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Multilevel fine-scale diversity challenges the ‘cryptic species’ concept
TLDR
This case study presents unique material from a charismatic group of nudibranch molluscs from European waters to reveal three new species and demonstrates that they show a dual nature: on one hand, they can be considered a ‘cryptic’ species complex due to their overall similarity, but on the other hand, stable morphological differences as well as molecular differences are demonstrated for every species in that complex.
On the occurrence of Porpita porpita in the Tyrrhenian Sea: COI and ITS2 DNA barcoding identification
TLDR
With this record the range of P. porpita within the Mediterranean basin is extended and furthermore, the use of the ITS2 as a valid DNA barcode marker for this group was here confirmed.
Ecological notes of the alien species Godiva quadricolor (Gastropoda: Nudibranchia) occurring in Faro Lake (Italy)
TLDR
A DNA barcoding approach was used to confirm the identity of this facelinid species and to explore the possible genetic divergence occurring among the samples analysed, and a short food web, without evident links with native fauna and having G. quadricolor as the top predator, is described.
Alien molluscan species established along the Italian shores: an update, with discussions on some Mediterranean “alien species” categories
TLDR
COI sequences obtained indicate that a comprehensive survey of additional European localities is needed to elucidate the dispersal pathways of Haminoea japonica, and ten taxa are no longer considered as alien species, or their records from Italy are refuted.
A DNA-barcoding approach to the phenotypic diversity of Mediterranean species of Felimare Ev. Marcus & Er. Marcus, 1967 (Mollusca: Gastropoda), with a preliminary phylogenetic analysis
TLDR
Results proved the usefulness of the DNA-barcoding approach in assessing species delimitation in this group of nudibranchs, and in identification of specimens with body colours not clear for species recognition.
THE USE OF THE UAV IMAGES FOR THE BUILDING 3D MODEL GENERATION
TLDR
The authors wanted to study the accuracy gains achieved in the building 3D model obtained with both nadir and oblique UAV flights, processed using Structure-for Motion-based approach for point cloud generation using dense image-matching algorithms implemented in an open source software.
First record of Calma gobioophaga Calado and Urgorri, 2002 (Gastropoda: Nudibranchia) in the Mediterranean Sea
TLDR
Genetic data confirmed the distinction between the two species of the genus Calma, and allowed to unambiguously identify the Croatian specimens as Calma gobioophaga, the first record of this species for the Mediterranean and extends remarkably its distribution range.
Diaphorodoris alba Portmann & Sandmeier, 1960 is a valid species: molecular and morphological comparison with D. luteocincta (M. Sars, 1870) (Gastropoda: Nudibranchia).
TLDR
A morphological study on anatomical characters and molecular analyses on the mitochondrial markers and the nuclear H3 gene proved the usefulness of the integrative taxonomy approach in assessing species delimitation; in fact Diaphorodoris alba stat.
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