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Hyptiotheca
Taxonomy
Hyptiotheca was named by Bengtson et al. (1990) [Bengston in Bengston et al. 1990. Sepkoski's age data: Cm Atda-u Cm Tojo Sepkoski's reference number: 923,1057]. Its type is Hyptiotheca karraculum.
It was assigned to Hyolithida by Brock and Cooper (1993), Sepkoski (2002) and Malinky and Skovsted (2004).
It was assigned to Hyolithida by Brock and Cooper (1993), Sepkoski (2002) and Malinky and Skovsted (2004).
Species
H. karraculum (type species)
Synonymy list
Year | Name and author |
---|---|
1990 | Hyptiotheca Bengtson et al. p. 228 |
1993 | Hyptiotheca Brock and Cooper p. 776 |
2002 | Hyptiotheca Sepkoski |
2004 | Hyptiotheca Malinky and Skovsted p. 560 |
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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. †Hyptiotheca Bengtson et al. 1990
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†Hyptiotheca karraculum Bengtson et al. 1990
Diagnosis
Reference | Diagnosis | |
---|---|---|
J. M. Malinky and C.B. Skovsted 2004 | Diagnosis.—Conchs with ovoid cross−section and ventrally
directed longitudinal curvature. Ligula semi−elliptical, at 120° to dorsal apertural margin. Surface sculpture of distinct growth lines and faint longitudinal striations. Opercula with broad cardinal shield, well−defined tectula, cardinal processes about 3 lengths of the operculum width, thickened central field on inner surface, and no clavicles (from Bengtson 1990a). |
Measurements
No measurements are available
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Source: o = order, p = phylum | |||||
References: Kiessling 2004, Hendy et al. 2009 |
Age range: base of the Atdabanian to the top of the Dyeran or 521.00000 to 511.20000 Ma
Collections (37 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Atdabanian | Australia (South Australia) | H. karraculum (96454 96920 96966 97739 97740 97741 97742 97747 97749 97750) | |
Atdabanian - Botomian | Antarctica (South Shetland Islands) | H. karraculum (49691) | |
Botomian | Australia (South Australia) | H. karraculum (50793 96914 96916 96917 96932 96958 96959 96965 97717 97751 97770 97771 97773 97774 97775) | |
Dyeran | Greenland | H. karraculum (49461 49464) | |
Dyeran | Greenland (Lauge Koch Land) | H. sp. (220278) | |
Toyonian | Australia (South Australia) | H. karraculum (64451 64459 64460 64461 64462 64465 64466 96929) |