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Holopella
Taxonomy
Holopella was named by M'Coy (1851). Its type is Holopella gracilior.
It was synonymized subjectively with Loxonema by Knight (1941) and Knight et al. (1960).
It was assigned to Holopellidae by Koken (1889) and Bouchet et al. (2005); and to Loxonematidae by Heidelberger and Koch (2005).
It was synonymized subjectively with Loxonema by Knight (1941) and Knight et al. (1960).
It was assigned to Holopellidae by Koken (1889) and Bouchet et al. (2005); and to Loxonematidae by Heidelberger and Koch (2005).
Species
H. altera, H. communis, H. contraria, H. deleta, H. dextra, H. expandens, H. gracilior (type species), H. jovialis, H. latispira, H. mira, H. modesta, H. parvula, H. regularis, H. tenera, H. teres, H. trimorpha
Synonymy list
| Year | Name and author |
|---|---|
| 1851 | Holopella M'Coy p. 47 |
| 1889 | Holopella Koken |
| 2005 | Holopella Bouchet et al. p. 89 |
| 2005 | Holopella Heidelberger and Koch p. 32 |
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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. †Holopella M'Coy 1851
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†Holopella altera Perner 1903
†Holopella communis Perner 1903
†Holopella contraria Perner 1903
†Holopella deleta Perner 1903
†Holopella dextra Perner 1903
†Holopella expandens Perner 1903
†Holopella gracilior M'Coy 1851
†Holopella jovialis Perner 1903
†Holopella latispira Grabau 1936
†Holopella mira Winchell 1863
†Holopella modesta Perner 1903
†Holopella parvula Perner 1903
†Holopella regularis Lindström 1884
†Holopella tenera Perner 1903
†Holopella teres Lindström 1884
†Holopella trimorpha Waagen 1880
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 31.0 | 27.0 | 33.5 | 33.0 | 3.62 | |
| shell diameter | 3 | 4.50 | - | - | 4.50 | - |
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| Source: f = family, o = order | |||||
| Reference: Bambach et al. 2007 | |||||
Age range: base of the Kralodvorian to the top of the Griesbachian or 449.80000 to 250.50000 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kralodvorian | Czech Republic (Bohemia) | H. deleta (105701) | |
| Hirnantian | Norway (Oslo-Asker Dist.) | H. sp. (439 441) | |
| Telychian | Sweden (Gotland) | H. regularis (3972) | |
| Sheinwoodian | Sweden (Gotland) | H. teres (13547) | |
| Sheinwoodian | United Kingdom (Wales) | H. gracilior (156583) | |
| Gorstian | Czech Republic (Hlavni města Praha) | H. modesta (104940) | |
| Ludlow | Czech Republic | H. jovialis (144741) | |
| Ludlow - Pridoli | Austria | H. compressa, H. trochleata (13912) | |
| Ludfordian | Czech Republic (Bohemia) | H. parvula (104939) | |
| Pridoli | Czech Republic (Praha) | H. expandens (155864) | |
| Pridoli - Lochkovian | Austria | H. subcompressa (13913) | |
| Pragian | Czech Republic (Bohemia) | H. contraria, H. dextra (104794) | |
| Middle Devonian | USA (Alaska) | H. sp. (111900 111901) | |
| Late/Upper Givetian | Germany (Nordrhein-Westfalen) | H. sp. (82561) | |
| Wordian | China (Nei Mongol) | H. trimorpha (109257) | |
| Wuchiapingian | Pakistan | Provermicularia latispira (126279) | |
| Changhsingian | Pakistan | H. trimorpha (89061 119608) | |
| Griesbachian | Italy | H. sp. (44451) |