Persicula

Persicula is a taxonomic genus of minute to small predatory sea snails, marine gastropod mollusks. It includes several species which are micromollusks.[1]

Persicula
Drawing of a shell of Persicula shepstonensis
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Family: Cystiscidae
Subfamily: Persiculinae
Genus: Persicula
Schumacher, 1817
Type species
Persicula variabilis
Synonyms[1]
  • Pachybathron Gaskoin, 1853
  • Persicula (Rabicea) Gray, 1857

This genus is placed in the family Cystiscidae. It was previously in the family Marginellidae the margin snails. Both families are within the clade Neogastropoda.

(Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.)

Habitat

Species in this genus live from the intertidal zone to 370 m in depth.

Shell description

In this genus the shell is minute to small. It can be uniformly colored or white, and the color can be patterned. The shell is moderately thick to thick. The spire is usually immersed. The lip of the aperture is thickened, and weakly to strongly lirate.

An external varix can be present or absent. There is a distinct siphonal notch present and a posterior notch is also present. The columella is multiplicate, with 4 to 13 plications plus parietal lirae.

Description of soft parts

The animal has long tentacles, and the siphon is also usually long. The mantle appears not to extend completely over the external shell surface.

Species

The separation between the genera Persicula and Gibberula is not well-defined. It is based on morphological differences with the larger species (showing a complex color pattern) belonging to Persicula, while the smaller species (showing a banded or uniform color pattern) belong to Gibberula. Many species with characteristics that fall between the two extremes, are ambiguous. Up to now (2010) there is no phylogenetic analysis to substantiate this rather arbitrary classification.[1]

According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Persicula :[1]

The following species are mentioned in the database gastropods.com :[11]

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gollark: Haskell is better.
gollark: Keyboard phrase suggestions:- "MWAHAHAHAHA! I'll show you! I'll show you all!"- "New esolang idea: "- "Wait, why is this on my keyboard?"
gollark: You should also have buttons on your keyboard which type out phrases which you will never need.
gollark: Yes it is.

References
  1. Persicula Schumacher, 1817. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137882 on 2010-12-05
  2. Faber, M.J. (2006). "The genera Pachybathron and Persicula with the description of a new species of Persicula from French Guyana (Gastropoda: Cystiscidae)". Miscellanea Malacologica. 2 (2): 25–39.
  3. Petuch, E.J. (2002). "New deep water gastropods from the Bimini Shelf, Bimini Chain, Bahamas". Ruthenica. 12 (1): 59–72.
  4. Clover, P.W. (1972). "Two new species of Marginellidae from West Africa". Journal of Conchology. 27: 503–504.
  5. De Jong, K.M.; Coomans, H.E. (1988). "Marine gastropods from Curaçao, Aruba and Bonaire" (PDF). Studies on the fauna of Curaçao and other Caribbean islands. 214: 1–261. Retrieved 5 July 2020.
  6. Lamarck, Jean-Baptiste (1822). Histoire naturelle des animaux sans vertèbres. Tome septième. Paris. pp. 1–711. Retrieved 5 July 2020.
  7. Boyer, F.; Neefs, J.; Wakefield, A. (1999). "A new species of Persicula from the Venezuelan region (Gastropoda: Cystiscidae)". Journal of Conchology. 36 (4): 15–20.
  8. Megerle von Mühlfeld, Johann Carl (1816). "Beschreibung einiger neuen [sic] Conchylien". Gesellschaft der Naturforschenden Freunde zu Berlin Magazin für die neuesten Entdeckungen in der gesammten Naturkunde. 8 (1): 3–11, pls 1-2. Retrieved 5 July 2020.
  9. Cossignani, T. (2001). "Descrizione di dieci nuove marginelle (Gastropoda: Prosobranchia, Marginellidae e Cystiscidae) della provincia Indo-Pacifica". Malacologia Mostra Mondiale. 35: 3–11.
  10. Roth, B.; Petit, R.E. (1972). "A new species of Persicula from the Arabian Sea (Marginellidae)". The Nautilus. 86 (2–4): 80. Retrieved 7 July 2020.
  11. Gastropods.com : family Cystiscidae: accessed : 5 December 2010
  • Cossignani T. (2006). Marginellidae & Cystiscidae of the World. L'Informatore Piceno. 408pp
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