Kirtlandian

Suazo, Thomas L. A New Ankylosaurid Dinosaur from the Upper Cretaceous (Kirtlandian) of New Mexico with Implications for Ankylosaurid Diversity in the Upper

; Semken, Steven C.; Berglof, William; Ulmer-Scholle, Dana , 编. The Kirtlandian, a new land-vertebrate "age" for the Late Cretaceous of western North

Bloomington and Indianapolis, IN. Sullivan, R. M.; Lucas, S. G. The Kirtlandian land-vertebrate "age"–faunal composition, temporal position and biostratigraphic

特蘭組非常常見的化石。同時被當作指標化石，斯氏五角龍的出現，象徵著朱迪斯河動物群（英语：Judithian）的結束以及科特蘭動物群（英语：Kirtlandian）的開始。後續的發現包含：MNA Pl. 1668（帶有頭骨的部分骨骼）；MNA Pl. 1747（1975年發現的頭骨、下頜、脊椎及肋骨）；USNM

University Press, pp. 310-328. Sullivan, R.M. and Lucas, S. G. (2006). "The Kirtlandian land-vertebrate "age"–faunal composition, temporal position and biostratigraphic