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Scientific Name: Thermocyclops inversus Kiefer, 1936

Synonym: Mesocyclops inversus (Kiefer, 1936) (Currently unaccepted)

English Name: Water Flea
Local/Bangla Name: Pani Poca (পানি পোকা)
Zooplankton : Thermocyclops inversus

Photo: El Colegio de la Frontera Sur (GBIF)

Classification:
Kingdom: Animalia
Phylum: Arthropoda
Class: Copepoda
Order: Cyclopoida
Family: Cyclopidae
Description:
The organism has an elongated body with a triangular head, and the metasome and urosome are separated by a distinct articulation. The second and third metasomal segments are nearly equal in size, with the metasome being approximately double the size of the urosome. The antennule is 11-segmented, while the uniramous antennae are symmetrical and four-segmented. The second segment of the fifth leg bears an apical or subapical inner spine. There is no hyaline plate or unnotched hyaline plate on the last segment of the first antennule. The inner and outer terminal spines of the fourth leg are nearly equal in length, and small smooth prominences are present on each side of the connecting plate of the fourth leg. The coloration is whitish, with a total length ranging from about 0.63 to 0.98 mm and a breadth of 0.31 to 0.35 mm. The life cycle primarily consists of six different naupliar and five copepodid stages, with an incubation period ranging approximately from 12 hours to 5 days. When the newly hatched larvae leave the disintegrating ovisacs, the female releases another group of eggs from the reproductive duct, which are fertilized and retained in another pair of ovisacs. Each female may produce 7 to 13 pairs of ovisacs at intervals of 1 to 6 days, all resulting from sperm retained from a single copulation. The eggs hatch into small, compact, and active nauplius larvae, with no external segmentations present in the newly hatched nauplius larva. After feeding, the larvae molt and reach the nauplius II stage. Remarkable changes are observed during the molt to the copepodid stage, closely resembling the adult. The adults are free-living.
Habitat & Distribution in Bangladesh:
Commonly found in the rivers of Bangladesh.
Environment:
Freshwater
Other References:

Ahmed ATA, Kabir SMH, Ahmad M, Rahman AKA, Haque EU, Ahmed ZU, Begum ZNT, Hassan MA, Khondker M (eds.) (2008) Encyclopedia of Flora and Fauna of Bangladesh, Vol. 18. Part II. Arthropoda: Crustacea. Asiatic Society of Bangladesh, Dhaka, 226 pp

DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
Global IUCN conservation status:
Other Information