T.C. Lacalli Larval Biology Web Site

Thurston Castle Lacalli, 1991
T.C. Lacalli at Sidney, B.C., 1991

TC Lacalli fonds. -- ca. 1970 - 2001. -- 2.24 metres: 81.28 cm of textual records -- 2,439 photographs. -- 11,613 negatives.


Historical note

Thurston Castle Lacalli was born on 4 August 1946 in Seattle, Washington. He attended the University of Washington, graduating with a BSc in Chemistry in 1968. After one year at Churchill College, Cambridge as an advanced student, he enrolled at the University of British Columbia for a PhD, which he completed in 1973. He had post-doctoral fellowships at McGill and UBC prior to accepting a position at the University of Saskatchewan in 1977. By 1985 he had been made a full professor. Lacalli has authored over 65 academic papers and has frequently been invited to give conference presentations regarding his work. He retired from the University in 2002.


Scope and content note

Dr. Lacalli's research examines the embryology and larval forms of marine invertebrates, principally the development of the nervous system. His work has included theoretical, computer-based studies of how patterns appear de novo in embryos as they develop, and microanatomical studies (primarily via serial electron microscopy) of the developing nervous system in simple invertebrates near the evolutionary stem from which vertebrates, with their advanced nervous system, evolved. The methods developed by Lacalli allow an image of the whole body to be shown in one micrograph, a relatively rare achievement and one which enabled him to analyse the nervous system in far more detail than was previously possible. This fonds contains an extensive collection of the electron micrographs taken by Lacalli, together with research notes, offprints, and other documentation relating to his research activities.

This fonds is organized into 3 series:

1. Personal

2. Published Articles, Conference Presentations, Notebooks

.1 Articles & Conference Presentations
.2 Notebooks

3. EM Images and Negatives

.1 Print Files - Phoronid Actinotroch Larvae
.2 Print Files - Echinoderm Larvae
.3 Print Files - Chordate Embryos and Larvae
.4 Print Files - Müller's Larva and Trochophores
.5 Negatives

Lacalli, Thurston Castle, 1946-

Finding aids:

A finding aid is available: file level with descriptions.

Restrictions on access:

There are no restrictions on access.
Original negatives for the images on this website are retained by Dr. Lacalli. High-resolution graphical files are on file within the University of Saskatchewan Archives.

Terms governing use, reproduction and publication:

Permission is granted to the University of Saskatchewan for use of images for any non-commercial academic purpose (teaching or research), including electronic reproduction on websites. T.C. Lacalli must be contacted for permission for commercial use. For all use, proper credit must be given; please consult archivist.


Further accruals are expected.

Language of material:

Material in English.


University of Saskatchewan Archives

Retrieval numbers:

Fonds 210


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