WoRMS name details
Megalomphalus depressus (G. Seguenza, 1876)
1730789 (urn:lsid:marinespecies.org:taxname:1730789)
unaccepted
Species
Adeorbis depressus (G. Seguenza, 1876) · unaccepted > superseded combination
Fossarus depressus G. Seguenza, 1874 · unaccepted > nomen nudum
Megalomphalus mercatoris Adam & Knudsen, 1969 · unaccepted
marine, brackish, fresh, terrestrial
(of Fossarus depressus G. Seguenza, 1876) Seguenza G. (1873-1877). Studi stratigrafici sulla formazione pliocenica dell'Italia meridionale. <em>Bollettino, Reale Comitato Geologico d'Italia.</em> 4: 29-45, 84-103, 131-153, 213-230, 280-301, 345-357 [1873]; 5: 3-15, 67-85, 146-152, 271-283, 331-347 [1874]; 6: 18-31, 82-99, 145-152, 203-211, 275-283, 339-345 [1875]; 7: 7-15, 91-103, 179-189, 260-271, 355-359 [1876] 8: 7-17, 91-99, 359-367 [1877]., available online at https://www.biodiversitylibrary.org/page/53765726
page(s): vol. 7 p. 180 [details]
page(s): vol. 7 p. 180 [details]
Nomenclature Adeorbis seguenzanius Tryon, 1888, was proposed as a replacement name for Fossarus depressus G. Seguenza, 1876 because of...
Taxonomy [Megalomphalus] depressus is from deeper water (down to 195 m) and we suspect that it simply is a deep water form of...
Nomenclature Adeorbis seguenzanius Tryon, 1888, was proposed as a replacement name for Fossarus depressus G. Seguenza, 1876 because of supposed secondary homonymy with Adeorbis depressus A. Adams, 1861.The latter is of uncertain affinity; no types were found in the British Museum of Natural History or in National Museum of Victoria, Melbourne.Therefore the secondary homonymy is very uncertain, but the replacement name introduced before1961 (ICZN Art, 59.3) and in use (as Tornus seguenzianus) permanently invalidates Seguenza's name. [details]
Taxonomy [Megalomphalus] depressus is from deeper water (down to 195 m) and we suspect that it simply is a deep water form of...
Taxonomy [Megalomphalus] depressus is from deeper water (down to 195 m) and we suspect that it simply is a deep water form of azonus. We are, however, not certain about this and recommend that the two names should be used whenever it is possible to classify specimens as belonging to one or the other of the two forms, to avoid confusion if they should turn out to be distinct species. [details]
MolluscaBase eds. (2025). MolluscaBase. Megalomphalus depressus (G. Seguenza, 1876). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1730789 on 2025-04-04
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
(of Fossarus depressus G. Seguenza, 1876) Seguenza G. (1873-1877). Studi stratigrafici sulla formazione pliocenica dell'Italia meridionale. <em>Bollettino, Reale Comitato Geologico d'Italia.</em> 4: 29-45, 84-103, 131-153, 213-230, 280-301, 345-357 [1873]; 5: 3-15, 67-85, 146-152, 271-283, 331-347 [1874]; 6: 18-31, 82-99, 145-152, 203-211, 275-283, 339-345 [1875]; 7: 7-15, 91-103, 179-189, 260-271, 355-359 [1876] 8: 7-17, 91-99, 359-367 [1877]., available online at https://www.biodiversitylibrary.org/page/53765726
page(s): vol. 7 p. 180 [details]
basis of record Brusina, S. (1886). Appunti ed osservazioni sull'ultimo lavoro di J. Gwyn Jeffreys. <em>Glasnik Hrvatskoga Naravoslovnoga DrusĖtva, Zagreb.</em> 1: 182-221., available online at http://biodiversitylibrary.org/page/11273702
page(s): 217-219 [details]
page(s): vol. 7 p. 180 [details]
basis of record Brusina, S. (1886). Appunti ed osservazioni sull'ultimo lavoro di J. Gwyn Jeffreys. <em>Glasnik Hrvatskoga Naravoslovnoga DrusĖtva, Zagreb.</em> 1: 182-221., available online at http://biodiversitylibrary.org/page/11273702
page(s): 217-219 [details]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From editor or global species database
Nomenclature Adeorbis seguenzanius Tryon, 1888, was proposed as a replacement name for Fossarus depressus G. Seguenza, 1876 because of supposed secondary homonymy with Adeorbis depressus A. Adams, 1861.The latter is of uncertain affinity; no types were found in the British Museum of Natural History or in National Museum of Victoria, Melbourne.Therefore the secondary homonymy is very uncertain, but the replacement name introduced before1961 (ICZN Art, 59.3) and in use (as Tornus seguenzianus) permanently invalidates Seguenza's name. [details]Taxonomy [Megalomphalus] depressus is from deeper water (down to 195 m) and we suspect that it simply is a deep water form of azonus. We are, however, not certain about this and recommend that the two names should be used whenever it is possible to classify specimens as belonging to one or the other of the two forms, to avoid confusion if they should turn out to be distinct species. [details]
