Lambert Beverly Halstead (13 June 1933 – 30 April 1991), who also went by Lambert Beverly Halstead Tarlo, was a British paleontologist & professor of Geology & Zoology and popularizer of science. He was noted for his candid theories of dinosaur sexual habits, and also for a prolonged assault on phylogenetic systematics (or "cladism", as he referred to it), in a series of letters and editorials to the journal Nature in the late 1970s and early 1980s.
He was President of the Geologists' Association for 1990-91.
- "The Wyley History of the Geologists' Association in the 50 years 1958–2008" (PDF). Geologists Association. Retrieved 16 September 2019.
- Sarjeant, William A. S. "Lambert Beverly Halstead (1933-1992): his life, his discoveries and his controversies". Modern Geology. 18 (Halstead Memorial Volume, 1): 5–59. Republished in W.A.S. Sarjeant (ed.), Vertebrate fossils and the evolution of scientific concepts. Writings in tribute to Beverly Halstead. Reading, England: Gordon & Breach Publishers, 1995.
- Sarjeant, William A. S. "(Lambert) Beverly Halstead (1933-1991)". Oxford Dictionary of National Biography.