Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Isognomon was named by Lightfoot (1786) [Sepkoski's age data: Tr Carn R Sepkoski's reference number: 94]. It is extant. Its type is Ostrea isognomon.
It was assigned to Pterioida by Sepkoski (2002); to Isognomidae by Repin (2013) and Ros-Franch et al. (2014); and to Isognomonidae by Vokes (1980), Moore (1983), Kensley and Pether (1986), Ward (1992), Chiesa et al. (1995), Lamprell and Healy (1998), Frassinetti and Covacevich (1999), Matsubara (2002), Spencer et al. (2004), Lazo and Damborenea (2011) and Hickman (2023).
It was assigned to Pterioida by Sepkoski (2002); to Isognomidae by Repin (2013) and Ros-Franch et al. (2014); and to Isognomonidae by Vokes (1980), Moore (1983), Kensley and Pether (1986), Ward (1992), Chiesa et al. (1995), Lamprell and Healy (1998), Frassinetti and Covacevich (1999), Matsubara (2002), Spencer et al. (2004), Lazo and Damborenea (2011) and Hickman (2023).
Species
I. (Hippochaeta), I. (Iranognomon), I. (Isognomon), I. (Melina), I. (Mulletia), I. (Parviperna), I. (Semignomon), I. alatus, I. bicolor (syn. Perna chemnitziana), I. gariesensis, I. gaudichaudi (syn. Perna chilensis), I. isognomoides, I. isognomon, I. isognomonoides, I. legumen, I. maxillata, I. nucleus, I. orientalis, I. perna, I. quadrisulcata, I. radiatus, I. repini, I. valvanoi
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1786 | Isognomon Lightfoot |
1980 | Isognomon Vokes p. 44 |
1983 | Isognomon Moore p. A84 |
1986 | Isognomon Kensley and Pether p. 202 |
1992 | Isognomon Ward p. 63 |
1995 | Isognomon Chiesa et al. p. 39 |
1998 | Isognomon Lamprell and Healy p. 106 |
1999 | Isognomon Frassinetti and Covacevich p. 23 |
2002 | Isognomon Matsubara p. 135 |
2002 | Aviculoperna Sepkoski |
2002 | Isognomon Sepkoski |
2004 | Isognomon Spencer et al. |
2011 | Isognomon Lazo and Damborenea p. 729 |
2013 | Isognomon Repin p. 563 |
2014 | Isognomon Ros-Franch et al. |
2023 | Isognomon Hickman p. 21 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. Isognomon Lightfoot 1786
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Subg. Isognomon (Isognomon) Lightfoot 1786
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†Isognomon (Isognomon) exilis Stoppani 1857
Isognomon (Isognomon) janus Carpenter 1857
†Isognomon (Isognomon) panzana Loel and Corey 1932
†Isognomon (Isognomon) rekohuensis Crampton 1988
Isognomon alatus Gmelin 1791
†Isognomon gariesensis Kensley and Pether 1986
†Isognomon isognomoides Stahl 1824
†Isognomon isognomon Linnaeus 1758
†Isognomon isognomonoides Stahl 1824
†Isognomon legumen Gmelin 1790
†Isognomon maxillata Lamarck 1819
†Isognomon nucleus Lamarck 1819
†Isognomon orientalis Hamlin 1884
Isognomon perna Linnaeus 1767
†Isognomon quadrisulcata Ihering 1897
Isognomon radiatus Anton 1838
†Isognomon repini Hautmann 2001
†Isognomon valvanoi Rossi de Garcia and Levy 1977
Invalid names: Aviculoperna [synonym]
Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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height | 2 | 26.0 | 14.6 | 46.2 | 30.4 | 22.3 | |
valve height | 1 | 130.0 | - | - | - | - |
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Source: g = genus, f = family, superf = superfamily, o = order, c = class | |||||
References: Aberhan et al. 2004, Kiessling 2004, Hendy et al. 2009, Sanchez Roig 1926 |
Age range
Maximum range based only on fossils: base of the Changhsingian to the top of the Late/Upper Pleistocene or 254.17000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 252.17 Ma
Minimum age of oldest fossil (stem group age): 252.17 Ma
Collections (525 total)
Oldest occurrences | |||
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Changhsingian | China (Guizhou) | I. sp. (108547 108548 108551) | |
Julian | Italy | I. sp. (34692 69661) | |
Norian | Austria (Kaernten) | I. exilis (129681 129683 129684 129688) | |
Norian | Austria | I. exilis (205954) | |
Norian | Hungary | I. exilis (70989 73188 73193) I. sp. (70988) | |
Sevatian | Iran | I. repini (49568) | |
Sevatian | Italy | I. exilis (201689) | |
Rhaetian | Spain | I. exilis (142083) | |
Rhaetian | Iran | I. repini (48972) | |
Rhaetian | Italy | I. exilis (38167) | |
Hettangian | Japan (Miyagi) | I. rikuzenicus (40541) | |
Hettangian | Greenland | I. lugdunensis (162105) | |
Sinemurian | Canada (British Columbia) | I. sp. (53204) | |
Sinemurian | Chile | I. jupiter (7434) | |
Early/Lower Sinemurian | Hong Kong | I. sp. (137807) | |
Late/Upper Sinemurian | Chile | I. jupiter (33956) | |
Late/Upper Sinemurian | Canada (British Columbia) | I. sp. (21252) | |
Pliensbachian | Slovenia | I. sp. (68358) | |
Pliensbachian | Argentina (Neuquen) | I. jupiter (33819 33862 33895 33896 33898 33899 33902 33903 33905 33906 33907 33908 33909) | |
Pliensbachian | Greenland | I. isognomoides (162052) I. sp. (161972 161973 162058 162078 162083 162110) I. sp., I. infraliassica (161968 162113) |