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Taxonomy
Hydroida was named by Johnston (1836). It is extant.
It was assigned to Hydrozoa by Taylor (1988), Waggoner and Langer (1993) and Sepkoski (2002).
It was assigned to Hydrozoa by Taylor (1988), Waggoner and Langer (1993) and Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1836 | Hydroida Johnston |
| 1988 | Hydroida Taylor p. 170 |
| 1993 | Hydroida Waggoner and Langer p. 256 |
| 2002 | Hydroida Sepkoski |
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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.
Or. Hydroida Johnston 1836
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G. †Archaeonectris
Subor. Calyptoblastina Allman 1871
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G. †Kristinella
G. †Mesokylix
G. †Palaeokylix
G. †Palaeotuba
G. †Protohalecium
G. †Sphenoecium
Subor. †Chondrophorina Chamisso and Eysenhardt 1821
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Fm. †Chondroplidae Wade 1971
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G. †Gelenoptron Conway Morris 1993
G. †Clyxhydra Kozlowski 1959
G. †Drevotella Nitecki and Richardson 1972
G. †Flexihydra
Subor. Gymnoblastina Bayer et al. 1956
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Fm. †Lafoeidae Hincks 1868
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G. †Mazohydra
G. †Palaeonectris
G. †Parleria
G. †Protulophila
G. †Psammactinia
G. †Rhabdohydra
Subor. Thecata Fleming 1828
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Bambach et al. 2007 | |||||
Age range
Maximum range based only on fossils: base of the Atdabanian to the top of the Late/Upper Maastrichtian or 521.00000 to 66.00000 Ma
Minimum age of oldest fossil (stem group age): 516.0 Ma
Minimum age of oldest fossil (stem group age): 516.0 Ma
Collections (31 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Atdabanian | China (Yunnan) | Cambrohydra ercaia (90133) | |
| Delamaran | USA (California) | Palaelophacmaea valentinei (218890) | |
| Marjumian | USA (Utah) | Sphenoecium wheelerensis (230679 230682) | |
| Tremadoc | China (HeBei) | Inocaulis sp. (7985) | |
| Floian | China (Hunan) | Inocaulis sp. (226639) | |
| Floian | Russian Federation (Siberia) | Palaeacmea humilis (206297) | |
| Fennian | United Kingdom (Wales) | Pontifennia gracilis (87604) | |
| Darriwilian | Russian Federation (Siberia) | Palaeacmea sp. (206300) | |
| Darriwilian | Algeria | Inocaulis gigas (196943) | |
| Caradoc | USA (New York) | Inocaulis aborescens (340) | |
| Katian - Hirnantian | Russian Federation (Siberia) | Inocaulis sp. (205665) | |
| Edenian | USA (Pennsylvania) | Inocaulis sp. (34895) | |
| Maysvillian | Canada (Manitoba) | Inocaulis canadensis (174050) | |
| Llandovery | USA (Michigan) | Inocaulis sp. (532) | |
| Wenlock | Canada (Ontario) | Inocaulis sp. (26855) | |
| Wenlock | USA (New York) | Inocaulis plumulosa (226164) | |
| Wenlock | USA (Indiana) | Inocaulis sp. (26856) | |
| Wenlock | United Kingdom | Hydroida indet. (68060) | |
| Pridoli | USA (New York) | Inocaulis sp. (517 26089) | |
| Early/Lower Emsian | Germany | Palaeonectris discoidea (26904) | |
| Middle Oxfordian | United Kingdom (England) | Protulophila sp. (22737) | |
| Late/Upper Barremian | Japan | Palaelophacmaea annulata (66079 66081 66082) | |
| Late/Upper Turonian | Czech Republic | Protulophila gestroi (99235) | |
| Santonian | United Kingdom | Eisenackiella thanetensis (90763) | |
| Late/Upper Maastrichtian | Belgium | Filelloides cretacea (90762) | |
| Late/Upper Maastrichtian | USA (Mississippi) | Mesodendriurn oktibbehaensis (90760) | |
| Late/Upper Maastrichtian | Netherlands | Hydrallmania graptolithiformis (90778) |