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Iredalea
''Iredalea'' is a small genus of sea snails, marine gastropod mollusks in the family Drilliidae. This genus was named in 1915 by Walter Oliver after Tom Iredale (1880–1972), an English-born naturalist who lived mainly in Australia. Fossil species have been found in Pliocene strata of Italy and in Miocene strata of Indonesia; age range: 5.332 to 2.588 Ma. Description The narrow, solid and turreted shell has a fusiform shape. The protoconch consists of 4 whorls, with a sinusigera apex. The shell is axially sculptured by numerous slender and continuous riblets. The aperture measures about a third of the length of the shell. The short siphonal canal is wide. The anal sinus is deep and broad, separated from the body whorl by a callosity. A brown band on the periphery is a usual feature. Species Species within the genus ''Iredalea'' include: * '' Iredalea adenensis'' Morassi & Bonfitto, 2013 * '' Iredalea agatha'' (W.H. Dall, 1918) * '' Iredalea balteata'' (A.A. Gould, 1860) * ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iredalea Subtropicalis
''Iredalea subtropicalis'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Drilliidae. Description The length of an adult shell varies between 4.5 mm and 6 mm; its diameter 2.2 mm. (Original description) The narrow, fusiform shell is truncated anteriorly. The Aperture (mollusc), aperture measures one-third the length of the shell. The shell contains 9 Whorl (mollusc), whorls, of which the protoconch forms four. The whorls are flatly rounded and with an impressed suture. The smooth protoconch is sinusigera in form, the exposed portion of its lower lip concave. The Aperture (mollusc), aperture is narrow oblong, obliquely angled behind, truncated in front. The outer Lip (gastropod), lip is thick and smooth within. The anal sinus is deep, separated from the body whorl by a thick callous ridge. Columella smooth within. The siphonal canal is short and wide. Sculpture : The shell shows regular low axial ridges, about 15 on the body w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |