Pseudoneotachidius sinuspersici gen. et sp. nov., a new member of the family Tachidiidae Boeck, 1865 (Copepoda: Harpacti
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ORIGINAL PAPER
Pseudoneotachidius sinuspersici gen. et sp. nov., a new member of the family Tachidiidae Boeck, 1865 (Copepoda: Harpacticoida) from Iran Fatemeh Nazari 1,2
&
Omid Mirshamsi 1,3
&
Alireza Sari 4
&
Mansour Aliabadian 1,3
&
Samuel Gomez 5
Received: 14 May 2020 / Revised: 28 July 2020 / Accepted: 15 September 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract A new member of the harpacticoid copepod family Tachidiidae Boeck, 1865 was found in sediment samples of meiobenthic harpacticoids taken during a study on the diversity of meiobenthic harpacticoids along the northern coast of the Persian Gulf. The taxonomic analysis of this material revealed that it contained an undescribed species. A new genus is herein proposed to accommodate the new species. The new genus, Pseudoneotachidius gen. nov., displays superficial similarities with Neotachidius Shen & Tai, 1963 and Cithadius Bowman, 1972, and a closer relationship is hypothesized with the former. The lack of a midventral copulatory pore, the female P5 endopodal lobe with two inner spines, and P1 with one inner seta on enp-3 are regarded here as synapomorphies for both Neothachidius and Pseudoneotachidius gen. nov. These two genera can be separated by several characters, including the structure and shape of the male fourth antennulary segment, segmentation of the antennary exopod, ornamentation of the male P2 enp-3, sexual dimorphism of the male P2 enp-2, structure and shape of the male P5, morphology of the male P2 and P3, male and female P5 armature complement and ornamentation, male P6, ventral spinulation pattern of the female genital-double somite, and in the mouthparts armature of among others. An updated key to the genera of the family Tachidiidae is presented. Keywords Intertidal . Marine . New genus . New species . Persian Gulf . Taxonomy
Abbreviations A1 antennule A2 antenna ae aesthetasc P1–P6 first to sixth swimming legs
enp exp enp-1,2,3 exp-1, 2, 3
endopod exopod proximal, middle, distal segments of endopod proximal, middle, distal segments of exopod
This article is registered in ZooBank under http://zoobank.org/ ACA49B16-6DC4-4ACE-AB9A-B941C78FA3E9 Communicated by S. Gollner * Omid Mirshamsi [email protected] 1
Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
2
Department of Biology, Faculty of Science, University of Jiroft, Jiroft, Iran
3
Research Department of Zoological Innovations (RDZI), Institute of Applied Zoology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
4
School of Biology and Centre of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
5
Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Joel Montes Camarena s/n, 82040 Mazatlán, Sinaloa, Mexico
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Introduction Our knowledge on the diversity of benthic copepods from the Persian Gulf and the Gulf of Oman is still lagging. The first comprehensive taxonomic studies on the diversity of benthic copepo
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