Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam

The number of freshwater species belonging to the genus <i>Parastenocaris</i> reported from ten countries of Southeast Asia is quite limited. Only two species have been reported so far from freshwater habitats there, compared to over 290 described species of the family Parastenocarididae...

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Autores principales:	Ngoc-Son Tran, Mau Trinh-Dang, Anton Brancelj
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Southeast Asia groundwater fauna hyporheic zone Copepoda new species taxonomy Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/ac0f9792b89e412b88e00e3c8f284932
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spelling	oai:doaj.org-article:ac0f9792b89e412b88e00e3c8f2849322021-11-25T17:22:27ZTwo New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam10.3390/d131105341424-2818https://doaj.org/article/ac0f9792b89e412b88e00e3c8f2849322021-10-01T00:00:00Zhttps://www.mdpi.com/1424-2818/13/11/534https://doaj.org/toc/1424-2818The number of freshwater species belonging to the genus <i>Parastenocaris</i> reported from ten countries of Southeast Asia is quite limited. Only two species have been reported so far from freshwater habitats there, compared to over 290 described species of the family Parastenocarididae worldwide. During the first study of the hyporheic zone of two small rivers in central Vietnam, two new species of the family Parastenocarididae were collected, <i>Parastenocaris sontraensis</i> sp. nov. and <i>Parastencaris vugiaensis</i> sp. nov. Both were collected from the gravel bar along the rivers (Suoi Da and Vu Gia river) using the Karaman–Chappuis method. Both the new species belong to the <i>brevipes</i> group of the genus <i>Parastenocaris</i> Kessler, 1913 sensu Lang (1948), and Reid (1995). <i>Parastenocaris sontraensis</i> sp. nov. is similar to <i>P. hinumaensis</i> Kikuchi, 1970 and <i>Parastenocaris jane</i> Karanovic, 2006 in the <i>brevipes</i>-group. <i>Parastenocaris sontraensis</i> sp. nov. differs from both <i>Parastenocaris</i> species by (i) Exp P3 with three segments in the male, (ii) caudal rami with seven setae, and (iii) caudal rami about 2.4 times as long as wide. <i>Parastencaris vugiaensis</i> sp. nov. can be distinguished from its congeners by the unique combination of the following characters: (i) the elliptical shape of caudal rami, (ii) apical seta (V) with bulbous base, and (iii) anal operculum extends beyond the end of anal somite. Until now, 14 stygobiotic species of Copepoda have been recorded in Vietnam (including two new species in this paper), which is relatively few compared with nearby Thailand with 25 species. Short comments on other stygobiotic Copepoda from Vietnam are added.Ngoc-Son TranMau Trinh-DangAnton BranceljMDPI AGarticleSoutheast Asiagroundwater faunahyporheic zoneCopepodanew speciestaxonomyBiology (General)QH301-705.5ENDiversity, Vol 13, Iss 534, p 534 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Southeast Asia groundwater fauna hyporheic zone Copepoda new species taxonomy Biology (General) QH301-705.5
spellingShingle	Southeast Asia groundwater fauna hyporheic zone Copepoda new species taxonomy Biology (General) QH301-705.5 Ngoc-Son Tran Mau Trinh-Dang Anton Brancelj Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
description	The number of freshwater species belonging to the genus <i>Parastenocaris</i> reported from ten countries of Southeast Asia is quite limited. Only two species have been reported so far from freshwater habitats there, compared to over 290 described species of the family Parastenocarididae worldwide. During the first study of the hyporheic zone of two small rivers in central Vietnam, two new species of the family Parastenocarididae were collected, <i>Parastenocaris sontraensis</i> sp. nov. and <i>Parastencaris vugiaensis</i> sp. nov. Both were collected from the gravel bar along the rivers (Suoi Da and Vu Gia river) using the Karaman–Chappuis method. Both the new species belong to the <i>brevipes</i> group of the genus <i>Parastenocaris</i> Kessler, 1913 sensu Lang (1948), and Reid (1995). <i>Parastenocaris sontraensis</i> sp. nov. is similar to <i>P. hinumaensis</i> Kikuchi, 1970 and <i>Parastenocaris jane</i> Karanovic, 2006 in the <i>brevipes</i>-group. <i>Parastenocaris sontraensis</i> sp. nov. differs from both <i>Parastenocaris</i> species by (i) Exp P3 with three segments in the male, (ii) caudal rami with seven setae, and (iii) caudal rami about 2.4 times as long as wide. <i>Parastencaris vugiaensis</i> sp. nov. can be distinguished from its congeners by the unique combination of the following characters: (i) the elliptical shape of caudal rami, (ii) apical seta (V) with bulbous base, and (iii) anal operculum extends beyond the end of anal somite. Until now, 14 stygobiotic species of Copepoda have been recorded in Vietnam (including two new species in this paper), which is relatively few compared with nearby Thailand with 25 species. Short comments on other stygobiotic Copepoda from Vietnam are added.
format	article
author	Ngoc-Son Tran Mau Trinh-Dang Anton Brancelj
author_facet	Ngoc-Son Tran Mau Trinh-Dang Anton Brancelj
author_sort	Ngoc-Son Tran
title	Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
title_short	Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
title_full	Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
title_fullStr	Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
title_full_unstemmed	Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam
title_sort	two new species of <i>parastenocaris</i> (copepoda, harpacticoida) from a hyporheic zone and overview of the present knowledge on stygobiotic copepoda in vietnam
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ac0f9792b89e412b88e00e3c8f284932
work_keys_str_mv	AT ngocsontran twonewspeciesofiparastenocarisicopepodaharpacticoidafromahyporheiczoneandoverviewofthepresentknowledgeonstygobioticcopepodainvietnam AT mautrinhdang twonewspeciesofiparastenocarisicopepodaharpacticoidafromahyporheiczoneandoverviewofthepresentknowledgeonstygobioticcopepodainvietnam AT antonbrancelj twonewspeciesofiparastenocarisicopepodaharpacticoidafromahyporheiczoneandoverviewofthepresentknowledgeonstygobioticcopepodainvietnam
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Two New Species of <i>Parastenocaris</i> (Copepoda, Harpacticoida) from a Hyporheic Zone and Overview of the Present Knowledge on Stygobiotic Copepoda in Vietnam

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