Age-dependent variation of aedeagal morphology in Agabus uliginosus and the status of A. lotti (Coleoptera, Dytiscidae)

By

Dettner, Konrad
Kovács, Zsolt
Rewicz, Tomasz
Csabai, Zoltán

Type

Article

Date of Publication

2024

Original Publication

ZooKeys

Volume

1212

Pages

153--177

Subjects

Aedeagal variability , Age determination , COI , DNA barcoding , internal sexual organs , phallobase

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1212.130039

 

Abstract

A doubt has arisen about the taxonomic status of Agabus lotti within the Agabus uliginosus species group due to morphological similarities and lack of molecular data. In this study, a comprehensive morphological and molecular analysis of specimens from Central Europe was conducted, focusing on the Hungarian population. Morphological comparisons of genital structures revealed age-dependent variations, suggesting a gradual transition from A. lotti to A. uliginosus. Molecular analysis of COI sequences further supported this hypothesis, showing minimal genetic differences among most specimens, with only one individual exhibiting distinctiveness. Therefore, A. lottisyn. nov. must be regarded as a junior synonym of A. uliginosus. Our findings also highlight the need for additional multi-marker studies covering a broader geographic range and including both molecular and morphological approaches to elucidate the taxonomic and phylogenetic relationships within this species group. The inclusion of Hungarian samples notably enriched the diversity of haplotypes, emphasizing the importance of expanding sampling efforts in future research.