Pachyoliva

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Pachyoliva
Olivella columellaris crawling; scale bar, 1 cm.jpg
Olivella columellaris crawling, scale bar: 1 cm. Arrowhead highlights lateral propodial appendage. From [1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
clade Hypsogastropoda
clade Neogastropoda
Superfamily:
Olivoidea
Family:
Olividae
Subfamily:
Olivellinae
Genus:
Olivella
Subgenus:
Pachyoliva

Olsson, 1956 [2]

Pachyoliva is a subgenus of small sea snails, marine gastropod mollusks in the genus Olivella , the dwarf olives, within the family Olividae, the olives. Species in this subgenus inhabit soft sediments in the intertidal (or eulittoral) and subtidal (or sublittoral) zones of sandy beaches of the Panamic faunal province, that is, the west coast of the Americas from Baja California to north Peru.

Contents

Species

Species within this subgenus are:

Life habits and ecology

The pachyolivas are of zoological interest for at least three reasons. First, on many beaches in their range, they are by far the most abundant macrofaunal element (= animal large enough to be easily seen), [2] [3] and therefore play a key role in the food web of their habitat. Second, they have evolved a unique way of filter feeding not found in any other snail, which enables them to exploit detritus floating in the backwash as a food source. [1] Third, they utilize swash waves for locomotion by using their expanded foot as an underwater sail, a way of moving known as swash-surfing. [4]

Related Research Articles

<span class="mw-page-title-main">Olive snail</span> Family of molluscs

Olive snails, also known as olive shells and olives, scientific name Olividae, are a taxonomic family of medium to large predatory sea snails with smooth, shiny, elongated oval-shaped shells.

Cardita is a genus of marine bivalve molluscs in the family Carditidae.

<span class="mw-page-title-main">Olivellinae</span> Subfamily of gastropods

Olivellinae, are a subfamily of small predatory sea snails with smooth, shiny, elongated oval-shaped shells, in the family Olividae. The shells sometimes show muted but attractive colors, and may have some patterning.

<i>Olivella</i> (gastropod) Genus of gastropods

Olivella, common name the dwarf olives, is a genus of small predatory sea snails, marine gastropod molluscs in the subfamily Olivellinae of the family Olividae, the olives. Olivella is the type genus of the family.

Olivella acteocina is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella bitleri is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella broggi is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella cocosensis is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

<i>Olivella columellaris</i> Species of gastropod

Olivella columellaris is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives. With the very similar Olivella semistriata it forms the subgenus Pachyoliva. Both species are suspension feeders. They use unique appendages of the propodium to deploy mucus nets which capture suspended particles from the backwash on sandy beaches of the tropical eastern Pacific.

Olivella drangai is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella macgintyi is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella morrisoni is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella perplexa is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella peterseni is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

<i>Olivella semistriata</i> Species of gastropod

Olivella semistriata is a species of small sea snail, a marine gastropod mollusk in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives With the very similar Olivella columellaris it forms the subgenus Pachyoliva. Both species are suspension feeders. They use unique appendages of the propodium to deploy mucus nets which capture suspended particles from the backwash on sandy beaches of the tropical eastern Pacific. Olivella semistriata is a swash-surfer; the snails use their expanded foot as an underwater sail to follow the tidal movement of the backwash zone in which they feed.

Olivella stegeri is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

Olivella thompsoni is a species of small sea snail, marine gastropod mollusk in the subfamily Olivellinae, in the family Olividae, the olives. Species in the genus Olivella are commonly called dwarf olives.

<i>Carditamera</i> Genus of bivalves

Carditamera is a genus of molluscs in the family Carditidae.

Emerita rathbunae is a species of "mole crabs" or "sand crabs" in the genus Emerita that lives along the tropical Pacific coasts of the Americas.

<span class="mw-page-title-main">Pomacea columellaris</span> Species of snail

Pomacea columellaris is a South American species of freshwater snail in the apple snail family, Ampullariidae.

References

  1. 1 2 Troost, Alison I.; Rupert, Samantha D.; Cyrus, Ariel Z.; Paladino, Frank V.; Dattilo, Benjamin F.; Peters, Winfried S. (June 2012). "What can we learn from confusing Olivella columellaris and O. semistriata (Olivellidae, Gastropoda), two key species in panamic sandy beach ecosystems?". Biota Neotropica. 12 (2): 101–113. doi: 10.1590/S1676-06032012000200011 .
  2. 1 2 Olsson A. A. (1956) Studies on the genus Olivella. Proceedings of the Academy of Natural Sciences of Philadelphia 108: 155-225
  3. ↑ Olsson A. A. (1923/24) Notes on marine molluscs from Peru and Ecuador. Nautilus 37:120-130
  4. ↑ Vanagt, Thomas; Vincx, Magda; Degraer, Steven (July 2008). "Can sandy beach molluscs show an endogenously controlled circatidal migrating behaviour? Hints from a swash rig experiment" (PDF). Marine Ecology. 29 (Suppl. 1): 118–125. doi:10.1111/j.1439-0485.2008.00221.x.
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