Tropidophis Müller, 1901

Luna, Igor Veronese de, Ugalde, Miguel Relvas, Guimarães, Mariana Rocha Santos, Hoffmann, Kauann, Citeli, Nathalie, Kiefer, Mara Cintia & Hamdan, Breno, 2025, Fig. 3 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population., Zoological Studies 64 (20), pp. 141-149 : 9

Tropidophis Müller, 1901

1. Scales rows in 21 or 23, rarely 25; 164–183 ventrals; vertebral scale row usually enlarged, wider than longer; interparietals typically absent, but small when present; parietals in broad contact along mid-dorsal line of head, even when interparietals are present; dorsum with small irregular spots, with diameter of at least two scales; eight spot rows around body, six on dorsum and two in the belly ............................ Tropidophis paucisquamis

Key for Viperidae Oppel, 1811

1. Tail with no rattle ....................................................................... 2

- Tail with rattle ................................................................ Crotalus

2. Distal subcaudals finely divided; keels on middorsal tubercular .. ......................................................................................... Lachesis

- Distal subcaudals single or paired; keels on middorsal not tubercular ........................................................................ Bothrops