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Species / Lobatus

Lobatus

Stromboidea


Lobatus species are

known hybrids


History and Synonymy

Lobatus Swainson, 1837:75 , TS by monotypy Strombus bituberculatus Lamarck, 1822

  • Syn.: Aliger Thiele, 1929: 254: Type species by OD Strombus gallus Linnaeus, 1758
  • Syn.: Eustrombus Wenz, 1940: 945 Type species by [OD or monotypy] Strombus gigas Linnaeus, 1758
  • Syn.: Macrostrombus Petuch, 1994: 258. Type species by OD Strombus costatus Gmelin, 1791
  • Syn.: Titanostrombus Petuch, 1994: 261. Type species by OD Strombus goliath Schröter, 1905 [sic! Err. pro 1805]

1994

Petuch defined Macrostrombus (type: Strombus costatus Gmelin, 1791) and Titanostrombus (type: Strombus goliath Schröter, 1805)

Original Diagnosis of Macrostrombus by Petuch, 1994, p. 258:

  • "Strombus shells that are much larger than Strombus, s.s., massive, inflated, with widely-expanded, thickened lips as adults; posterior end of lip rounded, not narrowing to projection or point; body whorls sculptered with large flattened cords, giving shells ribbed appearance; shoulders often ornamented with large spikelike knobs."
  • "Type of Subgenus; Strombus costatus :Gmelin. 1791, Recent of tropical western Atlantic."
  • "Species in Macrostrombus; Living - S. costatus: Gmelin, 1791 (tropical western Atlantic); S. spectabilis Verril, (Brazilian Province and extreme southern Caribbean Province); Fossil - S. hertweckorum Petuch, 1991 (Pinecrest Fauna); S. jonesorum n.sp. (Holey Land Fauna); S. leidyi Heilprin, 1886 (Caloosahatchee Fauna); S. leidyi brachior n.subsp. (Griffin Pit Fauna); S. scotti n.sp. (Holey Land-Bermont Fauna); S. diegelae Petuch, 1991 (Bermont Fauna); S. mayacensis holeylandicus n.subsp. (Holey Land Fauna); S. mayacensis Tucker and Wilson, 1933 (Bermont Fauna); S. mulepenensis n.sp. (Pinecrest Beds Fauna, upper-most part); S. costatus griffini n.subsp. (Loxahatchee Fauna)."

Comment Petuch, 1994, p. 258:

  • "This endemic western Atlantic strombid radiation, which appears to have been centered on the Floridian Peninsula, has traditionally been placed in the subgenus Eustrombus Wenz, 1940 (type: S. gigas Linnaeus, 1758) (note: Abbott (1960) incorrectly placed S. gigas in Tricornis Jousseaume, 1886 - an unrelated, endemic Indo-Pacific, Red Sea subgenus). Since members of Macrostrombus, although large like Eustrombus, lack the large shoulder spikes of the S. gigas complex, have heavily-ribbed body whorl sculptures, and have more rounded, non-projecting lips, I felt it necessary to erect a separate subgenus for this compact western Atlantic group."

Original Diagnosis of Titanostrombus by Petuch, 1994, p. 261:

  • "Strombus shells that reach the largest sizes for the family, massive, inflated, with thin, expanded lips as adults; posterior end of lip rounded; body whorls sculptured with wide, closely-packed, flattened ribs; spire whorls low and generally flattened; spire whorls often with large spikelike knobs; body whorl rounded, without spikes or knobs; shoulder rounded, often with faint axial undulations."
  • "Type of Subgenus: Strombus goliath Schröter, 1905, Recent of the Brazilian Province."
  • "Species in Titanostrombus: Living - S. goliath Schröter, 1805 (Brazil); S. galeatus Swainson, 1823 (Panamic Province, Eastern Pacific); Fossil - S. williamsi Olsson and Petit, 1964 (Holey Land Fauna)."

Comment Petuch, 1994, p. 261:

  • "This group of giant strombids is unique to the tropical Americas, with a living species in both the Eastern Pacific and western Atlantic (Brazil). The only known fossil species, S. williamsi (Plate 20, Figure A) is found only in the Holey Land Fauna of the Everglades region, and is known from fewer than a dozen specimens. While S. (Titanostrombus) goliath is the largest living species, S. (Titanostrombus) williamsi is the largest-known fossil strombid (with specimens in excess of 300 mm). Titanostrombus is similar to Macrostrombus, but differs in being consistently larger, in having more rounded shoulders, and in having large, spikelike knobs on the early shorls. In this last character, Titanostrombus is similar to Eustrombus (type S. gigas). The co-occurence of three giant strombid genera, Macrostrombus, Eustrombus, and Titanostrombus, together in southern Florida during Holey Land time, is truly remarkable."

