Belongs within: Cladoceromorpha. The Gymnomera are a group of carnivorous water fleas in which the bivalved carapace is reduced to a small dorsal brood sac, and the phyllopodia are modified into rod-shaped jointed appendages (Ax 1999). Members include the raptorial genus Leptodora in which the body is elongate and all legs prehensile. Gymnomera [Cephalota] |… Continue reading Gymnomera


Belongs within: Cladoceromorpha.Contains: Chydoridae, Daphnia. The Anomopoda is the largest generally-recognised subgroup within the waterfleas (Cladocera). Members of this group have the first two pairs of trunk limbs modified into grasping structures. Most species have a pair of ejector hooks at the base of the first trunk limb that are used to expel detritus. Within… Continue reading Anomopoda


Belongs within: Allotriocarida.Contains: Calmanostraca, Diplostraca, Anostracina. The Branchiopoda are a morphologically diverse group of crustaceans with phyllopodous limbs, including the water fleas, fairy shrimp and tadpole shrimp. The majority of species are found in fresh or brackish waters though a smaller number have entered fully marine habitats. Within the Branchiopoda, a well-developed carapace is present… Continue reading Branchiopoda


Belongs within: Branchiopoda.Contains: Eosestheria, Spinicaudata, Cladoceromorpha. The Diplostraca is a clade of freshwater crustaceans with the body enclosed within a bivalved carapace. They have a fossil record extending back to the early Devonian (Briggs et al. 1993). The diplostracans have been divided in the past between the Cladocera (water fleas) and ‘Conchostraca’ (clam shrimps) with… Continue reading Diplostraca


Belongs within: Branchiopoda. Tadpole shrimps: living, not fossils Published 20 March 2021 The concept of a ‘living fossil’ has a fraught history. It tends to appear a lot in popular publications where it conveys a sense of drama and mystery to the organisms so described. In the actual scientific literature, however, it tends to be… Continue reading Calmanostraca


Belongs within: Diplostraca. The Spinicaudata are a group of clam shrimps characterised by the formation of clasps on the first and second pair of thoracopods of the males. In members of the modern family Limnadiidae, the antennules are two-segmented and the head bears an unpaired, often pedunculate frontal organ. <==Spinicaudata |–LeptestheriidaeWZK06 | |–Leptestheria compleximanusT06 |… Continue reading Spinicaudata


Belongs within: Anomopoda. The Chydoridae are a group of benthic cladocerans with setae on the endite of the second trunk limb modified for scraping algae. <==Chydoridae | i. s.: Rak obtususP05 | Australospilus elongatusPH10 | Alonella excisaPH10 | Celsinotum parooensisPH10 | Dadaya macrocopsPH10 | Ephemeroporus barroisiPH10 | Leberis diaphanusPH10 | Pseudomonospilus diporusPH10 | Karualona karuaPH10… Continue reading Chydoridae