Stromboidea

• Strombidae
  • Persististrombus
    • Persististrombus granulatus (Swainson, 1822)

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Description of Strombus granulatus by Swainson, 1841, p. 36:

• "Testa nodosa; spira producta: labii exterioris supra contracti margine inflexo, intus granulato; apertura nivea."
• "Shell nodulous; spire produced, outer lip above contracted, margin inflexed, within granulated; aperture snowy white."

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History and Synonymy

Persististrombus granulatus (Swainson, 1822: 8) (Strombus)

• Syn.: Strombus granulatus acutus Durham, 1950: 118 , pl.27 figs 1, 5 † [non Strombus acutus Perry, 1811]
• Syn.: Strombus granulatus cortezianus Durham, 1962: 213 † [nom.nov. pro Strombus granulatus acutus Durham non Perry]

1823

Strombus granulatus Mawe, 1823, pl. 25, fig. 3

1843

Strombus granulatus in Kiener, 1843, pl. 22, fig. 1

1844

Strombus granulatus in Duclos, 1844, pl. 11, fig. 5, 6

1851

Strombus granulatus in Reeve, 1851, pl. 14, fig. 32 a, b

• "Image courtesy Biodiversity Heritage Library. http://www.biodiversitylibrary.org"

1950

Original Description of Strombus granulatus acutus by Durham, 1950, p. 118:

• Shell similar to that of S. granulatus but with longer and sharper nodes; with spiral ribbing usually less well developed; and averaging smaller in size.
• Dimensions of holotype: height 56.5 mm., maximum diameter 33.7 mm.
• Holotype no. 30579 (loc. A 3550); paratype no. 30480 (loc. A 3582).
• OCCURRENCE: locs. ? A 3519, ? A 3534, A 3550, A 3577, A 3582, A 3584, A 3596, A 3598.
• RANGE: lower Pliocene (?), to Pleistocene.
• REMARKS: Over 50 specimens of this subspecies are available for comparison with an equivalent number of the typical form which is living in the Gulf of California. None of the specimens from localities where this form has been definitely identified agree with the common variants of the living species. On the other hand only two specimens of the Recent material examined have the long sharp nodes characteristic of the Pleistocene specimens. These two specimens were larger than most of the Pleistocene material. The present subspecies has an average height of about 60 mm., whereas the living form is from 75–80 mm. tall. The living form may have the nodes nearly obsolete to coarse and rounded, rarely long and slender.

Strombus granulatus acutus Durham, 1950, pl. 27, figs. 1, 2, 5

Strombus granulatus acutus Durham, 1950; Pleistocene; Coronado Island, Baja California Sur, Mexico; Holotype; UCMP 30479; Coll. University of California Museum of Paleontology

Durham, 1950, p. 118 about Strombus granulatus Mawe

• Hypotype no. 30478 (loc. A 3637) (Recent, Gulf of California).
• OCCURRENCE: Pleistocene locs. A 3508, A 3522; Recent, Gulf of California.
• RANGE: late Pleistocene, Recent.
• REMARKS: See S. granulatus subsp. acutus n. subsp.

Strombus granulatus Durham, 1950, pl. 27, figs. 3, 8

1962

Durham, 1962, p. 213:

• "Dr. Robert Robertson of the Academy of Natural Sciences of Philadelphia has kindly called my attention to the fact that my Strombus granulatus subsp. acutus (1950, Geol. Soc. America, Mem. 43, pt, 2, p. 118, pl. 27, figs. 1, 2, and 5) from the Pliocene and Pleistocene of the Gulf of California, is a homonym of Strombus acutus Perry, 1811. Accordingly, my acutus is herein renamed cortezianus, after the "Sea of Cortez"."

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Specimens from institutional collections

Persististrombus granulatus (Swainson, 1822)

1. Armuelles Formation, 450.000 yr, Pleistocene; 100 m S of Boca Quebrada Corotu, Burica peninsula, Panama; 75 mm; Coll. Naturhistorisches Museum Basel no. H17844
2. Isla Pedro González, Archipiélago de las Perlas, Panama; dredged in 40-45 ft; 34 mm; Ex-coll. Marcos Alvarez; Coll. Naturhistorisches Museum Basel no. H17853, covered with Gold for Electron Scanning
3. Armuelles Formation, 450.000 yr, Pleistocene100 m S of Boca Quebrada Corotu, Burica peninsula, Panama; 32 mm; Coll. Naturhistorisches Museum Basel no. H17843

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Specimens from private collections

Persististrombus granulatus (Swainson, 1822); Cocos Island (Spanish: Isla del Coco), Puntarenas Province, Costa Rica; by local diver; 36,6 mm; Coll. Gijs Kronenberg no. 3451

