Check-list of chromosome numbers of the family Hygromiidae (Gastropoda: Stylommatophora) with new data on Circassina frutis

By

Bakhtadze, Nana
Chakvetadze, Nino
Mumladze, Levan
Gabroshvili, Nino

Type

Article

Date of Publication

2021-12-31

Original Publication

Travaux du Muséum national d'histoire naturelle "Grigore Antipa"

Volume

64

Series / Issue

Issue: 2

Pages

7--20

Subjects

Hygromiinae , karyotype , Land snails , Leptaxinae , Phylogeny , Trochulininae

Contributed by

Pensoft Publishers

Language

English

Published by

București, România Muzeul Național de Istorie Naturală "Grigore Antipa" -2009

Identifiers

DOI: https://doi.org/10.3897/travaux.64.e69707

 

Abstract

Chromosome number data on the Hygromiidae (Gastropoda: Stylommatophora) are summarized and reviewed briefly in the context of the phylogeny of the family. In hygromiids, the haploid chromosome numbers range from 21 to 26. It is supposed that n = 21 is the ancestral chromosome number in the family. The modal haploid number for Hygromiidae is 23. Description of karyotype in terms of chromosome number and morphology of hygromiid land snail Circassina frutis is provided for the first time. The diploid chromosome number of this species is 2n = 46. The karyotype is symmetric and consists of 21 pairs of metacentric and 2 pairs of submetacentric chromosomes. The karyotype formula is as follows: 2n = 42m + 4sm (n = 21m + 2sm). The fundamental number (FN) is 92. Chromosomes range in length from 2.53 μm for the smallest pair to 6.00 μm for the largest pair. The total length of chromosomes in diploid complement (TCL) is 170.40 ± 3.22 μm.