D'Udekem d'Acoz, C., (2006). Systematic, phylogenetic and biological considerations on the genera Bathyporeia, Amphiporeia, Pontoporeia and Priscillina, with redescription of the West-Atlantic Bathyporeia species and description of a new Priscillina from Svalbard (Crustacea, Amphipoda).BULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIOLOGIE, 76: 33-110.
D'Udekem d'Acoz; C
Systematic, phylogenetic and biological considerations on the genera Bathyporeia, Amphiporeia, Pontoporeia and Priscillina, with redescription of the West-Atlantic Bathyporeia species and description of a new Priscillina from Svalbard
Crustacea, Amphipoda).BULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIOLOGIE
The two West-Atlantic species of Bathyporeia, B. parkeri and B.
qlloddyensis are re-described. They exhibit a large number of differences
with East-Atlantic and Mediterranean Bathyporeia species.
Cladistic analyses of morphological characters of all known
Bathyporeia species indicate that the two geographic groups are sister
clades. There is strong evidence that in the genus Bathyporeia
the character state 'short antennae in mature males' is the
plesiomorphic condition and that'long antennae in mature males' is
the apomorphic condition. Representatives of the genera
Amphiporeia, Pontoporeia and Priscillina are characterised and illustrated,
as a basis of comparison with Bathyporeia. These three
genera are traditionally considered to be the closest relatives of
Bathyporeia and grouped together in the family Pontoporeiidae.
The systematic position of these four alleged 'pontoporeiid' genera
is investigated in a cladistic analysis including several other
amphipods which are either morphologically similar or potentially
plesiomorphic. In this analysis the monophyly of the genus
Bathyporeia is supported by a very high number of
synapomorphies. Bathyporeia itself forms a strongly supported
clade (the Bathyporeiidae) with the genus Amphiporeia. There is no
cladistic support for a sister relationship between Bathyporeia +
Amphiporeia and Pontoporeia + Priscillina. The Bathyporeiidae
seem to have stronger affinities with the Gammaridae sensu stricto
and especially with the Pontogammaridae. The Bathyporeiidae are
therefore considered as belonging to the superfamily Gammaroidea.
Cladistic analyses of morphological characters suggest loose relationships
between the genera Hallstorills, Pontoporeia and
Priscillina. However these three genera are separated by a considerable
morphological gap. The morphological isolation of the genus
Priscillina justifies the creation of a monotypic family Priscillinidae
fam. nov. for it. The superfamily Pontoporeioidea is retained for the
Pontoporeiidae and Priscillinidae fam. nov. The material of
Priscillina used in this study includes a new species from Svalbard,
which is described as Priscillina herrmanni sp. nov.