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Ellen-Thérèse Lamm


Ellen-Thérèse Lamm, Histology Lab Manager, Museum of the RockiesEllen-Thérèse Lamm hails from the ‘Garden State,’ but has dreamed of the ‘Treasure State’ since the age of six – when she first saw photographs of Glacier National Park.  The gift of a microscope, for her tenth birthday, helped her to discover another passion – cell biology.  Ellen-T’s work at the Museum of the Rockies (MOR) has enabled her to combine both.

At Rutgers-Cook College in NJ, Ellen-T gained extensive experience with large and small animals, under veterinary, farm, and laboratory conditions, and participated in research studying hypertension and the microanatomy of the adrenal gland.  While an undergraduate, Ellen-T enjoyed her first Montana adventure working on the Wolf Ecology Project in Glacier National Park during the summer of 1986.

In 1991 Ellen-T joined Jack Horner at the Museum of the Rockies, as his research was redefining our understanding of dinosaur behavior.  Ellen-T began instructing students in paleohistology techniques, enabling exciting discoveries about dinosaur physiology, growth, and behavior through examining microscopic structure of fossilized bone, ossified tendons, eggshell, and teeth.

To date, our MOR Histology Lab has collaborated with researchers at over 100 institutions around the world. Over 2,500 specimens have been thin-sectioned, and thousands of slides cataloged, creating an extensive reference library of fossil tissue structure.  Requests for the use of MOR’s histology lab and collections are increasing, with a new generation of students and visiting researchers seeking training and access to one of the largest, most comprehensive histology collections in the world. Email Ellen-Thérèse

Watch Ellen on PBS EONS - March 2018


International Symposium on Paleohistology (ISPH)

  • July 2017 – New Jersey State Museum, Trenton, New Jersey.
  • July 2015 – Steinmann-Institute, Bonn, Germany.
  • July 2013 – Museum of the Rockies – MSU, Bozeman, Montana.

The National Society for Histotechnology (NSH): Paleohistology: Concepts, Applications & Techniques Workshops
Presented by: Ellen-T. Lamm and Damien Laudier, Laudier Histology, New York, NY.

  • September 2016 – Long Beach, California (also with Christian Heck, Univ. of Oklahoma)
  • August 2014 – Austin, Texas
  • October 2012 – Vancouver, B.C., Canada.


Co-editor, Bone Histology of Fossil Tetrapods: Advancing Methods, Analysis and Interpretation, (eds. Padian K, Lamm ET), University of California Press, Berkeley (2013).

Lamm ET.  2013.  Chapter 4 - Preparation and Sectioning of Specimens. In: Bone Histology of Fossil Tetrapods: Advancing Methods, Analysis and Interpretation, (eds. Padian K, Lamm ET), pp. 55–160.  University of California Press, Berkeley. 

Padian KP, Lamm ET, Werning S.  2013.  Chapter 3 - Selection of Specimens.  In: Bone Histology of Fossil Tetrapods: Advancing Methods, Analysis and Interpretation, (eds. Padian K, Lamm ET), pp. 35–54.  University of California Press, Berkeley.

Horner JR, Lamm ET.  2011.  Ontogeny of the parietal frill of Triceratops: a preliminary histological analysis. Comptes Rendus Palevol 10(5-6): 439–452.  doi:10.1016/j.crpv.2011.04.006  

Green JL, Schweitzer MH, Lamm ET.  2010.  Limb bone histology and growth in Placerias hesternus (Therapsida:Anomodontia) from the Upper Triassic of North America.  Palaeontology 53(2): 347–364.  doi: 10.1111/j.1475-4983.2010.00944.x 

Schweitzer MH, Elsey RM, Dacke CG, Horner JR, Lamm ET.  2007.  Do egg-laying crocodilian (Alligator mississippiensis) archosaurs form medullary bone?  BONE 40(4): 1152–1158.  PMID: 17223615 

Lee A, Bybee P, Lamm ET.  2006.  Sizing up the Jurassic theropod Allosaurus: assessing growth strategy and evolution of ontogenetic scaling of limbs.  Journal of Morphology 267: 347–359.  doi: 10.1002/jmor.10406 

de Ricqlès, AJ, Padian, KP, Horner, JR, Lamm, ET, Myhrvold, N.  2003. Osteohistology of Confuciusornis sanctus (Theropod:Aves).  Journal of Vertebrate Paleontology 23 (2):373-386.  PMID: 4524324


Carsia RV, Lamm ET, Marsh JA, Scanes CG, King DB.  1997.  The thyroid hormone 3,5,3-triiodothyronine, is a negative modulator of domestic fowl (Gallus gallus domesticus) adrenal steroidogenic function.  General and Comparative Endocrinology 107(2): 251–261.

Kocsis JF, Lamm ET, McIlroy PJ, Scanes CG, Carsia RV.  1995.  Evidence for functionally distinct subpopulations of steroidogenic cells in the domestic turkey (Meleagris gallopavo) adrenal gland.  General and Comparative Endocrinology 98(1): 57–72.


Lamm, ET, Macguire, KC, Goodwin, MB.  2012.  Histological Preparation of a Columbian Mammoth (Mammuthus columbi) Tusk for Display - The 5th Annual Fossil Preparation & Collections Symposium – Burke Museum, University Of Washington.

Horner, JR, Lamm, ET.  2009.  Metaplasia Provided Dinosaur Skulls Extreme Morphological Plasticity During Ontogeny.  Journal of Vertebrate Paleontology 29(Supp.3).

Lamm, ET.  2007.  Paleohistology Widens the Field of View in Paleontology. Proceedings – Microscopy and Microanalysis 13(2): 50.

Dacke, CG, Elsey, RM, Tosclair III, PL, Schweitzer, MH, Lamm, ET.  2007. Calcium Metabolic Strategies in Egglaying Crocodilian (Alligator mississippiensis) Archosaurs.  BONE 40(6-Supp. 2):S103.

Lee, A., Bybee, P., Lamm, ET.  2005.  Ontogenetic Histology of Allosaurus (Dinosauria:Theropoda): Assessing Growth Trajectory and Evolution of Ontogenetic Limb Allometry.  Journal of Vertebrate Paleontology 25(Supp.3).

Lamm, ET.  2001.  Put It Back the Way You Found It: Restoration of Histological Fossil Specimens.  Journal of Vertebrate Paleontology 21(3):71A.

Ancell, CV, Lamm, ET.  2001.  Deconstruction and Reconstruction of a Pachycephalosaurus Skull for Histological Examination and Exhibit.  Journal of Vertebrate Paleontology 21(3):28A.

Lamm, ET.  1999.  Histological Techniques for Small Paleontological Specimens.  Journal of Vertebrate Paleontology 19(3):58A.

Lamm, ET.  1998.  New Methods for the Preparation and Systematic Organization of Histological Sections.  Journal of Vertebrate Paleontology 18(3):58A.

Gentry, A., Lamm, ET.  1993.  Thin-section Preparation of Fossil Material for Histological Study.  Journal of Vertebrate Paleontology 13(3):37A.


  • National Society for Histotechnology – Polysciences Anne Preece Award (2016)
  • National Society for Histotechnology – Leonard Noble Educational Scholarship (2015)
  • Photomicrograph Competitions
    • Buehler Ltd. (2012, 2008, 2007, 2006)
    • Olympus Bioscapes (2009)
    • Microscopy Society of America (2006. 2007)