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Isognomon (Isognomon)

Bivalvia - Ostreida - Malleidae

Taxonomy
Isognomon (Isognomon) was named by Lightfoot (1786). It is extant.

It was assigned to Isognomon by Lightfoot (1786), Moore (1983).

Subtaxa
Isognomon (Isognomon) clarki, Isognomon (Isognomon) exilis, Isognomon (Isognomon) janus, Isognomon (Isognomon) panzana, Isognomon (Isognomon) rekohuensis
Species lacking formal opinion data
Isognomon ageroensis, Isognomon alatus, Isognomon bathonicus, Isognomon bathonicus, Isognomon biplicatum, Isognomon bouchardi, Isognomon brentonensis, Isognomon carolinensis, Isognomon cereviciana, Isognomon chavani, Isognomon choshiensis, Isognomon cornelliana, Isognomon flambarti, Isognomon flambarti, Isognomon flamberti, Isognomon foliaceum, Isognomon heberti, Isognomon holmesi, Isognomon ichikawai, Isognomon igsognomoides, Isognomon inaequicrenata, Isognomon infraliassica, Isognomon jupiter, Isognomon jupiter, Isognomon karakuldjensis, Isognomon lamberti, Isognomon leona, Isognomon lotenoensis, Isognomon lugdunensis, Isognomon lusitanicum, Isognomon lusitanicus, Isognomon marspiallis, Isognomon maxillatus, Isognomon maxillatus, Isognomon maxilliata, Isognomon maxilliatus, Isognomon mechanquilensis, Isognomon mimeticus, Isognomon murchisonii, Isognomon mytiloides, Isognomon nanus, Isognomon patchamensis, Isognomon perplana, Isognomon promytilodes, Isognomon promytiloides, Isognomon promytiloides, Isognomon pseudotomiyasui, Isognomon pygmaea, Isognomon quadrisulcatus, Isognomon rectangularis, Isognomon rekohuenis, Isognomon ricordeanus, Isognomon ricordiana, Isognomon rikuzenicus, Isognomon rollei, Isognomon rugosum, Isognomon rugosus, Isognomon sanchuensis, Isognomon sanchuensis, Isognomon securiformis, Isognomon subplana, Isognomon subplana, Isognomon subplanatum, Isognomon subplanum, Isognomon subspatulus, Isognomon theseni, Isognomon thurmanni, Isognomon tomiyasui, Isognomon tortum, Isognomon trivale, Isognomon valida, Isognomon volaticum, Isognomon volaticum, Isognomon woodsi, Isognomon yinganensis, Isognomon zelandica, Pedalion linguaeformis

Synonymy list
YearName and author
1786Isognomon (Isognomon) Lightfoot
1983Isognomon (Isognomon) Moore p. A84

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
—Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassPteriomorphia(Beurlen 1944)
RankNameAuthor
—OstreomorphiFerussac 1822
—OstreioniFerussac 1822
—OstreataFerussac 1822
superorderOstreiformiiFerussac 1822
orderOstreida(Fërussac 1822)
suborderMalleidinaGray 1854
superfamilyPterioideaGray 1847
familyMalleidaeLamarck 1819
subfamilyIsognomoninae(Woodring 1925)
genusIsognomonLightfoot 1786
subgenusIsognomonLightfoot 1786

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.

Subg. Isognomon (Isognomon) Lightfoot 1786
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†Isognomon (Isognomon) panzana Loel and Corey 1932
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragonitef
Composition 2: low Mg calcitef
Environment: marine, brackisho
Locomotion: stationaryg
Attached: yesg
Epibiont: yessuperf
Life habit: epifaunalg
Diet: suspension feederg
Vision: blindc
Created: 2009-04-13 11:22:47
Modified: 2025-04-24 13:29:46
Source: g = genus, f = family, superf = superfamily, o = order, c = class
References: Hendy et al. 2009, Aberhan et al. 2004, Kiessling 2004, Sanchez Roig 1926

Age range

Maximum range based only on fossils: base of the Sevatian to the top of the Early/Lower Miocene or 211.18000 to 15.98000 Ma
Minimum age of oldest fossil (stem group age): 205.7 Ma

Collections (47 total)


Time interval Ma Country or state Original ID and collection number
Norian227.3 - 205.7Hungary Isognomon exilis (70989 73188 73193)
Norian227.3 - 205.7Austria (Kaernten) Isognomon exilis (129681 129683 129684 129688)
Norian227.3 - 205.7Austria Isognomon exilis (205954)
Sevatian211.18 - 205.7Italy Isognomon exilis (201689)
Rhaetian205.7 - 201.4Italy Isognomon exilis (38167)
Rhaetian205.7 - 201.4Spain Isognomon exilis (142083)
Hettangian201.4 - 199.5Japan (Miyagi) Isognomon rikuzenicus (40541)
Sinemurian199.5 - 192.9Canada (British Columbia) Isognomon sp. (53204)
Late/Upper Pliensbachian192.9 - 184.2Argentina (Neuquen) Isognomon jupiter (33865)
Pliensbachian192.9 - 184.2Argentina (Neuquen) Isognomon jupiter (33902)
Toarcian184.2 - 174.7Japan (Miyagi) Isognomon rikuzenicus (40542)
Toarcian - Aalenian184.2 - 170.9Chile Isognomon jupiter (95384)
Callovian165.3 - 161.5China (Qinghai) Isognomon promytiloides (37884)
Early/Lower Oxfordian161.5 - 154.8France Isognomon promytiloides (8654 8655)
Late/Upper Oxfordian157.9 - 154.8Germany Isognomon promytiloides, Isognomon subplana (60387)
Kimmeridgian154.8 - 149.2Portugal (Centro) Isognomon rectangularis (68220)
Early/Lower Tithonian149.2 - 145.06Germany Isognomon flambarti (34608)
Early/Lower Tithonian149.2 - 145.06Germany (Bavaria) Isognomon mytiloides (57157) Isognomon pygmaea, Isognomon sp. (57791)
Tithonian149.2 - 143.1United Kingdom (England) Isognomon volaticum (69134)
Neocomian143.1 - 125.77Japan (Gumma) Isognomon ichikawai (40488)
Aptian121.4 - 113.2Japan (Chiba) Isognomon choshiensis (39580)
Aptian - Albian121.4 - 100.5Japan (Gumma) Isognomon sanchuensis (40490)
Piripauan86.1 - 83.6New Zealand Isognomon rekohuensis (63092)
Campanian83.6 - 72.2New Zealand Isognomon rekohuensis (63091)
Campanian - Early/Lower Maastrichtian83.6 - 66.0New Zealand (Chatham Islands) Isognomon rekohuensis (3644 3647)
Middle Eocene48.07 - 37.71USA (California) Isognomon clarki (202071 202081 202083 202084)
Bartonian41.03 - 37.71USA (Washington) Isognomon clarki (161922)
Bartonian41.03 - 37.71USA (California) Isognomon clarki (52804)
Priabonian37.71 - 33.9USA (Washington) Pedalion clarki (40733)
Priabonian37.71 - 33.9USA (Oregon) Isognomon clarki (193975)
Early/Lower Miocene23.04 - 15.98USA (California) Pedalion panzana (71228 238214 238215 238216 238218 238239)