Campylognathoides

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Campylognathoides is an extinct pterosaur from the Early Jurassic period, about 180 million years ago, found in what is now Germany. The first fossils were fragmentary wing bones found in the Württemberg Lias. A better-preserved skeleton from Holzmaden helped scientists establish the genus. In 1894 Felix Plieninger named a related genus from a large Holzmaden skeleton, and in 1928 Embrik Strand renamed the pterosaur Campylognathoides because the previous name Campylognathus had already been used for an insect. The name Campylognathoides means “bent jaw.”

Species and naming history
Three species have been named: C. liasicus, C. zitteli, and possibly C. indicus. Distinguishing these species is tricky, and researchers have argued about whether size and growth stages (ontogeny) explain the differences. In some cases larger specimens were moved between species as scientists learned more from new finds.

What it looked like
Campylognathoides had a fairly long skull with large eye sockets and a slender, upward-curving snout. It had a short, strong body and a very long wing finger, which helped make its wings large even though the legs were relatively short. The tail could act like a rudder because the tail vertebrae were stiffened. The teeth were conical and not like the sharp fangs seen in some related pterosaurs. In the upper jaw there were several teeth that got larger toward the back; the lower jaw had many teeth as well, four to six dozen in total across known specimens.

skeleton and pelvis
A notable find was a well-preserved pelvis from a 1986 discovery, which showed the hip socket pointed upward and to the side. This suggested Campylognathoides could not stand upright on its hind legs like dinosaurs and birds and was likely not a strong biped; some scientists argued it could walk on all fours, while others believed it could occasionally stand or move on two legs. This question about how it walked remains debated.

Classification and relationships
Over the years, Campylognathoides has moved around in pterosaur family trees. Early on it was placed with the long-tailed pterosaurs (Rhamphorhynchoidea). In 1967 a scientist created a subfamily for it (Campylognathoidinae), but later researchers thought it occupied a more primitive position. Modern analyses place Campylognathoides as an early member of a group called Campylognathoididae, and many studies consider it the basalmost member of a larger group called Novialoidea. It is thought to be closely related to Eudimorphodon, another early pterosaur, though it retains some older features as well.

Diet and lifestyle
For a long time scientists debated what Campylognathoides ate. Clues from fossils suggested various ideas, from fish to small land animals. Direct evidence from fossil gut contents shows it ate Clarkeiteuthis conocauda, a belemnoid cephalopod (a relative of squids). This points to a teuthophagous diet (feeding on cephalopods). Some features also led researchers to wonder if it had especially good vision or even a possible nocturnal habit, but these ideas are not certain.

Summary
Campylognathoides was an early, long-winged pterosaur from the Early Jurassic of Germany. It has a mix of primitive and derived features, a debated stance on how it moved on the ground, and a complex history of classification. It is important for understanding how pterosaurs evolved and diversified in the early days of their existence.