Erronea

Lore & Background

The genus Erronea was established within the family Cypraeidae, encompassing a range of cowrie species. The taxonomic history of the genus includes numerous species that have been reassigned to other genera over time. For instance, Erronea angustata, Erronea chinensis, and Erronea hungerfordi are now placed in Notocypraea, Ovatipsa, and Paradusta respectively. Other species such as Erronea bregeriana and Erronea walkeri have been moved to Contradusta. The genus also contains species like Erronea onyx, which has a synonym in Erronea succincta, and Erronea japonica, now considered a synonym of Purpuradusta gracilis notata. The species Erronea adusta, Erronea caurica, and Erronea errones were described by Linnaeus or Lamarck in the 18th and early 19th centuries, while more recent additions include Erronea garyi described in 2019. The genus is represented by a variety of shell forms and patterns, as seen in the illustration of Erronea onyx.

Reader's Guide

The genus Erronea holds significance within the study of cowries due to its taxonomic complexity and the number of species that have been reclassified. The list of accepted species includes 17 names, but the synonymy list is extensive, with 15 former species now assigned to other genera such as Notocypraea, Paradusta, Contradusta, Ovatipsa, Purpuradusta, Austrasiatica, Melicerona, Ficadusta, and Nesiocypraea. This reflects ongoing revisions in cowrie classification. The earliest described species date to the 18th century, with Linnaeus and Lamarck contributing several names. The most recent addition, Erronea garyi, was described in 2019. The genus is documented in works by Troschel, Jousseaume, Iredale, and others, which have contributed to the understanding of its morphology and distribution. The presence of species like Erronea onyx, illustrated with a specimen measuring 37 mm, indicates the range of sizes within the genus. The legacy of Erronea lies in its role as a taxonomic repository for many cowrie species that have since been moved, highlighting the dynamic nature of molluscan systematics.

Did You Know?

• Erronea is a genus of sea snails in the family Cypraeidae, the cowries.
• The species Erronea onyx has a synonym: Erronea succincta (Linnaeus, 1758).
• Erronea garyi was described as recently as 2019.
• Fifteen species once placed in Erronea have been moved to other genera.