T. longicaudatus is your “garden variety” triops. This is the species that gets sold throughout the world in triops kits. It is the most studied of all the Triops and Lepidurus species and, hence, the one we know the most about.* As mentioned elsewhere, because it is studied more than any other species genetic data suggest that there are probably several if not dozens of subspecies currently lumped together as a single macrospecies. At the level of gross anatomy, there are two distinct morphs: a long form and a short form which can be distinguished by the number of segments/tail length not coverd by the carapace.
- North America
- United States (also in Hawaii but not Alaska)
- Central America
- South America
- West Indies
- Galapogos Islands
- New Caledonia
Temporary waters (a common inhabitant of rice fields in the U.S. and Japan)
Minimum Temp: 18°C (60°F) Maximum Temp: 30°C (86°F)
35 – 44, 5 – 12 apodous in females, 10 – 14 apodous in males
54 – 66
Second maxilla is absent
Bisexual (with both male and female biased populations known), unisexual, and hermaphroditic
Approximately 80-90 days. Usually half this in an Aquarium.