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Paradoxides (Hydrocephalus)
Taxonomy
Hydrocephalus was named by Barrande (1846) [Sepkoski's age data: ]. It is not extant.
It was reranked as Paradoxides (Hydrocephalus) by Fletcher et al. (2005).
It was assigned to Paradoxididae by Whittington et al. (1997); to Redlichiida by Sepkoski (2002); and to Paradoxides by Fletcher et al. (2005).
It was reranked as Paradoxides (Hydrocephalus) by Fletcher et al. (2005).
It was assigned to Paradoxididae by Whittington et al. (1997); to Redlichiida by Sepkoski (2002); and to Paradoxides by Fletcher et al. (2005).
Species lacking formal opinion data
Hydrocephalus donayrei, Hydrocephalus lyelli, Hydrocephalus mandiki, Hydrocephalus minor, Hydrocephalus rotundatus, Paradoxides brachyrhachis, Paradoxides davidis, Paradoxides enormis, Paradoxides insularis, Paradoxides polonicus, Paradoxides pradoanus, Paradoxides remus, Paradoxides rugulosus, Paradoxides sacheri, Paradoxides samsonowiczi, Paradoxides slowiecensis, Paradoxides subenormis
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1846 | Hydrocephalus Barrande |
| 1969 | Paradoxides (Eoparadoxides) Solov''yev |
| 1990 | Rejkocephalus Kordule |
| 1997 | Hydrocephalus Whittington et al. p. 476 |
| 2002 | Rejkocephalus Jell and Adrain p. 438 |
| 2002 | Hydrocephalus Sepkoski |
| 2005 | Paradoxides (Hydrocephalus) Fletcher et al. p. 321 |
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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. †Paradoxides (Hydrocephalus) Barrande 1846
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†Hydrocephalus carens Barrande 1846
†Hydrocephalus vikensis Rushton and Weidner 2007
†Paradoxides (Hydrocephalus) harlani Green 1834
Invalid names: Paradoxides (Eoparadoxides) Solov''yev 1969 [synonym], Rejkocephalus Kordule 1990 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. P. Fletcher et al. 2005 | Glabella widening markedly to L4, with anterior margin less than semicircular; S0-S2 transglabellar, S3 and S4 short, shallow; anterior cranidial border flat, not well defined by impressed border furrows, widening (sag.) markedly abaxially; in more mature stages, border furrows barely discernible. |
Measurements
No measurements are available
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| Source: g = genus, f = family, superf = superfamily, o = order, c = class | |||||
| References: Fortey and Owens 1999, Hendy 2009, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Amgan | Czechia (Bohemia) | Hydrocephalus mandiki, Rejkocephalus knizeki (67738) Paradoxides spp. (67708) | |
| Solvan - Menevian | Czechia | Hydrocephalus carens (73557 73561) Hydrocephalus lyelli (73539 73541) Hydrocephalus minor, Hydrocephalus rotundatus (73537) Hydrocephalus rotundatus, Hydrocephalus carens (73529) | |
| Wuliuan | Sweden | Hydrocephalus vikensis (240078) | |
| Middle Cambrian | Czechia (Vinice) | Hydrocephalus minor (76452) | |
| Middle Cambrian | Spain (Aragon) | Hydrocephalus harlani (120551 120553) | |
| Middle Cambrian | Spain | Hydrocephalus donayrei (55265) | |
| Middle Cambrian | Czechia | Hydrocephalus carens (199038 199039) | |
| Middle Cambrian | Czechia (Litavka) | Hydrocephalus minor (76455) Hydrocephalus sp., Rejkocephalus sp. (76453) | |
| Middle Cambrian | Czechia (Bohemia) | Hydrocephalus carens (67775) | |
| St Davids | USA (Massachusetts) | Paradoxides harlani (49340) | |
| Drumian | Czechia (Central Boemian) | Hydrocephalus carens (76456) | |
| Menevian | Sweden (Scania) | Hydrocephalus carens (179691) |