| Triops cancriformis (Bosc, 1801)|
Main synonym = Apus cancriformis Bosc, 1801
| Taxonomical Classification: Animalia / Arthropoda / Crustaceae / Notostraca / Triopsidae |
| Tadpole shrimp Maltese name not known|
| Further Information: |
This species is considered to be one of the oldest living species on the planet at around 200 million years old. Fossils of this species from the Upper Triassic (Norian) period appear virtually unchanged compared to modern day members of the species.
Triops cancriformis has a very fast life cycle, and individuals become mature in about two weeks after hatching. Their populations can be gonochoric, hermaphroditic or androdioecious. The latter is a very rare reproductive mode in animals, in which populations are made of hermaphrodites, with a small proportion of males. Due to this lack of males, early researchers thought Triops were parthenogenetic. The presence of testicular lobes scattered amongst their ovaries confirmed they were in fact hermaphroditic. Fertilized females of hermaphrodites produce diapausing eggs or cysts, able to survive decades in the sediment of the ponds and lakes they inhabit. These eggs are resistant to drought and temperature extremes.
In 1801, Louis Augustin Guillaume Bosc made the first officially recognised species description of Triops cancriformis. He named this species Apus cancriformis. Other authors used the name Apus cancriformis over the years but often with the wrong original author of this name. In 1958, the International Commission on Zoological Nomenclature (ICZN) recognised the name Triops cancriformis (Bosc, 1801â€“1802) (ICZN name no. 1476) as officially the oldest. They also recognised the genus name Triops Schrank instead of Apus. They followed Longhurst in these decisions
Information taken from www.WikiPedia.com
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