Siphlophis Fitzinger, 1843

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 : 8

Siphlophis Fitzinger, 1843

1. Vertebral scales about as wide as paravertebrals ........................ 2

- Vertebral scales notably wider than paravertebrals ....................... .................................................. Siphlophis compressus ( Fig. 25d )

2. At least some red or orange vertebral scales or head ornamentation; dorsal pattern consisting of 60–72 middorsal red diamond-shaped markings narrowly separated by black dumbbell-shaped spots occupying 4–7 dorsal scale rows; red head dorsum with black markings; ventre with black spots, red colour restricted to the top of the dorsum ..................................... ......................................................... Siphlophis pulcher ( Fig. 25f )

- No red or orange on head or vertebral region; head reticulated or peppered with black, sometimes coinciding on medium line; dorsal pattern of 40–62 brown spots, variably offset at midline, distributed over a light brown to cream background; head pattern consisting of scattered brown spots ............................................... .............................................. Siphlophis longicaudatus ( Fig. 25e )

Figures

Fig. 25. Representative Dipsadidae Snakes of Rio de Janeiro: a, Pseudoboa nigra black and white morph from Rio de Janeiro/RJ; b, Pseudoboa nigra black morph from Sooretama/ES; c, Pseudoboa serrana from São Paulo State; d, Siphlophis compressus from Guapimirim/RJ; e, Siphlophis longicaudatus from Petrópolis/RJ; f, Siphlophis pulcher from Rio de Janeiro/RJ; g, Sordellina punctata from Brazil; h, Dibernardia affinis from Petrópolis/RJ. ES = Espírito Santo, RJ = Rio de Janeiro, SP = São Paulo. Photos by Breno Hamdan (a, d, e, f, h), Ivo Rohling Ghizoni-Jr (g), Marcelo Ribeiro Duarte (c), Miguel Relvas Ugalde (b).