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A revision of the Genus Galaxias : (Pisces: Galaxiidae) in Tasmania

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Andrews, AP (1973) A revision of the Genus Galaxias : (Pisces: Galaxiidae) in Tasmania. Unspecified thesis, University of Tasmania.

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Abstract

Eight species of the genus Galaxias are found to be
represented in Tasmania. The taxonomy, meristic and morphometric
variation of each species is examined and data on the
distribution, life history and ecology of each species are
presented together with references and synonomy.
Excluding the two genera Paragalaxias and Brachygalaxias,
which are outside the scope of the present work, a total of
twelve species and one subspecies in two genera, Galaxias and
Saxilaga, have been recorded from Tasmania at the time of writing.
G. scopus Scott is shown to be a synonym of G. truttaceus
Valenciennes while G. affinis Regan and G. coxii Macleay are
found to be synonyms of G. brevipinnis Ganther, which is recorded
for the first time from the Australian mainland. The two species
currently referred to the genus Saxilaga Scott, together with
G. upcheri Scott, are found to represent one species only. As
this species appears to possess no features which warrant generic
separation from Galaxias the species is accordingly referred to
that genus. The genus Saxilaga Scott thus comes to be abandoned.
The type locality of G. auratus is shown to be Lake
Sorell and the type locality of G. upcheri is more accurately
defined than has been done by previous writers.
The Tasmanian galaxiid fauna is broadly divisible into
two groups based on life history and ecology patterns. The first
group comprises the wide ranging diadromous species which inhabit
the coastal areas, including the offshore islands, and are also
found on the Australian mainland. The second group of species
is largely restricted to specialised lacustrine and fluviatile
areas of the inland and central region. In some cases however
considerable overlap in the ranges of both groups is evident, 2.
as in the case of G. brevipinnis, in which both diadromous and
lacustrine populations were found to occur.
The Tasmanian members of the genus Galaxias were found
to be divisible into four species groups. The first group consists
of G. maculatus and G. cleaveri. The second group consists
of G. truttaceus and the closely related species G. auratus.
The third group contains the single species G. brevipinnis while
the last group comprises the three inland species G. johnstoni,
G. pedderensis and G. parvus.
The Tasmanian galaxiid fauna is compared and contrasted
with the galaxiid faunas of Australia and New Zealand and the
distribution patterns and zoogeographic considerations are discussed.

Item Type: Thesis (Unspecified)
Keywords: Galaxiidae
Copyright Holders: The Author
Additional Information:

Thesis (M.Sc.) - Tasmania, 1974. Bibliography: l. 152-160

Date Deposited: 25 Nov 2014 00:39
Last Modified: 23 Aug 2017 06:55
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