Crepidula ustulatulina is a species of small sea snail, a slipper snail, a marine gastropod mollusk in the family Calyptraeidae, the slipper snails or slipper limpets, cup-and-saucer snails, and Chinese hat snails.[2]
| Crepidula ustulatulina | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Calyptraeidae |
| Genus: | Crepidula |
| Species: | C. ustulatulina
|
| Binomial name | |
| Crepidula ustulatulina Collin, 2002[1]
| |
| Synonyms | |
|
Little Speckled Slipper Snail | |
This species occurs in the Western Atlantic Ocean.
Distribution edit
This recently named species is known to occur in the Gulf of Mexico and the east coast of Florida.
Description edit
Crepidula ustulatulina can be distinguished from other species of Crepidula by the following suite of characters. The shell is small (usually less than 1.5 cm), smooth, and convex. It is often cream with distinct chestnut brown spots or streaks, sometimes it is brown overall with darker spots or streaks. The internal septum is flat and white, and the animal's left side usually extends somewhat farther forward than does the right side. The margin is straight or slightly bowed. There is an oval muscle scar just anterior to the shelf on the animal's right side. The small apex is usually directly posterior and is slightly rostrate in animals living on small snails but not in those from flat substrates. The external body color is light to dark gray with opaque white or cream on the tips of the tentacles and the lips. There are usually large yellow pigment splotches on the mantle, neck and sometimes foot, visible only in life.[3][4]
The maximum recorded shell length is 13.2 mm.[5] The shell is usually cream with brown mottling. The visible soft parts are mostly grey.
Habitat edit
Crepidula ustulatulina is common in the low intertidal and shallow subtidal, often on dead clam shells and on columbellids and cerithids in or near sea grass. Those living on large flat substrates are oval in shape but those on small snails have highly arched and often compressed on the left side.[3][4] Minimum recorded depth is 0 m.[5] Maximum recorded depth is 1 m.[5]
Development edit
The large eggs (300-340 µm) produce direct developing embryos with a smooth shell, and an average length of 744 µm at hatching. The large embryonic velum is not absorbed prior to hatching and the embryo hatches as a swimming pediveliger. The non-feeding larvae settle within an hour of hatching. There are between 3 and 16 eggs in each capsule and the number of eggs per capsule increases with female size.[3][4]
References edit
- ^ Collin. 2002. Bulletin of Marine Science 70(1): 177-184. World Register of Marine Species, Retrieved 2010-06-02.
- ^ Crepidula ustulatulina Collin, 2002. WoRMS (2009). Crepidula ustulatulina Collin, 2002. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=387736 on 2010-06-03 .
- ^ a b c Collin, Rachel (2001). "The effects of mode of development on phylogoegraphy and population structure of North Atlantic Crepidula (Gastropoda: Calyptraeidae)". Molecular Ecology. 10 (9): 2249–2262. doi:10.1046/j.1365-294X.2001.01372.x. PMID 11555267. S2CID 38276489.
- ^ a b c Collin, Rachel (2002). "Another last word on Crepidula convexa and a description of C. ustulatulina sp. nov. (Gastropoda: Calyptraeidae) from the Gulf of Mexico". Bulletin of Marine Science. 70: 177–184.
- ^ a b c Welch, J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence"". PLoS ONE. 5 (1): e8776. Bibcode:2010PLoSO...5.8776W. doi:10.1371/journal.pone.0008776. PMC 2808249. PMID 20098740.
- Say, T. 1822. An account of the marine shells of the United States. J. Acad. Nat. Sci. Philadelphia 2: 221–227.
External links edit
- Info from the Smithsonian Marine Station at Fort Pierce website, a detailed report by the author of the species, R. Collin of the Smithsonian Tropical Research Institute
- Malacolog info on this species
- http://stri.si.edu/sites/collinlab/tree_species/details.php?id=2
- C. ustulatulina in the Indian River Lagoon BioInventory