceous Cenomanian age recovered from deposits in the Hukawng Valley of northern Myanmar. It is known for being one of the most diverse Cretaceous age amber paleobiotas, containing rich arthropod fossils, along with uncommon vertebrate fossils and even rare marine inclusions. A mostly complete list of all taxa described up until 2018 can be found in Ross 2018; its supplement Ross 2019b covers most of 2019.
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