Population genetic structure of a California endemic branchiopod
, Branchinecta sandiegoensis.
And I realized that this brain actually comprises three successive neuropils in the optic regions, which is a trait of malacostracans, not branchiopods
," he said.
Co-occurrence of branchiopods
in ephemeral pools is not unusual.
After the first subsequent rains, the invertebrate fauna in these particular pans consisted of many "typical" temporary pan invertebrates, including various large branchiopods
like: Anostraca (Fairy shrimp), Conchostraca (Clam shrimp), and Notostraca (Tadpole shrimp).
Low vegetation (Xyridacaea, Echinocaulaceae) in the dry pools fix the sand, helping to maintain a branchiopod
eggbank (Figure 2).
We have also obtained partial sequences of phenoloxidases from the branchiopods
Triops longicaudatus and Artemia franciscana, crustaceans that synthesize extracellular hemoglobin for oxygen transport.
Structural studies of a branchiopod
crustacean (Lepidurus bilobatus) extracellular hemoglobin.
Smith, unpub.) Surprisingly, three genes that define the identity of diverse trunk segments in insects (Antp, Ubx, and abd-A) are all expressed throughout the thorax of the branchiopod
crustacean Artemia, but are not expressed in the postgenital abdomen (12).
Now we have shown that the heartbeat of the branchiopod
Triops longicaudatus is myogenic, and that the heart muscle acts as a diffuse pacemaker.
Tadpole shrimp (Triops longicaudatus LeConte) are primitive branchiopod
crustaceans that face extreme environmental conditions in the ephemeral desert pools that they inhabit.
The same can be found in crustacean lineages, as branchiopods
, ostracods, copepods, cirripeds, and decapods that lost HcA and presented Hb for handling oxygen (Ter-williger and Ryan, 2001).
Field evidence of dispersal of branchiopods
, ostracods and bryozoans by teal (Anas crecca) in the Camargue (southern France).