Two new species of genus Limnias from Thailand, with keys to congeners (Rotifera, Gnesiotrocha)

By

Meksuwan, Phuripong
Jaturapruek, Rapeepan
Maiphae, Supiyanit

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

787

Pages

1-15

Subjects

corona , dorsal plate , horny process , SEM , sessile rotifers

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.787.28098

 

Abstract

Two new species and two morphological variant taxa of sessile rotifers found during a survey of Thai rotifers are reported upon. Living specimens were collected and identified from twelve sampling sites. The specimens were photographed, and prepared for SEMs of dorsal plates and trophi. Two new species of genus Limnias are recognized. Limniaslenissp. n. possesses a corona with a relatively shallow ventral sinus, and a dorsal plate without any projection, whereas Limniasnovemcerassp. n. carries a corona with a deep and wide ventral sinus, and a dorsal plate with nine projections. Two morphological variants of Limniasmelicerta are discussed, which are designated as L.melicerta SH and L.melicerta LH on the basis of the length of the horns on their dorsal plates. Moreover, both a dichotomous key and a formula key are provide including all Limnias species known to date.