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Genus Thalassa

Montezuma Lady Beetle - Thalassa montezumae - female Thalassa montezumae Mulsant - Thalassa montezumae - male Large Ladybird Beetle - Thalassa montezumae - male Chilocorus? - Thalassa montezumae Mealybug destroyer - Thalassa montezumae Thalassa montezumae Mulsant - Thalassa montezumae Which Twice Stabbed? - Thalassa montezumae Thalassa montezumae Mulsant - Thalassa montezumae - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Coccinelloidea
No Taxon (Coccinellid group)
Family Coccinellidae (Lady Beetles)
Subfamily Scymninae
Tribe Hyperaspidini (Helesius, Hyperaspidius, Hyperaspis, and Thalassa)
Genus Thalassa
Synonyms and other taxonomic changes
First described in 1850 by Étienne Mulsant
Explanation of Names
Author: Mulsant, 1850

Thalassa (Θαλασσα) is Greek for "Sea". Mulsant said it was a "nom mythologique" ("mythological name"), so he must have been referring to the sea goddess Thalassa
5 species, with 1 in North America
All species are metallic blue or green, some with orange or yellow spots.
Southwestern U.S. to South America.
Internet References
Species des coléoptères trimères sécuripalpes, p.511    Mulsant's original description of the genus (in French)