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Paraphyletic taxon:
Order †
Basitheropoda
Olshevsky, 1991
(vertebrate)
Taxa
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Hierarchy
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Entity:
[†Theropodomorpha] (Superorder)
..[†Lagosuchia] (Order)
..[†Theropoda] (Paraorder)
..[†Basitheropoda] (Order)
....†Longisquamidae (Family)
....†Megalancosauridae (Family)
Concise hierarchy
(Kingdom)
Animalia
-
(Phylum)
Chordata
-
(Class)
Sauropsida
Phylogeny
Paraphyletic/Ancestral (para)
Ref:
G. Olshevsky, 1991
: 103 ("Paraorder").
Original position
†
Theropodomorpha
(Superorder)
Olshevsky, 1991
Ref:
G. Olshevsky, 1991
: 103.
Original entries
†
Longisquamidae
(Family)
Sharov, 1970
Ref:
G. Olshevsky, 1991
: 103.
†
Megalancosauridae
(Family)
Olshevsky, 1991
Ref:
G. Olshevsky, 1991
: 103.
Current position
†
Theropodomorpha
(Superorder)
Olshevsky, 1991
Ref:
G. Olshevsky, 1991
: 103; PBDB(27 Oct 2013).
[
new taxon
]
Historical positions
†
Theropodomorpha
(Superorder)
Olshevsky, 1991
Ref:
G. Olshevsky, 1991
: 103.
[
new taxon
]
Number of Subtaxa
2026
Available in Systema Naturae 2000
†2f;3g
1989-present
Systema Naturae 2000
: 4 Nov 2025
[; †2f;3g]
1991
G. Olshevsky
: 103
†2f;3g;3s
©2004-2026 Universal Taxonomic Services
Last updated:
28 Aug 2026