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Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America
- Source :
- ZooKeys, Vol 968, Iss, Pp 1-42 (2020), Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP, ZooKeys, ZooKeys 968: 1-42, Zookeys (1313-2989) (Pensoft Publishers), 2020-09, N. 968, P. 1-42
- Publication Year :
- 2020
- Publisher :
- Pensoft Publishers, 2020.
-
Abstract
- Caecidae is a species-rich family of microsnails with a worldwide distribution. Typical for many groups of gastropods, caecid taxonomy is largely based on overt shell characters. However, identification of species using shell characteristics is problematic due to their rather uniform, tubular shells, the presence of different growth stages, and a high degree of intraspecific variability. In the present study, a first integrative approach to caecid taxonomy is provided using light-microscopic investigation with microsculptural analyses and multi-marker barcoding, in conjunction with molecular species delineation analyses (ABGD, haplotype networks, GMYC, and bPTP). In total 132 specimens of Caecum and Meioceras collected during several sampling trips to Central America were analyzed and delineated into a minimum of 19 species to discuss putative synonyms, and supplement the original descriptions. Molecular phylogenetic analyses suggest Meioceras nitidum and M. cubitatum should be reclassified as Caecum , and the genus Meioceras might present a junior synonym of Caecum . Meiofaunal caecids morphologically resembling C. glabrum from the Northeast Atlantic are a complex of cryptic species with independent evolutionary origins, likely associated with multiple habitat shifts to the mesopsammic environment. Caecum invisibile Egger & Jorger, sp. nov. is formally described based on molecular diagnostic characters. This first integrative approach towards the taxonomy of Caecidae increases the known diversity, reveals the need for a reclassification of the genus Caecum and serves as a starting point for a barcoding library of the family, thereby enabling further reliable identifications of these taxonomically challenging microsnails in future studies.
- Subjects :
- 0106 biological sciences
0301 basic medicine
marine biodiversity
Species complex
Truncatelloidea
Meiofauna
Gastropoda
Molecular species delineation
Rissooidea
Littorinimorpha
010603 evolutionary biology
01 natural sciences
Caecum
03 medical and health sciences
Systematics
Oceans
lcsh:Zoology
Caenogastropoda
Hypsogastropoda
Biodiversity & Conservation
Genetics
Animalia
14. Life underwater
lcsh:QL1-991
Wiwaxia
Hygrophila
Marine biodiversity
Caecidae
DNA taxonomy
Ecology, Evolution, Behavior and Systematics
Conus striatus
Phylogenetic tree
biology
molecular species delineation
Cephalornis
biology.organism_classification
030104 developmental biology
Evolutionary biology
Mollusca
DNA taxonomy marine biodiversity meiofauna molecular species delineation Mollusca
meiofauna
Animal Science and Zoology
Taxonomy (biology)
Americas
Research Article
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- ZooKeys, Vol 968, Iss, Pp 1-42 (2020), Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP, ZooKeys, ZooKeys 968: 1-42, Zookeys (1313-2989) (Pensoft Publishers), 2020-09, N. 968, P. 1-42
- Accession number :
- edsair.doi.dedup.....be75effa98b26a2d23971e2e73db3b4a