Morphological and taxonomic demarcation of Brachionus asplanchnoidis Charin within the Brachionus plicatilis cryptic species complex (Rotifera, Monogononta)

Michaloudi, Evangelia, Mills, Scott, Papakostas, Spiros, Stelzer, Claus-Peter, Triantafyllidis, Alexander, Kappas, Ilias, Vasileiadou, Kalliopi, Proios, Konstantinos, and Abatzopoulos, Theodore John (2017) Morphological and taxonomic demarcation of Brachionus asplanchnoidis Charin within the Brachionus plicatilis cryptic species complex (Rotifera, Monogononta). Hydrobiologia, 796 (1). pp. 19-37.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: https://doi.org/10.1007/s10750-016-2924-...
 
16
1


Abstract

Three well-defined groups, consisting of 15 species, have recently been ascribed to organisms historically identified as the Brachionus plicatilis species complex. One of these groups, the large clade, is composed of two named species (Brachionus plicatilis s.s. and Brachionus manjavacas) and two species identifiers (B. 'Nevada' and B. 'Austria'). B. 'Austria' has been confirmed to be B. asplanchnoidis. As no type specimen exists for this species, and the original taxonomic description is lacking in detail, we give a detailed account of this species using material from Obere Halbjochlacke in Austria where B. 'Austria' was first identified genetically. Our analysis of B. asplanchnoidis populations was of global scope, an approach that revealed a great degree of morphological variability. However, combining aspects of both the dorsal and ventral surfaces clearly discriminated B. asplanchnoidis from the rest of the large-type members. This approach may prove useful in taxonomic studies of other cryptic species with relatively few morphological features. We also observed a geographic pattern of genetic divergence within B. asplanchnoidis. Average uncorrected COI divergences for a 554-bp fragment of the COI gene ranged from 3.9% within species to 17.5% between species of the large clade and indicate deep divisions within the cryptic species complex.

Item ID: 50625
Item Type: Article (Research - C1)
ISSN: 1573-5117
Keywords: Brachionus plicatilis, Brachionus asplanchnoidis, Brachionus 'Nevada', Brachionus 'Austria', Brachionus manjavacas, Rotifer, morphology, species delimitation
Funders: European Union (EU), Academy of Finland (AF)
Projects and Grants: EU research project ROTIGEN Q5RS-2002-01302, AF grant number 258048
Date Deposited: 20 Sep 2017 10:36
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060301 Animal Systematics and Taxonomy @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960803 Documentation of Undescribed Flora and Fauna @ 100%
Downloads: Total: 1
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page