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Blechnum
Taxonomy
Blechnum was named by Linnaeus (1753). It is extant. It was considered monophyletic by I (2016).
It was assigned to Polypodiaceae by Knowlton (1919); to Blechnaceae by Baldoni et al. (1985), Carpenter (1991), Chauhan (1991); and to Blechnoideae by I (2016).
It was assigned to Polypodiaceae by Knowlton (1919); to Blechnaceae by Baldoni et al. (1985), Carpenter (1991), Chauhan (1991); and to Blechnoideae by I (2016).
Species
Species lacking formal opinion data
Synonymy list
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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. Blechnum Linnaeus 1753
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†Blechnum anceps Brown 1962
†Blechnum goepperti Ettingshausen 1865
†Blechnum turbioense Frenguelli 1941
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| Spore diameter | 2 | 0.027 | 0.025 | 0.029 | 0.027 | 0.003 |
No ecological data are available
Collections (19 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tithonian - Berriasian | Russian Federation | B. sp. 1 (30677) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Antarctica | B. sp. (150271) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Canada (Alberta) | B. sp. (34894) | |
| Late/Upper Maastrichtian - Puercan | USA (Colorado) | B. anceps (39894) | |
| Paleocene | USA (Wyoming) | B. anceps (57990) | |
| Paleocene | USA (Colorado) | B. anceps (41182 53063 53076) | |
| Tertiary - Late/Upper Miocene | Venezuela (Trujillo) | B. betijoquensis (32005) | |
| Early/Lower Eocene | Argentina (Chubut) | B. sp. (136410) | |
| Early/Lower Oligocene | Australia (Tasmania) | B. sp. (166832) | |
| Oligocene | Argentina (Santa Cruz) | B. turbioense (142002) | |
| Oligocene | Argentina (Santa cruz) | B. sp. (141995) | |
| Early/Lower Oligocene - Early/Lower Miocene | Australia (Victoria) | B. sp. (169237) | |
| Early/Lower Miocene - Late/Upper Miocene | Venezuela (Trujillo) | B. betijoquensis (31280) | |
| Quaternary | India (Tamil Nadu) | B. sp. (228849) | |
| Holocene | Argentina (Loberia) | B. sp. (136381 151639) | |
| Holocene | India (Sikkim) | B. sp. (228818) |