Description
Aeglids resemble squat lobsters in that the abdomen is partly tucked under the thorax. The notable sexual dimorphism in the abdomen is related to the behaviour of carrying fertilised eggs on the pleopods. The carapace length of the largest species may approach , but most are considerably smaller. Aeglids are omnivore, omnivorous, preferring plant matter, but also eating adult insects, Mollusca, molluscs, fish and fly larvae. The internal anatomy has been described for ''Aegla cholchol'' and generally resembles that of other anomurans, particularly Galatheoidea, galatheoid squat lobsters. The Morphology (biology), morphology of the antennal gland bladder differs from that in other anomurans in having a twisted tubular structure which was interpreted as an adaption to the freshwater lifestyle.Life cycle
Mating is preceded by a period of courtship, and does not coincide with ecdysis, moulting, as it does in many other Decapoda, decapods. The egg (biology), eggs of aeglids hatch as Juvenile (organism), juveniles which closely resemble the adults. They are cared for by their parents and live at the bottom of the body of water.Extant taxa
''Aegla'', the only Extant taxon, extant genus in the family, contains around 74 described extant species. Of the 63 species and subspecies described by 2008, two are found in lakes, four in Stygofauna, caves, and the remaining 57 are found mainly in rivers. 42 species are found in Brazil, all restricted to the country's South Region, Brazil, southern and Southeast Region, Brazil, southeastern regions (Rio Grande do Sul alone is home to 24). Other countries with species are Argentina, Bolivia, Chile, Paraguay and Uruguay. More than a third of the species are considered Threatened species, threatened, and in Brazil alone 26 species are officially recognized as threatened, including 8 critically endangered.Species
This list contains all the described species : *''Aegla abtao'' Schmitt, 1942 *''Aegla affinis'' Schmitt, 1942 *''Aegla alacalufi'' Jara & López, 1981 *''Aegla araucaniensis'' Jara, 1980 *''Aegla bahamondei'' Jara, 1982 *''Aegla brevipalma'' Bond-Buckup & Santos ''in'' Santos ''et al.'', 2012 *''Aegla camargoi'' Buckup & Rossi, 1977 *''Aegla castro'' Schmitt, 1942 *''Aegla cavernicola'' Türkay, 1972 *''Aegla cholchol'' Jara & Palacios, 1999 *''Aegla concepcionensis'' Schmitt, 1942 *''Aegla denticulata'' Nicolet, 1849 *''Aegla expansa'' Jara, 1992 *''Aegla franca'' Schmitt, 1942 *''Aegla franciscana'' Buckup & Rossi, 1977 *''Aegla georginae'' Santos & Jara ''in'' Santos ''et al.'', 2013 *''Aegla grisella'' Bond-Buckup & Buckup, 1994 *''Aegla hueicollensis'' Jara & Palacios, 1999 *''Aegla humahuaca'' Schmitt, 1942 *''Aegla inconspicua'' Bond-Buckup & Buckup, 1994 *''Aegla inermis'' Bond-Buckup & Buckup, 1994 *''Aegla intercalata'' Bond-Buckup & Buckup, 1994 *''Aegla intermedia'' Girard, 1855 *''Aegla itacolomiensis'' Bond-Buckup & Buckup, 1994 *''Aegla jarai'' Bond-Buckup & Buckup, 1994 *''Aegla jujuyana'' Schmitt, 1942 *''Aegla laevis'' (Latreille, 1818) *''Aegla lata'' Bond-Buckup & Buckup, 1994 *''Aegla leachi'' Bond-Buckup & Buckup ''in'' Santos ''et al.'', 2012 *''Aegla leptochela'' Bond-Buckup & Buckup, 1994 *''Aegla leptodactyla'' Buckup & Rossi, 1977 *''Aegla ligulata'' Bond-Buckup & Buckup, 1994 *''Aegla longirostri'' Bond-Buckup & Buckup, 1994 *''Aegla ludwigi'' Santos & Jara ''in'' Santos ''et al.'', 2013 *''Aegla manni'' Jara, 1980 *''Aegla marginata'' Bond-Buckup & Buckup, 1994 *''Aegla manuniflata'' Bond-Buckup & Santos ''in'' Santos ''et al.'', 2009 *''Aegla microphthalma'' Bond-Buckup & Buckup, 1994 *''Aegla muelleri'' Bond-Buckup & Buckup ''in'' Bond-Buckup ''et al.'', 2010 *''Aegla neuquensis'' Schmitt, 1942 *''Aegla oblata'' Bond-Buckup & Santos ''in'' Santos ''et al.'', 2012 *''Aegla obstipa'' Bond-Buckup & Buckup, 1994 *''Aegla occidentalis'' Jara, Pérez-Losada & Keith A. Crandall, Crandall, 2003 *''Aegla odebrechtii'' Müller, 1876 *''Aegla papudo'' Schmitt, 1942 *''Aegla parana'' Schmitt, 1942 *''Aegla parva'' Bond-Buckup & Buckup, 1994 *''Aegla paulensis'' Schmitt, 1942 *''Aegla perobae'' Hebling & Rodrigues, 1977 *''Aegla pewenchae'' Jara, 1994 *''Aegla plana'' Buckup & Rossi, 1977 *''Aegla platensis'' Schmitt, 1942 *''Aegla pomerana'' Bond-Buckup & Buckup ''in'' Bond-Buckup ''et al.'', 2010 *''Aegla prado'' Schmitt, 1942 *''Aegla renana'' Bond-Buckup & Santos ''in'' Santos ''et al.'', 2010 *''Aegla ringueleti'' Bond-Buckup & Buckup, 1994 *''Aegla riolimayana'' Schmitt, 1942 *''Aegla rossiana'' Bond-Buckup & Buckup, 1994 *''Aegla rostrata'' Jara, 1977 *''Aegla saltensis'' Bond-Buckup & Jara ''in'' Bond-Buckup ''et al.'', 2010 *''Aegla sanlorenzo'' Schmitt, 1942 *''Aegla scamosa'' Ringuelet, 1948 *''Aegla schmitti'' Hobbs III, 1979 *''Aegla septentrionalis'' Bond-Buckup & Buckup, 1994 *''Aegla serrana'' Buckup & Rossi, 1977 *''Aegla singularis'' Ringuelet, 1948 *''Aegla spectabilis'' Jara, 1986 *''Aegla spinipalma'' Bond-Buckup & Buckup, 1994 *''Aegla spinosa'' Bond-Buckup & Buckup, 1994 *''Aegla strinatii'' Türkay, 1972 *''Aegla talcahuano'' Schmitt, 1942 *''Aegla uruguayana'' Schmitt, 1942 *''Aegla violacea'' Bond-Buckup & Buckup, 1994Fossil taxa
''Haumuriaegla''
''Haumuriaegla glaessneri'' is a species known only from fossils of Haumurian age (Late Cretaceous) found near Cheviot, New Zealand. At the time of its discovery, ''Haumuriaegla'' was the only known fossil from the family and the only marine member.''Protaegla''
''Protaegla miniscula'' was discovered in rocks of Albian age from the Tlayúa Formation, near Tepexi de Rodríguez (municipality), Tepexi de Rodríguez, Mexico.Evolution
The family as a whole is thought to have originated around 75 million years ago in a marine environment, and then entered South America from the Pacific Ocean, Pacific side during the Oligocene.References
External links
* {{Taxonbar, from=Q4687643 Anomura Freshwater crustaceans of South America Extant Albian first appearances Decapod families Taxa named by James Dwight Dana