Persististrombus granulatus (Swainson, 1822); off Punto Armuelles, SW Costa Rica; at 240 feet; 57 mm; 1995; Coll. Manuel Pietzonka

Persististrombus granulatus (Swainson, 1822); Channel of Afuera Island (Isla Canal de Afuera), Veraguas Province, Panama; at 240 feet; t: 36 mm, m: 36 mm, b: 34 mm; 1994; Coll. Christian Börnke

Persististrombus granulatus (Swainson, 1822); Cebaco Island, Gulf of Montijo, Veraguas Province, Panama; dredged in muddy sand at 60-80 feet deep; 48 mm; Coll. Paul Merrill

Persististrombus granulatus (Swainson, 1822); Isla de Canal de Afuera, W-Panama; dredged 85 m; 43 mm; Coll. Francesco Giovanoli

Persististrombus granulatus (Swainson, 1822); Bay of Afuera Island, Panama, Pacific; at 240 feet; 72 mm; 1992; Coll. Manuel Pietzonka

Persististrombus granulatus (Swainson, 1822); off Cebaco Island, Panama, Pacific; at 120 feet; 30 mm; Coll. Manuel Pietzonka

Persististrombus granulatus (Swainson, 1822); [no data]; 75 mm; Coll. Francesco Giovanoli

Persististrombus granulatus (Swainson, 1822); Guaymas, Gulf of California, (Sea of Cortez), Sonora State, Mexico; 78 mm; Coll. Francesco Giovanoli

Persististrombus granulatus (Swainson, 1822); Bahia San Lucas, Gulf of California, (Sea of Cortez), Baja California Sur, Mexico; 80 mm; Coll. Francesco Giovanoli

Persististrombus granulatus (Swainson, 1822); Punta Colorado, Gulf of California (Sea of Cortez), Baja California Sur, Mexico; 67,7 mm; Coll. Paul Kanner

Persististrombus granulatus (Swainson, 1822); Galapagos Islands, Ecuador; 82 mm; Coll. Christian Börnke

Persististrombus granulatus (Swainson, 1822); Tagus Cove, Galapagos Islands, Ecuador; 70,8 mm; Coll. Paul Kanner

Persististrombus granulatus (Swainson, 1822); off Salango Island, Manabi Province, Ecuador; taken by scuba diver at 20-30 m; t: 72 mm, b: 68 mm; 11/2013; Coll. Christian Börnke

Persististrombus granulatus (Swainson, 1822); Bocapan, Tumbes, Peru; 5/1978, diver, 4 m depth; 103,1 mm; Coll. Eduardo Palacios

Persististrombus aff. granulatus (Swainson, 1822); Panama; Coll. Ulrich Wieneke

Strombus (Persististrombus) granulatus (Swainson, 1822); Bahia de Chatham, Cocos Island (Spanish: Isla del Coco), Puntarenas Province, Costa Rica; 3/1988; dredged at 80-100 m; leg. Hank Chaney et al.; Ex-Coll. Harry G. Lee; Coll. Gijs Kronenberg no. 6299

• Comment: This specimen is very similar to some forms of Persististrombus latus

Persististrombus granulatus (Swainson, 1822); Wreck Bay, San Cristobal Island, Galapagos Islands, Ecuador; taken on sandy bottom at 8 m; Coll. 1970; Coll. Virgilio Liverani

Persististrombus granulatus (Swainson, 1822); Mulege Formation, Upper Pleistocene; Near Scammons Lagoon, Baja California Sur, Mexico; 77 mm; exColl. Frank Peska Jr. in 1970s, Coll. Michael Reagin MR 15622-1240

Persististrombus granulatus (Swainson, 1822); Gatun Formation (?), Miocene (?); Panama; 76 mm; Coll. Elmar Mai

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References

• Durham, J. W. 1950. The 1940 E. W. SCRIPPS cruise to the Gulf of California: Part 2, Megascopic paleontology and marine stratigraphy, Geol. Soc. Am., Mem., p. 1–144, Fulltext
• Durham, J.W., 1962. New name for Strombus granulatus subsp. acutus Durham, 1950, not Perry, 1811. The Veliger 4(4): 213, Fulltext
• Mawe, J. 1823. The Linnaean system of conchology, describing the orders, genera, and species of shells, arranged into divisions and families; London; i-xv, 1-207, pls. 1-36, Fulltext
• Swainson, W. 1822. Appendix. Description of several new shells, and remarks on others, contained in the collection of the late Mrs. Bligh. [in] A catalogue of the rare and valuable shells, which formed the celebrated collection of the late Mrs. Bligh 20 pp. London.

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