Latest Articles from ZooKeys Latest 4 Articles from ZooKeys https://zookeys.pensoft.net/ Fri, 29 Mar 2024 11:10:05 +0200 Pensoft FeedCreator https://zookeys.pensoft.net/i/logo.jpg Latest Articles from ZooKeys https://zookeys.pensoft.net/ Symbiotic copepods (Cyclopoida and Siphonostomatoida) collected by light trap from Korea https://zookeys.pensoft.net/article/83266/ ZooKeys 1115: 1-71

DOI: 10.3897/zookeys.1115.83266

Authors: Jimin Lee, Cheon Young Chang, Il-Hoi Kim

Abstract: Thirty-nine species of symbiotic copepods, comprising 24 species of poecilostome Cyclopoida and 15 species of Siphonostomatoida, are reported from Korean waters, which were collected using underwater light traps at 33 collection sites around the South Korean coast. Ten new species are described: Hemicyclops rapax sp. nov. in the family Clausidiidae; Pontoclausia cochleata sp. nov. and P. pristina sp. nov. in the family Clausiidae; Heteranthessius unisetatus sp. nov. in the family Lichomolgidae; Pusanomyicola sensitivus gen. nov., sp. nov. in the family Myicolidae; Polyankylis bogilensis sp. nov. in the family Polyankyliidae; Pseudanthessius linguifer sp. nov. in the Pseudanthessiidae; Eupolymniphilus foliatus sp. nov. in the family Sabelliphilidae; and Acontiophorus estivalis sp. nov. and Thermocheres pacificus sp. nov. in the family Asterocheridae. Supplementary descriptions or notes for other species are provided as appropriate.

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Research Article Thu, 28 Jul 2022 18:34:55 +0300
Two new species of the genus Caligus (Crustacea, Copepoda, Siphonostomatoida) from the Sea of Japan, with a note on the establishment of a new species group https://zookeys.pensoft.net/article/46923/ ZooKeys 893: 91-113

DOI: 10.3897/zookeys.893.46923

Authors: Susumu Ohtsuka, Geoffrey A. Boxshall

Abstract: Two new species of Caligus are described from the Japanese coast of the Sea of Japan. Caligus chinglonglini sp. nov. is based on a male specimen found in a plankton sample, whereas C. kajii sp. nov. was collected from the body surface of the host flathead Platycephalus sp. These two new species can be assigned to a distinct species group, the pseudorhombi group newly named and defined by the morphology of the genital complex in both sexes, and by the structure and armature of legs 2 and 4. The species group so far accommodates 19 species including these two new species. The morphology, host specificity and zoogeography of the species group are discussed herein and keys to species groups of Caligus and to species of the C. pseudorhombi species group are provided.

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Research Article Mon, 2 Dec 2019 14:46:37 +0200
A new species of Pupulina van Beneden, 1892 (Copepoda, Siphonostomatoida, Caligidae) from Aetobatus cf. narinari (Pisces, Myliobatidae) from the Pacific coast of Ecuador https://zookeys.pensoft.net/article/26017/ ZooKeys 777: 1-16

DOI: 10.3897/zookeys.777.26017

Authors: Yanis Cruz-Quintana, Víctor Caña-Bozada, Eduardo Suárez-Morales, Ana María Santana-Piñeros

Abstract: A new caligid copepod species, Pupulina mantensis sp. n. is described based on female and male specimens collected from the gills of the myliobatid elasmobranch Aetobatus cf. narinari Euphrasen, 1790 captured off the Pacific coast of Ecuador. The new species has a unique combination of characters that diverges from its known congeners, including: (i) weakly developed posterolateral processes on the genital complex; (ii) large spines on posterior surface of maxilliped basis (iii) abdomen slender, unsegmented, approximately 1/2 length and 1/5 width of genital complex; (iv) third exopodal segment of leg II with single long naked spine adjacent to minute, naked lateral spine; (v) velum of leg II with adjacent patch of denticles; (vi) caudal rami slightly less than half the length of genital complex; (vii) post-antennal process with robust, posteriorly directed tine, sclerotized stump posterolaterally, and two multi-sensillate papillae located on or near base of process (viii) post-oral process oval. The overall prevalence of P. mantensis sp. n. on its host was 37.5% and its mean abundance was 1.87 specimens per host. This is the second record of the genus Pupulina from Ecuador and the second record of Pupulina infecting rays of the Myliobatinae genus Aetobatus, of the subfamily Myliobatinae, after its discovery on A. ocellatus in Australia, thus confirming this expansion of its previously known host range to a new elasmobranch subfamily.

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Research Article Mon, 30 Jul 2018 13:43:56 +0300
A new species of Monocheres Stock (Copepoda, Siphonostomatoida, Asterocheridae) from shallow waters off Florida, USA: an unexpected discovery https://zookeys.pensoft.net/article/9137/ ZooKeys 607: 93-102

DOI: 10.3897/zookeys.607.9137

Authors: Eduardo Suarez-Morales

Abstract: The rare asterocherid copepod genus Monocheres, ectosymbionts of corals and sponges, contains only two species, one from Mauritius (Indian Ocean) and the other one from Brazil (western Atlantic). From the analysis of the digestive caecum contents of the benthic hesionid polychaete Hesione picta Müller, 1858, an adult female of an undescribed species of Monocheres was unexpectedly recovered; it is the third species of this rare asterocherid genus. The new species, M. sergioi sp. n., has the distinctive reduction of the fifth leg as a process with a single seta. It differs from its two other congeners by several characters including the presence of an inner basipodal spine, the armature details of the third exopodal segment of leg 1, the shape of the cephalosome and pedigerous somites 3 and 4, and the ornamentation of the postero-lateral corners of the genital double-somite. The main synapomorphies include the presence of spinules along the posterior margin of the first leg coxal sclerite and the reduced, spiniform coxal seta on leg 4. The biology and feeding habits of the polychaete containing this specimen suggests that the copepod was ingested as an ectosymbiont from sponges or coral but it is also possible that it was consumed from an ophiurid echinoderm. This finding allows an expansion of the genus geographical distribution in the northwestern Atlantic. A key to the species of Monocheres is also provided.

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Research Article Wed, 27 Jul 2016 18:49:52 +0300