2011

Petuch & Drolshagen, 2011:

  • Macrostrombus briani Petuch & Drolshagen, 2011
  • Macrostrombus hertweckorum (Petuch, 1991)
  • Macrostrombus mulepenensis (Petuch, 1994)
  • Macrostrombus collierensis Petuch & Drolshagen, 2011
  • Macrostrombus leidyi (Heilprin, 1886)
  • Macrostrombus brachior (Petuch, 1994)
  • Macrostrombus dubari Petuch & Drolshagen, 2011
  • Macrostrombus jonesorum (Petuch, 1994)
  • Macrostrombus scotti (Petuch, 1994)
  • Macrostrombus diegelae (Petuch, 1991)
  • Macrostrombus tomeui Petuch & Drolshagen, 2011
  • Macrostrombus mayacensis (Tucker & Wilson, 1933)
  • Macrostrombus whicheri Petuch & Drolshagen, 2011
  • Macrostrombus bartoni Petuch & Drolshagen, 2011
  • Macrostrombus holeylandicus (Petuch, 1991)
  • Macrostrombus oleiniki Petuch & Drolshagen, 2011
  • Macrostrombus sargenti Petuch & Drolshagen, 2011
  • Macrostrombus costatus (Gmelin, 1791)

2013

Kronenberg, 2013, p. 36:

  • "The genus name Lobatus first appeared in 1837 in an anonymously compiled catalogue. Iredale (1921:208) concluded that authorship of that catalogue should be attributed to Swainson. Therefore all newly introduced names in this catalogue should be attributed to Swainson. In his broad concept of the large, broad-winged Strombidae, Abbott (1960) synonymized Lobatus with Tricornis Jousseaume, 1886 (Type species: Tricornis tricornis (= Strombus tricornis [Lightfoot], 1786) by monotypy). Jung and Heitz (2001) argued that the introduction of Lobatus should be considered as a historical accident and considered the name unavailable. The name Lobatus was further discussed by Kronenberg and Lee (2007) and Landau et al. (2008), who concluded that Lobatus was the first available name for the group of large, broad winged Strombidae from the Caribbean and Panamic Fauna province, rejecting the conclusions reached by Jung and Heitz (2001). Based on molecular (Latiolais et al., 2006) and morphological (Kronenberg, 2008) data it was concluded that Lobatus could not be considered a junior synonym of Tricornis."

Comments

  • This grouping of species follows Kronenberg et al. 2007, 2008.
  • (...), if Lobatus should be subdivided into several subgenera such as Aliger and Eustrombus in the future (see Latiolais 2003, 2006) is at present not clear." (Gijs Kronenberg, pers. commun.)

Comment G.C. Kronenberg:

  • Eustrombus Wenz, 1940
  • Aliger Thiele 1929
  • Macrostrombus Petuch, 1994
  • Titanostrombus Petuch, 1994

Kronenberg & Coworkers synomised these taxa with Lobatus, keeping an open mind to the possibility that these four taxa could be regarded as subgenera of Lobatus or even distinct; see especially Kronenberg & Lee 2007 and Landau et al. 2008.


References

  • Abbott, 1960
  • Heilprin, 1887, Link
  • Iredale. T. 1921. Molluscan nomenclatural problems and solutions. Proceedings of the Malacological Society of London 14:198-208.
  • Jung & Heitz, 2001
  • Kronenberg, G.C. 2013. First occurrence of putative hybridization in the genus Lobatus (Caenogastropda: Strombidae). – The Nautilus 127 (1): 36-39.
  • Landau, B., Kronenberg, G.C. & Herbert, G. 2008. A large new species of Lobatus (Gastropoda: Strombidae) from the Neogene of the Dominican Republic, with notes on the genus. – The Veliger 50(1): 31-38.
  • Petuch, E. J. 1991. New gastropods from the Plio-Pleistocene of southwestern Florida and the Everglades Basin. W. H. Dall Paleontological Research Center, Special Publication 1: 63 pp., [1]+5+[2] text-figs., 10 pls.
  • Petuch, E.J. 1994. Atlas of Florida fossil shells (Pliocene and Pleistocene marine Gastropods). Department of Geology, Florida Atlantic University and The Graves Museum of Archeology and Natural History. Chicago Spectrum Press, 394 pp.
  • Petuch E.J. & Drolshagen M. (2011) Compendium of Florida fossil shells, volume 1. Wellington, Florida: MdM Publishing. 412 pp.
  • [Swainson, W.] 1837. Catalogue of the Foreign Shells in the Possession of the Manchester Natural History Society, arranged according to the System of Lamarck. Manchester Natural History Society, 99pp.
  • J. Thiele, 1929. Handbuch der systematischen Weichtierkunde. 2 Bände. (1929–1935), Gustav Fischer Verlag, Jena 1935.
  • Tucker, H.I. & Wilson, D. 1933. A second contribution to the Neogene Paleontology of South Florida; Bulletins of American Paleontology vol. XVIII, pp. 63-82, pl. 10-13.

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