TABLE 1. Main differences between Acroperus harpae and Acroperus angustatus.
Character Acroperus harpae Acroperus angustatus
Denticles on postero-ventral corner of valves with narrow bases, spaced with broad bases, saw-like, clustered together
Antenna:
length about 1/4 of body length about 1/5 of body length
length of branches exopodite much longer than endopodite branches of same length
seta on basal segment of exopodite less than 2/3 length of middle segment as long as middle segment
seta on middle segment of exopodite 1.5 times longer than apical segment 2.5 times longer than apical segment
apical setae of exopodite one seta much thicker than others all setae of same thickness
Scrapers 6-7 of limb II similar to other scrapers more robust than other scrapers
Limb V exopodite Incursion between lobes broad, rectangular incursion between lobes as acute angle
Male postabdomen
shape narrowing in distal part rectangular
postabdominal claw longer than preanal portion of postabdomen shorter than preanal portion of postabdomen
persistent identifier: http://table.plazi.org/id/DF5F6626AB4CFF9D5596BB12D16BFC67
other formats: Plain XML JSON CSV TSV
Published as part of Sinev, Artem Y. (2009). Discrimination between two sibling species of Acroperus (Baird, 1843) from the Palearctic (Cladocera: Anomopoda: Chydoridae). Zootaxa 2176: 1-21. DOI: 10.5281/zenodo.189352 on page 17