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Dennstaedtia

Polypodiopsida - Polypodiales - Dennstaedtiaceae

Taxonomy
Dennstaedtia was named by Bernhardi (1800). It is extant.

It was assigned to Polypodiaceae by Knowlton (1919); and to Dennstaedtiaceae by Chandra and Tewari (1991), McIver and Basinger (1993), I (2016).

Species
D. americana (syn. Asplenium tenerum, Sphenopteris blomstrandi), D. concava, D. fremonti, D. rajmahalensis, D. sorimarginata
Species lacking formal opinion data
D. delicata
Entered
by J. Cassara (authorized by H. Sims) on 2003-11-30; modified by B. Allen on 2022-01-18

Synonymy list
YearName and author
1800Dennstaedtia Bernhardi
1919Dennstaedtia Knowlton
1991Dennstaedtia Chandra and Tewari
1993Dennstaedtia McIver and Basinger
2016Dennstaedtia I

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RankNameAuthor
kingdomPlantae
subkingdomViridiplantaeCavalier-Smith 1981
—Streptophyta(Jeffrey 1971)
superphylumEmbryophyta()
—Tracheophyta(Sinnott 1935)
phylumPteridophyta
RankNameAuthor
classPolypodiopsida
subclassPolypodiidae()
orderPolypodiales
suborderDennstaedtiineaeSchwartsb and Hovenkamp 2016
familyDennstaedtiaceaeLotsy 1909
genusDennstaedtiaBernhardi 1800

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. Dennstaedtia Bernhardi 1800
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†Dennstaedtia americana Knowlton 1910
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Invalid names: Asplenium tenerum Lesquereux 1883 [synonym], Sphenopteris blomstrandi Heer 1868 [synonym]
†Dennstaedtia concava Bolchovitina 1956
†Dennstaedtia fremonti Hall 1843
†Dennstaedtia sorimarginata McIver and Basinger 1993
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Diet: "photoautotroph"superp
Created: 2026-03-30 14:38:16
Modified: 2026-03-30 14:38:16
Source: superp = superphylum
Reference: Kenrick and Crane 1997

Age range: base of the Late/Upper Jurassic to the top of the Early/Lower Eocene or 161.50000 to 48.07000 Ma

Collections (22 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Jurassic161.5 - 143.1India (Jharkhand) D. rajmahalensis (225504)
Albian113.2 - 100.5USA (Idaho) D. fremonti (184621)
Late/Upper Cenomanian100.5 - 93.9USA (Wyoming) D. fremonti (31963 31964 31965 31966)
Late/Upper Cretaceous100.5 - 66.0USA (Wyoming) D. fremonti (31382)
Early/Lower Maastrichtian72.2 - 66.0Canada (Alberta) D. sp. (94370)
Paleocene66.0 - 56.0USA (Colorado) D. americana (39895)
Paleocene66.0 - 56.0Canada (Saskatchewan) D. americana (34417 34419 34427)
Paleocene66.0 - 56.0USA (North Dakota) D. americana (40430 40533 58036 58082 58087)
Paleocene66.0 - 56.0USA (Wyoming) D. americana (40937 57936)
Early/Lower Eocene56.0 - 48.07USA (Idaho) D. americana (35347 35349)
Eocene56.0 - 33.9USA (Washington) D. delicata (22993)