Calliostomatidae
| Calliostomatidae | ||||||||||
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| Calliostomatidae | ||||||||||
| Thiele , 1924 |
The Calliostomatidae are a family of ocean-dwelling, small to medium-sized herbivorous snails with around 250 species.
features
The right-hand winding shells of the Calliostomatidae have a more or less top-shaped shape , like those of the top snails (Trochidae). Characteristic of the Calliostomatidae are the oblique angle at which the Columella meets the lower edge of the case mouth, as well as the honeycomb patterned protoconch . Most species do not have an open umbilicus. The apex is usually pointed and straight on the sides. The whorls increase quite sharply, giving the bowl a concave outline.
The foot of the Calliostomatidae, which is rounded at the front and pointed at the back, is usually heavily pigmented and covered with papillae. The head has a pair of long, thin antennae. The radula has a characteristic rachis tooth with a finely sawn cusp and also finely sawn lateral cusps.
Distribution and way of life
The Calliostomatidae can be found worldwide in cold to warm seas at both shallow and great depths. They feed on algae and detritus .
Systematics
The species of the Calliostomatidae were counted in traditional systematics to the gyroscopic snails (Trochidae). Johannes Thiele set them up as a separate subfamily Calliostomatinae within the Trochidae. According to this, they belonged to the adult snails (Archaeogastropoda), an order of the front gill snails (Prosobranchia).
Bouchet and Rocroi (2005) place the Calliostomatidae as a separate family to the Vetigastropoda , a superordinate order in the subclass Orthogastropoda . The family includes two subfamilies and a total of 31 genera:
Calliostomatinae Thiele, 1924 (1847):
- Akoya Got, 1961
- Alertalex Dell, 1956
- Astele Swainson, 1855
- Astelena Iredale, 1924
- Bathy author Marshall, 1995
- Calliostoma Swainson, 1840 - type genus
- Carinator Ikebe, 1942
- Dactylastele Marshall, 1995
- Dymares Schwengel, 1942
- Eucasta Dall, 1889
- Falsimargarita Powell, 1951
- Author Iredale, 1924
- Fautrix Marshall, 1995
- Fluxina Dall, 1881
- Laeti author Iredale, 1929
- Leiotrochus Conrad, 1862
- Maurea Oliver, 1926
- Neocalliostoma Castellanos & Fernandez, 1976
- Otukaia Ikebe, 1942
- Photinastoma Powell, 1951
- Photinula Adams, 1854
- Selastele Marshall, 1995
- Sinutor Cotton & Godfrey, 1935
- Tropidotrochus Parodiz, 1977
- Venustas Allan, 1926
- Ziziphinus Gray, 1842
Thysanodontinae Marshall, 1988:
- Carinastele Marshall, 1988
- Herbertina Marshall, 1988
- Thysanodonta Marshall, 1988
Without assignment to a subfamily:
- Margarella Thiele, 1893
- Venustatrochus Powell , 1951
literature
- John W. Tunnell, Jean Andrews, Noe C Barrera, Fabio Moretzsohn: Encyclopedia of Texas Seashells: Identification, Ecology, Distribution, and History . Texas A&M University Press, College Station (Texas) 2010. 512 S. Calliostomatidae : p. 116.
- Philippe Bouchet & Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005 ISSN 0076-2997
- CS Hickman, JH McLean (1990): Systematic revision and supAGENeric classification of Trochacean gastropods . Natural History Museum of Los Angeles County, Science Series 35, pp. 1-169.
