Carinopelta
Introduction '''''Carinopelta''''' is a genus within Carinopeltidae, an extinct family of Cambrian molluscs of uncertain position. It is in the superfamily Scenelloidea.
Taxonomy The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Igarkiellidae in the superfamilia Scenelloidea within the Paleozoic molluscs of uncertain systematic position. This family has no subfamilies. According to P. Yu. Parkhaev in 2007, the family is within the superfamily Helcionelloidea Wenz, 1938 in the order Helcionelliformes Golikov & Starobogatov, 1975 within the subclass Archaeobranchia Parkhaev, 2001 in the class Helcionelloida Peel, 1991. ''Carinopelta'' is one of six genera which was placed into the family, along with ''Protoconus'', ''Rozanoviella'', ''Gonamella'', ''Mastakhella'', and ''Squamiconus'' by P. Yu. Parkhaev in 2002.
Homonymy The type species was first described by N.I. Vassiljeva as ''"Trilobella" levis'' in 1990.The genus name was already preoccupied by ''"Trilobella"'' Woodward, 1924, itself a synonym of ''Triloba'' Vest, 1867 making ''Trilobella'' Vassiljeva a homonym. In 1998 a new genus, ''Igarkiella'' was erected for the species to correct the homonym status and in 2001 a new family '''Igarkiellidae''' was named for the genus. However the chosen genus name was again a homonym, already having been used by A.V. Rozova for the trilobite ''Igarkiella''. In 2013 a new genus and family name were erected by Parkhaev to fully remove the homonym status of the species. Due to the family name Igarkiellidae being based on the invalid genus name, it too was invalid for use and the replacement family name Carinopeltidae was given.
Etymology Parkhaev coined the genus name ''Carinopelta'' as a combination of the Latin word ''carina'' meaning "keel" and ''pelta'' a type of oval shield used in Thrace.
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