Colpocyclops longispinosus (Monchenko, 1977)

Colpocyclops longispinosus imageSynonyms: Halicyclops longispinosus Monchenko.

Common names: None.

Order (Scientific): CYCLOPOIDA.

Family (Scientific): CYCLOPIDAE.

Taxonomic descriptions: The most outstanding features relate to the structure and armature of the mouth parts, which are the most modified among Cyclopidae and coincide with those of the type species of the genus (Cyclopidae duclis). Total female length 700-730 mkm, male 510-530 mkm.

Colpocyclops longispinosus arealIUCN Status:
    World level:
    Black Sea Regional level:
    Subregion level: EN (Ukrainian sector)

Distribution: The lower part of the Dniester river liman and central part of the Dnieper-Boug river liman. Endemic to these two river limans. Its genus is allied to the typical Ponto-Caspian genus Smirnoviella. This genus relation, the actual area and haloparthy provide a reason to consider it a member of the Ponto-Caspian zoogeographic complex and which arose in one of the basins that preceded the Black Sea.

Habitats type, Critical habitats, Limiting factors: A meiobentic bottom-dwelling copepod inhabiting the sands and mud sands at different depths of the oligohaline and meiomesohaline aesturine water-bodies. Found at a salinity of 1.8-5.6 ppt.

Biology: A polycyclic development during the warm season of the year. The prehensile type of the mouth parts structure suggests the commensal mode of life of some invertebrates.

Population trends: Decline in population numbers during the last 10-15 years of up to 50-60%.

Threats: Pollution of the river limans and eutrophication causing hypoxia in the bottom layer of water.

Conservation measures taken: None.

Conservation measures proposed: Enter in the Black Sea Red Data Book. A reduction of Dniester and Dnieper-Boug basin pollution.

References:

  1. Monchenko, V.I., 1974a. A new representative of the genus Halicyclops (Crustacea, Copepoda) from the Dnieper-Boug river liman. Vestnik zool., v.8, N 3: 47-52 (in Russian with English Abstract).
  2. Monchenko, V.I., 1974b. Gnathostomata Cyclopoida, Cyclopidae. Fauna of the Ukraine, v.27, N 3, 437 p. "Naukova Dumka", Kiev.
  3. Monchenko, V.I., 1978. The allocation of the Halicyclops longispinosus to the genus Colpocyclops (Crutasera, Copepoda) and the first description of its males. Vestnik zool., v.12, N 5: 68-72 (in Russian with English Abstract).

Compiled by: V.Monchenko.