T. rossmani is viviparous.[3] A female was observed giving birth to four live young. Each neonate had a snout-to-vent length of about 5 cm (2.0 in).[4]
^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Thamnophis rossmani, p. 227).
Conant R (2000). "A new species of garter snake from Western Mexico". Occasional Papers of the Museum of Natural Science, Louisiana State University, Baton Rouge (76): 1–7. (Thamnophis rossmani, new species).
Heimes P (2016). Snakes of Mexico: Herpetofauna Mexicana Vol. I. Frankfurt, Germany: Chimaira. 572 pp. ISBN978-3899731002.
Wallach V, Williams KL, Boundy J (2014). Snakes of the World: A Catalogue of Living and Extinct Species. Boca Raton, Florida: CRC Press, Taylor & Francis Group. 1,237 pp. ISBN978-1482208474. (Thamnophis rossmani, p. 725).