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Megatrigonia (Apiotrigonia)
Taxonomy
Megatrigonia (Apiotrigonia) was named by Cox (1952) [Sepkoski's age data: K Haut-u K Maes]. Its type is Trigonia sulcataria.
It was reranked as Apiotrigonia by Hayami (1975), Tashiro and Kozai (1982), Sepkoski (2002) and Bouchet et al. (2010).
It was assigned to Megatrigonia by Cox (1952) and Jones (1960); to Trigoniidae by Hayami (1975); to Trigonioida by Sepkoski (2002); and to Apiotrigoniinae by Tashiro and Kozai (1982) and Bouchet et al. (2010).
It was reranked as Apiotrigonia by Hayami (1975), Tashiro and Kozai (1982), Sepkoski (2002) and Bouchet et al. (2010).
It was assigned to Megatrigonia by Cox (1952) and Jones (1960); to Trigoniidae by Hayami (1975); to Trigonioida by Sepkoski (2002); and to Apiotrigoniinae by Tashiro and Kozai (1982) and Bouchet et al. (2010).
Subtaxa
Apiotrigonia (Apiotrigonia), Apiotrigonia buchi, Apiotrigonia calderoni, Apiotrigonia chivensis, Apiotrigonia disparilis, Apiotrigonia heterosculpta, Apiotrigonia maudensis, Apiotrigonia newcombei, Apiotrigonia pennata, Apiotrigonia progonos, Apiotrigonia robinaldina, Apiotrigonia subovalis, Apiotrigonia syrdariensis, Apiotrigonia turcmenensis, Megatrigonia (Apiotrigonia) condoni (syn. Trigonia packardi), Megatrigonia (Apiotrigonia) sulcataria
Synonymy list
| Year | Name and author |
|---|---|
| 1952 | Megatrigonia (Apiotrigonia) Cox |
| 1960 | Megatrigonia (Apiotrigonia) Jones p. 158 |
| 1975 | Apiotrigonia Hayami |
| 1982 | Apiotrigonia Tashiro and Kozai p. 78 |
| 2002 | Apiotrigonia Sepkoski |
| 2010 | Apiotrigonia Bouchet et al. |
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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.
Subg. †Megatrigonia (Apiotrigonia) Cox 1952
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†Apiotrigonia buchi Geinitz 1900
†Apiotrigonia calderoni Cragin 1905
†Apiotrigonia chivensis Archangelski 1916
†Apiotrigonia disparilis d'Orbigny 1844
†Apiotrigonia heterosculpta Stanton 1901
†Apiotrigonia maudensis Whiteaves 1876
†Apiotrigonia newcombei Packard 1921
†Apiotrigonia pennata Sowerby 1819
†Apiotrigonia progonos Paulcke 1903
†Apiotrigonia robinaldina d'Orbigny 1844
†Apiotrigonia subovalis Jimbo 1894
†Apiotrigonia syrdariensis Archangelski 1900
†Apiotrigonia turcmenensis Archangelski 1900
†Megatrigonia (Apiotrigonia) condoni Packard 1921
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Invalid names: Trigonia packardi Anderson 1958 [synonym]
†Megatrigonia (Apiotrigonia) sulcataria Lamarck 1819
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 5 | 11.8 | 10.0 | 14.1 | 11.0 | 1.93 |
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| Source: o = order, c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Late/Upper Aptian to the top of the Early/Lower Campanian or 122.46000 to 70.60000 Ma
Collections (49 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Aptian | Chile (Ovalle) | Apiotrigonia progonos (222423) | |
| Albian | USA (Oregon) | Megatrigonia condoni (88611 88613 88614 88616 88617) | |
| Albian | USA (California) | Trigonia packardi (176021) | |
| Early/Lower Albian | USA (Oregon) | Megatrigonia condoni (88612 88615) | |
| Late/Upper Albian - Early/Lower Cenomanian | USA (California) | Apiotrigonia sp. (224968) | |
| Cenomanian | Japan (Ishikari) | Apiotrigonia minor (39652) Apiotrigonia minor, Apiotrigonia subovalis (39578) | |
| Cenomanian | USA (California) | Apiotrigonia condoni (220368) | |
| Cenomanian - Turonian | Russian Federation (Sakhalin) | Apiotrigonia minor (39569) | |
| Turonian | Japan (Ishikari) | Apiotrigonia minor (39669) Apiotrigonia minor, Apiotrigonia subovalis (39577) | |
| Turonian - Santonian | Japan (Ehime) | Apiotrigonia minor (40591) | |
| Late/Upper Turonian | Japan | Apiotrigonia undulosa (87013) | |
| Middle Turonian - Late/Upper Turonian | Japan | Apiotrigonia undulosa (87012) | |
| Coniacian | Japan (Fukushima) | Apiotrigonia undulosa (40168) | |
| Coniacian | Japan (Oita) | Apiotrigonia undulosa (40321) | |
| Coniacian | Japan (Kumamoto) | Apiotrigonia minor (38621) | |
| Early/Lower Coniacian | Japan (Fukushima) | Apiotrigonia minor (39626) | |
| Late/Upper Coniacian - Campanian | Japan (Tokushima) | Apiotrigonia minor (40654) | |
| Santonian | Japan (Kumamoto) | Apiotrigonia granosa, Apiotrigonia himenourensis, Apiotrigonia minor, Apiotrigonia obliquecostata (39567) Apiotrigonia utoensis (40656) | |
| Santonian - Campanian | Japan (Kagoshima) | Apiotrigonia himenourensis (40507) | |
| Early/Lower Santonian | Japan | Apiotrigonia minor (219958) | |
| Late/Upper Santonian | Japan | Apiotrigonia minor (115287 115291 115294 115297) | |
| Campanian | Japan (Hyogo) | Apiotrigonia obsoleta, Apiotrigonia postonodosa (39575) | |
| Campanian | Japan (Kumamoto) | Apiotrigonia minor, Apiotrigonia postonodosa (39565) Apiotrigonia obsoleta (40657) | |
| Campanian | Japan (Ehime) | Apiotrigonia crassoradiata (40325) | |
| Early/Lower Campanian | Japan | Apiotrigonia minor (82332 82336 82340 82341 82342 82378 82381 82382 82383 82384) | |
| Maastrichtian | Russian Federation (Sakhalin) | Apiotrigonia sp., Apiotrigonia hetonaiana (1333) | |
| Maastrichtian | Japan | Apiotrigonia dubia (1396) Apiotrigonia dubia, Apiotrigonia postonodosa (1315) |