Yesterday we looked at part 1 of convergence among reptiles. Today we’ll add a few other examples from the large reptile tree.
Silesaurus and dinosaurs: Both developed a bipedal configuration without a calcaneal tuber. All other poposaurs have a tuber. In addition, ornithischian dinos shared a predentary with Silesaurus.
Legless lizards: snakes, legless skinks, legless geckos. It is widely known that these squamate taxa all lose their limbs independently. The origin of snakes was last covered here with Tetrapodophis.
Finbacks: Spinosaurs, sphenacodonts, Lotosaurus, Arizonasaurus.These diverse taxa all have elongate dorsal spines creating a tall back fin.
Procolophonids and pareiasaurs: These unrelated taxa, Hypsognathus and Anthodon, both developed spiky laterally expanded cheek bones (quadratojugals).
Tetraceratops and basal therapsids: Both of these taxa had enlarged canines and many paleontologists consider Tetraceratops a basal therapsid. According to the large reptile tree, Tetraceratops is related to Tseajaia, which also has smaller canine teeth.
Trioceros and Triceratops: Both of these unrelated taxa developed three facial horns. Trioceros is a chameleon. Triceratops is a dinosaur.
Four clades of pterodactyloid-grade pterosaurs and two other demi-pterodactyloid pterosaurs: Various basal pterosaurs developed pterodactyloid-grade traits. Two dorygnathid taxa evolved into azhdarchids and ctenochasmatids. Two scaphognathid taxa evolved into cycnorhamphids + ornithocheirids and germanodactylids + pterodactyl ids. Wukongopterids developed some, but not all pterodactyloid-grade traits (they retain a long pedal digit 5 and long tail). Anurognathids do likewise (but they retain separate nares and a long pedal digit 5).
Azhdarchid pterosaurs and eopteranodontid pterosaurs: Both of these unrelated clades developed medium to large stork-like forms.
Longisquama and Lemur: Both of these unrelated taxa (Fig. 1) had a small skull with large orbits on a short skull, a long dorsal series, an attenuated tail held aloft, shorter forelimbs and very long leaping hind limbs.

Figure 1. Longisquama (Triassic fenestrasaur) compared to a modern Lemur. Similar body shapes might imply similar locomotory patterns. Click to enlarge.
Cartorhynchus, ichthyosaurs, plesiosaurs, certain mosasaurs and sea turtles: Cartorhynchus had large, ichthyosaur-like/plesiosaur-like fore flippers, and small hind flippers, like living sea turtles, but is related to basal pachypleurosaurs, all of which had distinct fingers.
Multiple tooth rows: captorhinids and Azendohsaurus + Trilophosaurus + Rhynchosauria: Developed independently. these taxa had multiple tooth rows developed on the maxilla and palatine.
Hyper-elongate necks: tanystropheids (Fig. 2) and sauropods. Both of these independent clades are famous for their long necks.