Reticunassa
A genus of marine gastropod mollusks in the family Nassariidae.
Reticunassa is a genus of sea snails, specifically marine gastropod mollusks that belong to the Nassariidae family—the group known as Nassa mud snails or dog whelks. The genus was brought back into use in 2017 after a study of the *Nassarius pauperus* species complex. It contains a mix of currently living and fossil species, spread across different marine habitats. The species list includes *Reticunassa annabolteae*, *Reticunassa aureolineata*, *Reticunassa cockburnensis*, *Reticunassa compacta*, *Reticunassa crenulicostata*, *Reticunassa dermestina*, *Reticunassa erythraea*, *Reticunassa fratercula*, *Reticunassa fuscofasciata*, *Reticunassa goliath*, *Reticunassa goudi*, *Reticunassa hanraveni*, *Reticunassa hiradoensis*, *Reticunassa hugokooli*, *Reticunassa intrudens*, *Reticunassa jeanmartini*, *Reticunassa luteola*, *Reticunassa microstoma*, *Reticunassa microstriata*, *Reticunassa myanmarensis*, *Reticunassa neoproducta*, *Reticunassa paupera*, *Reticunassa pertusa*, *Reticunassa pilata*, *Reticunassa plebecula*, *Reticunassa poppeorum*, *Reticunassa rotunda*, *Reticunassa silvardi*, *Reticunassa simoni*, *Reticunassa taggartorum*, *Reticunassa tanager*, *Reticunassa thailandensis*, *Reticunassa tringa*, *Reticunassa visayaensis*, and *Reticunassa zanzibarensis*. One species, *Reticunassa balteata*, is listed as a taxon inquirendum (a name of uncertain status). Several other species have been moved into synonymy, including *Reticunassa acutidentata*, *Reticunassa chibi*, *Reticunassa dipsacoides*, *Reticunassa festiva*, *Reticunassa flindersi*, *Reticunassa fratercula*, *Reticunassa fraterculus*, *Reticunassa fuscolineata*, *Reticunassa hongoensis*, *Reticunassa japonica*, *Reticunassa mobilis*, *Reticunassa praematurata*, *Reticunassa simizui*, *Reticunassa spurca*, *Reticunassa subcopiosa*, *Reticunassa tatei*, and *Reticunassa verconis*, which are now considered synonyms of other species in the genera *Nassarius* or *Tritia*.
Quick Facts
- Taxon
- Reticunassa
- Type Species
- Nassa paupera
- Type Species Authority
- Gould, 1850
Facts from the source article.
Lore & Background
The genus Reticunassa was originally described by Iredale in 1936 in Australian molluscan notes. It was later reinstated in 2017 by Galindo, Kool & Dekker as part of a review of the Nassarius pauperus complex, which resulted in the description of six new species. The genus includes both living and fossil species, with fossil taxa such as Reticunassa pertusa and Reticunassa subcopiosa known from deposits.
Species within Reticunassa exhibit a range of morphological variation, with many originally described under other genera such as Nassarius. The genus has been subject to taxonomic revision, with several species moved into synonymy, including Reticunassa acutidentata and Reticunassa festiva, which are now considered synonyms of other nassariid species. The genus continues to be studied, with new species described as recently as 2022 by Zhang, Zhang & Lee, and by Kool in 2021 and 2022.
Geographic distribution of Reticunassa species spans from the Indian Ocean (e.g., Reticunassa zanzibarensis) to the Pacific (e.g., Reticunassa hiradoensis from Japan, Reticunassa thailandensis from Thailand). Some species, such as Reticunassa cockburnensis and Reticunassa silvardi, were described from Australian waters. The genus also includes taxa of uncertain status, such as Reticunassa balteata, listed as a taxon inquirendum.
Reader's Guide
The reinstatement of Reticunassa in 2017 marked a significant taxonomic clarification within the Nassariidae, resolving long-standing confusion around the Nassarius pauperus complex. This revision, published in the European Journal of Taxonomy, provided a framework for understanding the diversity of these small to medium-sized mud snails. The genus now serves as a repository for species that share morphological and molecular characteristics distinct from other nassariid genera.
Reticunassa's legacy is tied to its role in clarifying nassariid phylogeny, as demonstrated by molecular phylogenetic studies published in 2016 that revisited the family's systematics. The genus includes both common and rare species, with some like Reticunassa paupera having been described as early as 1850 by Gould. The ongoing description of new species—such as Reticunassa aureolineata and Reticunassa fuscofasciata in 2022—indicates that the genus remains an active area of malacological research.
The genus also preserves a fossil record, with species like Reticunassa pertusa from the Tertiary of Australia and Reticunassa hongoensis from Japan, providing insights into the evolutionary history of the group. The synonymy of several former Reticunassa species under Nassarius or Tritia reflects the dynamic nature of nassariid taxonomy, where molecular and morphological data continue to refine generic boundaries.
Did You Know?
- Reticunassa was reinstated as a genus in 2017 after a review of the Nassarius pauperus complex.
- The genus includes both living species and fossil taxa such as Reticunassa pertusa.
- Several species originally placed in Reticunassa have been moved to synonymy under Nassarius or Tritia.
- New species of Reticunassa were described as recently as 2022 by Zhang, Zhang & Lee.
More in Marine Snails: Ceriths, Nassas and Conchs 1-24
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