Laboratory-model-organism
Guides
Cardiocondyla obscurior
Arboreal Sneaking Ant
Cardiocondyla obscurior is a small myrmicine ant with Indomalayan origins that has achieved cosmopolitan distribution as a tramp species. It exhibits distinctive reproductive traits including male polyphenism with both winged and wingless male morphs, and a unique aging strategy termed 'continuusparity' where queens maintain continuous reproduction with a fitness peak late in life. The species is primarily arboreal, nesting in plant cavities of low vegetation, and has been introduced to numerous regions including the Americas, Europe, and Asia.
Procambarus clarkii
red swamp crayfish, Louisiana crawfish, mudbug, red swamp crawfish
Procambarus clarkii is a freshwater crayfish native to northern Mexico and the south-central United States, particularly the Mississippi Basin and Gulf Coast. It is highly adaptable to warm, slow-moving freshwater habitats including marshes, rice paddies, and irrigation systems. The species tolerates low dissolved oxygen, moderate salinity, and dry spells up to four months. It has been introduced globally and is a significant invasive pest in Europe, Africa, and Asia, where it outcompetes native crayfish and vectors crayfish plague. It is also the foundation of a major aquaculture industry, particularly in Louisiana and China.