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Dates and Facts

T. cancriformis femaleTriops cancriformis (BOSC, 1801; latin, formed like crab , cancer:crab forma:form) counted to the oldest extant species in the world. The opinion of many researchers was that ancestors of today's Triops cancriformis already have populated the earth 220 million years ago- these animals were similar to today's Triops cancriformis, but were smaller and were called Triops cancriformis minor. The most recent findings say Triops cancriformis can not be related with Triops cancriformis minor (see Article Triops cancriformis minor). It is not clear yet, what this means for the expection georgraphic rangeTriops cancriformis was the oldest unextinct species.Probably it has to cede its title to some conchostraca species. Fact is that T.cancriformis is not related to T. cancriformis minor.
Unextinct members of this species live in whole Eurasia (Europe and Asia) and North Africa. There are different variations of color.
There used to be the sub-species Triops cancriformis mauritanicus and Triops cancriformis simplex , but this is now outdated. Triops mauritanicus is now a separate species, so Triops cancriformis cancriformis is the only subspecies of Triops cancriformis (so far) . This may change in future, because scientists currently go through all species with a fine-tooth comb.


Triops cancriformis is always autogam, that means that male are very rare, so the female is able to fertilize itself. The species is often found in cooler areas, where the pools dry out not as fast as in desert regions. This means the Triops has more time to develop.
cancriformis count as low-growing and sedate. T. cancriformis has the highest life expectancy, because of their slow metabolism. The maximum expected age is about 120 days. Because Triops never stop growing, the maximum of length is up to 10cm/3,9inch.
Triops cancriformis often have a hefty skull plate and a relatively short tail, but a very long furca. They usually are earth-colored, depending on ancestry they're darker or lighter brown, sometimes even speckled.



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