Camposipterus is a toothed pterodactyloid known from isolated front portions of the jaws in England’s Cambridge Greensand. The type species, C. nasutus, was once named as an Ornithocheirus; a 2013 revision gave it a separate genus. Its teeth and palate preserve useful distinctions, while its wings, body size and much of its skull remain unknown. The fragments belong in the pterosaur catalogue because they show how much, and how little, a handful of bones can establish.
Quick facts
| Name | Camposipterus nasutus (Seeley, 1870) |
|---|---|
| Group | Toothed pterodactyloid; ornithocheiroid |
| Age of bones | Albian, Early Cretaceous; reworked into younger deposits |
| Locality | Cambridge Greensand, eastern England |
| Type | CAMSM B 54556, front of upper jaws |
| Other species | C. sedgwickii and C. colorhinus assignments are tentative |
| Wingspan and diet | Unknown; fish-eating is plausible but unconfirmed |
What can the fossils tell us?
It preserves the rostral tip and tooth-socket arrangement, but no associated wing or backbone.
Small fragments make it difficult to separate species variation from taxonomic differences.
The sediment’s age is not always the animal’s age; reworking also mixes fossils.
From Ornithocheirus to Camposipterus
Harry Govier Seeley described type CAMSM B 54556 in 1870 as Ornithocheirus nasutus. The name-bearing fossil is only the front part of the upper jaw. In 2013, Taissa Rodrigues and Alexander Kellner reassessed the English ornithocheiroid material and placed this species in the new genus Camposipterus, named in honour of Brazilian palaeontologist Diogenes de Almeida Campos.
The genus has a firm anchor in C. nasutus. The historical species C. sedgwickii and C. colorhinus have also been associated with it, but the fragments do not securely demonstrate that all belong to one genus. Their snouts and tooth sockets differ in proportions. With so little overlapping anatomy, the differences could reflect separate taxa, variation within one lineage or preservation.
What the jaw preserves
The front of the C. nasutus snout is slightly expanded and broader than tall when viewed from the front. No premaxillary crest is present on the preserved section. The first pair of tooth sockets points forward; the next large sockets angle outwards and downwards. A raised midline ridge runs along the palate, close to the second pair of sockets. Uneven spacing between tooth positions is part of the diagnosis.
These details allow comparison with other toothed pterosaurs, including Coloborhynchus and the fragmentary English taxon Lonchodectes. They do not reveal neck length, tail shape or wingspan. A complete illustration combines this snout with anatomy inferred from better-preserved relatives.
Why the rock age needs care
The Cambridge Greensand formed during the Cenomanian, early in the Late Cretaceous. Many fossils, however, were eroded from older Albian deposits and redeposited into the younger greensand. The bone can therefore be older than the rock matrix in which collectors found it. Pterosaur material is generally treated as Albian in age, while final burial occurred later.
Reworking can round, abrade and mix fossils. Two fragments collected in the same bed are not automatically pieces of one animal or proof that the animals lived together. The catalogue keeps type specimens and tentative referrals distinct for this reason.
Feeding and size remain open
The large forward teeth and long jaws are compatible with grasping slippery prey, so fish are a reasonable possibility. No gut contents or prey fossil is associated with Camposipterus. A plausible fish-catching scene should not be confused with direct evidence of a meal.
The type jaw cannot support a reliable wingspan or body length. No complete skeleton is known, and estimates from other ornithocheiroids would require assumptions about the best comparison. The secure account is narrower: C. nasutus was a toothed pterodactyloid with a distinctive front jaw, known from older bones reworked into younger sediment.
Frequently asked questions
What fossils define Camposipterus?
The secure type is CAMSM B 54556, a front upper-jaw fragment with diagnostic tooth sockets and palate anatomy.
How old is it?
The bone is generally regarded as Albian, although it was reworked into the younger Cenomanian Cambridge Greensand.
Are all three named species equally certain?
No. C. nasutus is the type species. Referrals of C. sedgwickii and C. colorhinus remain tentative.
What did it eat and how large was it?
Neither diet nor wingspan is established. Fish are plausible, but direct food remains and complete wing bones are absent.