Mytilicola porrecta n. sp. (Copepoda: Cyclopoida) from the Intestine of Marine Pelecypods

1954 ◽  
Vol 40 (2) ◽  
pp. 186 ◽  
Author(s):  
Arthur G. Humes
Keyword(s):  
Copepoda Cyclopoida

A New Genus of Ergasilidae (Copepoda: Cyclopoida) from the Gills of Astyanax fasciatus (Cuvier, 1819) (Actinopterygii: Characidae)

2019 ◽  
Vol 64 (4) ◽  
pp. 850-865 ◽  
Author(s):  
Rodrigo Bravin Narciso ◽  
Heleno Brandão ◽  
Gilmar Perbiche-Neves ◽  
Reinaldo José da Silva
Keyword(s):  
New Genus ◽  
Astyanax Fasciatus ◽  
Copepoda Cyclopoida

THE EURASIAN THERMOCYCLOPS CRASSUS (FISCHER, 1853) (COPEPODA, CYCLOPOIDA) FOUND IN SOUTHEASTERN MEXICO

Crustaceana ◽  
2000 ◽  
Vol 73 (6) ◽  
pp. 705-713 ◽  
Author(s):  
Martha Gutiérrez-Aguirre ◽  
Eduardo Su´rez-Morales
Keyword(s):  
Copepoda Cyclopoida

Rheocyclops, a New Genus of Copepods from the Southeastern and Central U.S.A. (Copepoda: Cyclopoida: Cyclopidae)

1999 ◽  
Vol 19 (2) ◽  
pp. 384 ◽  
Author(s):  
Janet W. Reid ◽  
David L. Strayer ◽  
J. Vaun McArthur ◽  
Suzanne E. Stibbe ◽  
Julian J. Lewis
Keyword(s):  
New Genus ◽  
Copepoda Cyclopoida

Some new and known species of Bomolochidae (Copepoda, Cyclopoida) parasitic on Japanese actinopterygian fishes, 3

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 447-465
Author(s):  
Kunihiko Izawa
Keyword(s):  
Male Specimen ◽  
Actinopterygian Fishes ◽  
Dorsal Process ◽  
First Time ◽  
Respective Species ◽  
Copepoda Cyclopoida

Abstract Orbitacolax bispinus sp. nov., Orbitacolax leptoscari (Yamaguti, 1953), Paraorbitacolax sphyraenae Izawa, 2021, and one male specimen of a Bomolochidae sp. are (re)described. The male and copepodid V female of O. leptoscari, and the male and copepodid V male of P. sphyraenae are described for the first time for the respective species. A description performed in Izawa (2020, 2021) that the maxilliped of the female bears a dorsal process in Orbitacolax and Paraorbitacolax spp., was wrong and is herein corrected.

Genome size in cyclopoid copepods (Copepoda: Cyclopoida): chromatin diminution as a hypothesized mechanism of evolutionary constraint

2021 ◽  
Vol 41 (3) ◽  
Author(s):  
Emilly Schutt ◽  
Maria Hołyńska ◽  
Grace A Wyngaard
Keyword(s):  
Genome Size ◽  
Life Histories ◽  
Nuclear Dna ◽  
Cell Lineage ◽  
Fundamental Property ◽  
Nuclear Dna Content ◽  
Evolutionary Constraint ◽  
Chromatin Diminution ◽  
Somatic Genome ◽  
Copepoda Cyclopoida

Abstract Genome size is a fundamental property of organisms that impacts their molecular evolution and life histories. The hypothesis that somatic genome sizes in copepods in the order Cyclopoida are small and evolutionary constrained relative to those in the order Calanoida was proposed 15 years ago. Since then, the number of estimates has almost doubled and the taxon sampling has broadened. Here we add 14 new estimates from eight genera of freshwater cyclopoids that vary from 0.2 to 6.6 pg of DNA per nucleus in the soma; all except one are 2.0 pg DNA per nucleus or smaller. This new sample adds to the pattern of genome size in copepods and is remarkably similar to the distribution on which the original hypothesis was based, as well as those of subsequently published estimates. Embryonic chromatin diminution, during which large portions of DNA are excised from the presomatic cell lineage, is reported in Paracyclops affinis (G.O. Sars, 1863). This diminution results in a somatic genome that is one half the size of the germline genome. When the sizes of the germline genomes carried in presomatic cells of cyclopoid species that possess chromatin diminution are considered, the prediminuted germline genome sizes of cyclopoid embryos overlap with the distribution of calanoid somatic genome sizes, supporting the hypothesis that chromatin diminution has functioned as a mechanism to constrain somatic nuclear DNA content in cyclopoid copepods. Geographically based variation in genome size among populations is also reviewed.

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