Morphometric measurements throughout ontogeny of selected planktic foraminiferal test species

Development plays an important part in shaping adult morphology and morphological disparity, yet its influence on evolutionary processes is seldom explored because of a lack of preservation of ontogenetic stages in the fossil record. By preserving their entire ontogenetic history within their test, and with the advent of high-resolution imaging techniques, planktic foraminifera allow us to investigate the influence of developmental constraints on disparity. Using Synchrotron radiation X-ray tomographic microscopy (SRXTM), we reconstruct the ontogenetic progression of seven species across several of the major morphotypic groups of planktic foraminifera, including morphotypes of a species exhibiting high phenotypic plasticity and closely related pseudo-cryptic sister-taxa. We show differences in growth patterns between the globigerinid species, which appear more tightly regulated within the framework of isometry from the neanic stage, and the globorotaliid species, whose adult stages present allometric trends. Morphological change through ontogeny results in a change in surface area to volume ratios. Different metabolic processes therefore dominate at different stages of ontogeny, changing the vulnerability of the organism to environmental influences over growth, from factors affecting diffusion rates in the juvenile to those affecting energy supply in the adult. These findings identify some of the parameters within which evolutionary mechanisms have to act.

UM Men's Basketball, 1966/67 Freshman Team

Back Row: coach George Pomey, manager Dave Rigen, Rudy Tomjanovich, Michael J. Lawson, Eugene Gilmer, Willard Frauman, Charles Dobson, assistant coach Dick Honig

Middle Row: Steve Handler, Henry Weiland, Bernard Aude, Gerald Christman, Richard Bloodworth, Mark Henry

Front Row: Steven Fishman, Art Yancey, Clint Canaday, William Lyle, Karl Boukma

Le musée d'Aix-en-Provence,

"Bibliographie sommaire": p. 63.

Sites et monuments ...

Introductory chapter of each volume signed: Onésime Reclus.

Souvenirs contemporains d'histoire et de littérature /

"Édition originale" according to Vicaire cited below.

Pétrone, Apulée, Aulu-Gelle, oeuvres complètes avec la traduction en français,

Ms. notations on blank leaf at end of book.

Histoire de la ville de Sainte-Ménehould et de ses environs.

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Moreh nevukhim : ...ʻim perush Mosheh Norboni : u-ferush Givʻat ha-moreh ʻal ḥeleḳ alef bi-levad : ṿe-ḥeleḳ bet ṿe-gimel mevoʾar ʻal yede Yitsḥaḳ Haleṿi...

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Moreh nevukhim : ʻim shene perushim Mosheh mi-Narboni ṿe-Givʻat ha-moreh ʻal ḥeleḳ alef... : u-veʾur Yitsḥaḳ Saṭanov ʻal ḥeleḳ bet ṿe-gimel.

Mode of access: Internet.