Document of bibliographic reference 392849

BibliographicReference record

Type

Bibliographic resource

Type of document

Book/Monograph

Type of document

Dissertation

BibLvlCode

M

Title

Neue Erkenntnisse über die Taxonomie, Systematik und Evolution von Süßwasserschnecken (Viviparidae und Truncatelloidea) aus China =  Novel insights into the taxonomy, systematics and evolution of freshwater gastropods (Viviparidae and Truncatelloidea) from China

Abstract

This thesis compiles a comprehensive set of case studies on the taxonomy, systematics and evolution of two most diverse groups of freshwater gastropods from China, family Viviparidae and superfamily Truncatelloidea. Based on an integrative approach combining morphology, anatomy, molecular methods, ecology and biogeography, the present thesis provides a series of systematic revisions and the most complete list of valid species of Viviparidae from China so far. Within Viviparidae, two new genera, nine new extant species, one new fossil species, 11 new combiniations and one new synonym are proposed in the present thesis. The phylogenetic position of the new taxa within Viviparidae is discussed based on molecular phylogenetic trees. With regard to Truncatelloidea, the present thesis provides the first fossil calibrated phylogeny based on five genes, covering most extant families of Truncatelloidea. One new family, one new genus and two new species all endemic to China are proposed herein. The sessile freshwater gastropod Helicostoa lost for more than a century is rediscovered and systematically studied for the first time. Besides its sessile life style in freshwater, the new species of Helicostoa represents one of the most remarkable cases of sexual dimorphism within molluscs. The fossil calibrated phylogeny of Truncatelloidea suggests that the unique freshwater microgastropod species from Fuxian Lake of China should be a new species of a new genus within a new family, Squamapicidae. fam. nov.. The dated phylogeny reveals that this new family of freshwater gastropods originated in the Tethys Ocean during the Late Cretaceous. This thesis not only revises and describes many taxa of Viviparidae and Truncatelloidea from China, but also provides a more robust systematic frameworks for these two ancient snail groups. It also reveals several interesting cases of species radiations and evolutionary innovations, which contribute to a better understanding of their evolution.

Bibliographic citation

Zhang, L. (2024). Neue Erkenntnisse über die Taxonomie, Systematik und Evolution von Süßwasserschnecken (Viviparidae und Truncatelloidea) aus China =  Novel insights into the taxonomy, systematics and evolution of freshwater gastropods (Viviparidae and Truncatelloidea) from China. PhD Thesis. Humboldt-Universität zu Berlin: Berlin. 176 pp. https://dx.doi.org/10.18452/28380

Topic

Fresh water

Access rights

open access

Is accessible for free

true