Triploidy in Chinese parthenogenetic Helophorus orientalis Motschulsky, 1860, further data on parthenogenetic H. brevipalpis Bedel, 1881 and a brief discussion of parthenogenesis in Hydrophiloidea (Coleoptera)

By

Angus, Robert B.
Jia, Fenglong

Type

Article

Date of Publication

2020

Original Publication

Comparative cytogenetics : international journal of plant & animal cytogenetics, karyosystematics and molecular systematics

Volume

14

Series / Issue

Issue: 1

Pages

1--10

Subjects

China , Coleoptera , H. brevipalpis , Helophorus orientalis , Hydrophiloidea , Karyotypes , Parthenogenesis , triploidy

Contributed by

Pensoft Publishers

Language

English

Published by

St. Petersburg, Russia [Published] with technical support of Zoological Institute RAS [2007]-

Identifiers

DOI: https://doi.org/10.3897/CompCytogen.v14i1.47656

 

Abstract

The chromosomes of triploid parthenogeneticHelophorus orientalisMotschulsky, 1860 are described from material from two localities in Heilongjiang, China. 3n = 33. All the chromosomes have clear centromeric C-bands, and in the longest chromosome one replicate appears to be consistently longer than the other two. The chromosomes of additional triploid parthenogeneticH. brevipalpisBedel, 1881, from Spain and Italy, are described. In one Italian population one of the autosomes is represented by only two replicates and another appears more evenly metacentric than in material from Spain and the other Italian locality. Parthenogenetic and bisexual specimens ofH. orientalisare illustrated, along with Pleistocene fossil material. ParthenogeneticH. brevipalpisis also illustrated. Parthenogenesis in Hydrophiloidea is discussed. It appears to be rare and, in all cases has been detected by chromosomal analysis of populations in which males are unexpectedly scarce. Parthenogenesis is suspected inHelophorus aquilaAngus et al., 2014, from northern Qinghai (China), which should be verified in further studies.