[MARMAM] New publication - Tsai and Fordyce 2014 juvenile morphology in baleen whale phylogeny

Cheng-Hsiu Tsai cheng-hsiu.tsai at otago.ac.nz
Thu Aug 7 12:18:26 PDT 2014


Dear colleagues

We are pleased to announce a new article:
Cheng-Hsiu Tsai and R. Ewan Fordyce 2014 Juvenile morphology in baleen whale phylogeny. Naturwissenschaften (online first) doi: 10.1007/s00114-014-1216-9

Abstract
Phylogenetic reconstructions are sensitive to the
influence of ontogeny on morphology. Here, we use foetal/
neonatal specimens of known species of living baleen whales
(Cetacea: Mysticeti) to show how juvenile morphology of
extant species affects phylogenetic placement of the species.
In one clade (sei whale, Balaenopteridae), the juvenile is
distant from the usual phylogenetic position of adults, but in
the other clade (pygmy right whale, Cetotheriidae), the juvenile
is close to the adult. Different heterochronic processes at
work in the studied species have different influences on juvenile
morphology and on phylogenetic placement. This study
helps to understand the relationship between evolutionary
processes and phylogenetic patterns in baleen whale evolution
and, more in general, between phylogeny and ontogeny; likewise,
this study provides a proxy how to interpret the phylogeny
when fossils that are immature individuals are included.
Juvenile individuals in the peramorphic acceleration clades
would produce misleading phylogenies, whereas juvenile individuals
in the paedomorphic neoteny clades should still
provide reliable phylogenetic signals.

Keywords Evolutionary process . Phylogenetic pattern .
Ontogeny . Mysticeti . Heterochrony

Available at http://link.springer.com/article/10.1007/s00114-014-1216-9
or email Tsai: cheng-hsiu.tsai at otago.ac.nz<mailto:cheng-hsiu.tsai at otago.ac.nz>; craniata at gmail.com<mailto:craniata at gmail.com>; Ewan: ewan.fordyce at otago.ac.nz<mailto:ewan.fordyce at otago.ac.nz>

Regards and all the best,
Tsai

Cheng-Hsiu Tsai (蔡政修)
PhD student, Department of Geology, University of Otago
360 Leith Walk (Courier) or PO Box 56 (Postal)
Dunedin 9054, New Zealand
Email: cheng-hsiu.tsai at otago.ac.nz<mailto:cheng-hsiu.tsai at otago.ac.nz>; craniata at gmail.com<mailto:craniata at gmail.com>

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