Orthonychiidae
Encyclopedia
Orthonychiidae is an extinct taxonomic family
of marine
, gastropod mollusks.
There is an unusually great variability
between the shells of species in the genus Orthonychia, but an analysis of this variability has not been done yet (2008).
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
of marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
, gastropod mollusks.
There is an unusually great variability
Variability
The term variability, "the state or characteristic of being variable", describes how spread out or closely clustered a set of data is. This may be applied to many different subjects:*Climate variability...
between the shells of species in the genus Orthonychia, but an analysis of this variability has not been done yet (2008).
Genera
Genus Orthonychia Hall, 1843- Orthonychia acuta Roemer, 1856
- Orthonychia baldwini Rohr et al., 1981
- Orthonychia belli Clarke, 1908
- Orthonychia bowsheri Yochelson, 1956
- Orthonychia chesterense Meek & Worthen, 1866
- Orthonychia concavum Hall, 1860
- Orthonychia conicum Hall, 1860
- Orthonychia conoidea (Goldfuss, 1844)
- Orthonychia cornuforme (Winchell, 1863)
- Orthonychia costata (Barrois, 1889)
- Orthonychia daschi (Rohr & Smith, 1978)
- Orthonychia dentalium Hall, 1862
- Orthonychia enorme (Lindström, 1884)
- Orthonychia infabricatus Hyde, 1953
- Orthonychia marblecreekensis Talent & Philip, 1956
- Orthonychia obliquesulata Spitz, 1907
- Orthonychia pajerensis Chronic, 1949
- Orthonychia parva (Shumard & Swallow, 1858)
- Orthonychia parvulum Whiteaves, 1892
- Orthonychia pentalvea Talent & Philip, 1956
- Orthonychia perplexum (Hall, 1879)
- Orthonychia prosseri Clarke & Swartz, 1913
- Orthonychia protei (Oehlert, 1883)
- Orthonychia puellaris (Whidborne, 1891)
- Orthonychia quadrangularis (Whidborne, 1891)
- Orthonychia rostratus (Trenkner, 1867)
- Orthonychia sciotoensis Hyde, 1953
- Orthonychia sileni (Oehlert, 1883)
- Orthonychia subrectum Hall, 1860 - type species
- Orthonychia talon Tolmachoff, 1930
- Orthonychia tortuosa (Hall, 1860)
- Orthonychia trirotundolobatum (Talent & Philip, 1956)
- Orthonychia unguiculata Clarke & Swartz, 1913
- Orthonychia variablis Tyler, 1965
- Orthonychia vishtytica Saladzius, 1966
- Orthonychia vomerium (Winchell, 1863)
- Orthonychia waverlyensis Hyde, 1953
- Orthonychia compressa / Platyceras (Orthonychia) compressum Girty 1910
- Orthonychia ungula / Platyceras (Orthonychia) ungula (Weller, 1906)