Universität zu Köln

Cozzi, Bruno ORCID: 0000-0002-7531-7040, Podesta, Michela, Vaccaro, Calogero, Poggi, Roberto, Mazzariol, Sandro ORCID: 0000-0002-4756-1871, Huggenberger, Stefan ORCID: 0000-0002-8085-5927 and Zotti, Alessandro ORCID: 0000-0002-9279-5140 (2015). Precocious Ossification of the Tympanoperiotic Bone in Fetal and Newborn Dolphins: An Evolutionary Adaptation to the Aquatic Environment? Anat. Rec., 298 (7). S. 1294 - 1301. HOBOKEN: WILEY. ISSN 1932-8494

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Abstract

The present study, performed with a dual-energy X-ray (DXA) bone densitometer on a series of fetal and newborn striped and short-beaked common dolphins, shows that the bone density of the area of the tympanic bulla within the tympanoperiotic complex starts with 0.483 gcm(-2) in 5- to 6-month-old specimens of striped (or common) dolphin fetuses and reaches 1.841 gcm(-2) in newborn striped dolphins, with values consistently higher than in other parts of the skull or elsewhere in the skeleton. The same results apply to the common bottlenose dolphins, in which the area of the tympanic bulla has a density of 0.312 gcm(-2) in 5-month-old specimens and becomes four times as much in newborns. Regardless of the areal bone density results correlated to the DXA-technique, comparisons with DXA-bone density data in the literature referred to other mammals emphasize the presence of very high mineral deposition in the area of the tympanoperiotic bone in fetal and newborn dolphins and the most dense part of it belongs to the tympanic bulla. The early osseous maturation of the tympanic bulla area may be compared to what described in fin whales and may represent an unique ontogenetic and phylogenetic feature of cetaceans, possibly related to the development of essential acoustic sense and establishment of immediate post-natal mother-calf relationship. Anat Rec, 298:1294-1300, 2015. (c) 2015 Wiley Periodicals, Inc.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cozzi, Bruno UNSPECIFIED orcid.org/0000-0002-7531-7040 UNSPECIFIED Podesta, Michela UNSPECIFIED UNSPECIFIED UNSPECIFIED Vaccaro, Calogero UNSPECIFIED UNSPECIFIED UNSPECIFIED Poggi, Roberto UNSPECIFIED UNSPECIFIED UNSPECIFIED Mazzariol, Sandro UNSPECIFIED orcid.org/0000-0002-4756-1871 UNSPECIFIED Huggenberger, Stefan UNSPECIFIED orcid.org/0000-0002-8085-5927 UNSPECIFIED Zotti, Alessandro UNSPECIFIED orcid.org/0000-0002-9279-5140 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-399857
DOI:	10.1002/ar.23120
Journal or Publication Title:	Anat. Rec.
Volume:	298
Number:	7
Page Range:	S. 1294 - 1301
Date:	2015
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1932-8494
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MECHANICAL-PROPERTIES; DENSITY; ROSTRUM; WHALES; PHYLOGENY; SKULL Multiple languages Anatomy & Morphology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39985