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Species / Persististrombus Aldrichi

Persististrombus Aldrichi

Stromboidea


Original description of Strombus aldrichi by Dall, 1890:

  • "Shell of moderate size, with about nine whorls, of which two are small, smooth and nuclear; subsequent whorls spirally threaded and ribbed or tuberculate at the shoulder; spirals fine, variable, most threadlike on the early whorls, on the last whorl wavy and obsolete; early whorls transversely ribbed with 10-14 small, rounded riblets, which gradually become fewer and more nodulous until nothing but the nodules are left; on the first half of the last whorl the nodules are obsolete, on the second half there are three or four large nodules much larger than any others on the shell; behind the shoulder the shell is slightly excavated and the suture distinctly appressed and sometimes marginated by a few extra large spirals in front of it; in the vicinity of the last nodule the posterior edge of the last whorl is produced backward until it reaches the second or third whorl, counting backward; on the back of the last whorl are often a few feeble, elevated, irregular waves or obscure tubercles midway between the shoulder and the canal, recalling the stronger and more numerous waves in Strombus granulatus; aperture narrow, produced backward, squarish behind, with a groove at the commissure and an obscure subsutural ridge; outer lip in front of the angle nearly straight, smooth inside, or with a few faint granulations or lirations anteriorly; genital sulcus well marked; canal short, recurved; body with a wide and moderately thick coat of callus, but no lirae."

Locus typicus: Ten-Mile Creek, one mile west of Bailey's Ferry ; and on the Chipola River, one mile below Bailey's Ferry, Burns, West Florida, USA, loc. 2212

Stratum typicum: Chipola Formation, lower Miocene

Types: Holotype U.S. Nat. Mus. no. 112226

Strombus aldrichi Dall, 1890, pl. 12, fig. 1, 4


History and Synonymy

1904

Strombus aldrichi in Cossmann, 1904, pl. I, fig. 8, 9

1947

Gardner, 1947, p. 558 on Strombus aldrichi:

  • "Shell of moderate size, with about nine whorls, of which two are small, smooth, and nuclear; subsequent whorls spirally threaded and ribbed or tuberculate at the shoulder; spirals fine, variable, most threadlike on the early whorls, on the last whorl wavy and obsolete; early whorls transversely ribbed with 10-14 small, rounded riblets, which gradually become fewer and more nodulous until nothing but the nodules are left; on the first half of the last whorl the nodules are obsolete, on the second half there are three or four large nodules much larger than any others on the shell; behind the shoulder the shell is slightly excavated and the suture distinctly appressed and sometimes marginated by a few extra large spirals in front of it; in the vicinity of the last nodule the posterior edge of the last whorl is produced backward until it reaches the second or third whorl, counting backward; on the back of the last whorl are often a few feeble, elevated, irregular waves or obscure tubercles midway between the shoulder and the canal, recalling the stronger and more numerous waves in S. granulatus; aperture narrow, produced backward, squarish behind, with a groove at the commissure and an obscure subsutural ridge; outer lip in front of the angle nearly straight, smooth inside, or with a few faint granulations or lirations anteriorly, genital sulcus well marked; canal short, recurved; body with a wide and moderately thick coat of callus, but no lirae. Max. len. of shell 62.0; max. lat. 36,0 millimeters."

Specimens from institutional collections

Persististrombus aldrichi (Dall, 1890); Chipola Formation, Miocene; 10 mile Creek, Calhoun County, Florida, USA; 1995; Coll. Stichting Schepsel Schelp no. SSS 24061

Persististrombus aldrichi (Dall, 1890); juvenile; Chipola Formation, Miocene; Farley Creek, Calhoun County, Florida, USA; Coll. Stichting Schepsel Schelp no. SSS 59362

Persististrombus aldrichi (Dall, 1890); Chipola Formation, Miocene; Farley Creek, Calhoun County, Florida, USA; 1993; Coll. Stichting Schepsel Schelp no. SSS 22102


Specimens from private collections

Persististrombus aldrichi (Dall, 1890); Chipola Formation, Miocene; Florida, USA; Coll. Virgilio Liverani

  1. Chipola River, west bank about 2000ft above Farley Creek, 47 mm; Ex-coll. Marc Grigis
  2. Ten Mile Creek, Calhoun County, Florida, USA; 52,5 mm
  3. Chipola River, 59 mm (Persististrombus chipolanus)
  4. Chipola River, 63,5 mm (Persististrombus chipolanus)
  5. Chipola River, 58,5 mm

References


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