Vol. 61, 2022
Macrobiotus hupingensis, a New
Tardigrade Species in the Macrobiotus
pallarii Complex from China
Zhimin Yuan1,*, Yan
of Life Sciences, Shaanxi Normal University, Xi’an, 710100, P. R.
China. *Correspondence: E-mail: firstname.lastname@example.org (Yuan).
E-mail: email@example.com (Wang); firstname.lastname@example.org (Liu);
email@example.com (Liu); firstname.lastname@example.org(Li)
Received 3 March 2021 / Accepted 17
Communicated by Benny K.K. Chan
this paper we describe Macrobiotus
hupingensis, a new tardigrade species of the Macrobiotus pallarii complex from
southern China. We used the traditional morphology-based taxonomic
analysis, supported by detailed morphometrics, light microscopy
imaging, scanning electron microscopy, and analysis of four genetic
markers (18S rRNA, 28S rRNA, COI
and ITS-2). Macrobiotus hupingensis
sp. nov. is characterized by eggs with large, conical processes, each
surrounded by six (only sometimes five) hexagonal areolae. Based on
the morphological characters of the animals (two macroplacoids, one
microplacoid, porous curicle, Y-shaped claws) as well as genetic data,
we demonstrate the new species to be a member of the M. pallarii complex. However, it
differs specifically from M. pallarii,
M. pseudopallarii, and M. ripperi mainly by the absence
of sparse granulation between legs III and IV. It also differs from M. margoae mostly by the presence
of meshes within the entire egg process wall. Finally, the new species
can be easily distinguished M.
caymanensis by the presence of
granulation visible in light microscopy in all legs.
Key words: China, DNA barcoding, Macrobiotus hupingensis sp. nov.,
Citation: Yuan Z, Wang Y, Liu Q, Liu L, Li
X. 2022. Macrobiotus hupingensis, a new tardigrade species in the Macrobiotus pallarii complex from
China. Zool Stud 61:86.
materials: Table S1丨Table