Undinula postero-lateral angles(PLAs) pointed U. vulgaris PLAs bifurcate P2 Re notch P5 (♂) right leg short left leg without Ri, Re with a vermiform U. vulgaris
Undinula postero-lateral angles(PLAs) pointed U. vulgaris PLAs bifurcate P2 Re notch P5 (♂) right leg short left leg without Ri, Re with a vermiform U. vulgaris
2.1.1.2 Family Eucalanidae body large, prosome elongated, head pointed triangular, Ab ♀2-3 ♂3-4 P 5 rudimentary, ♀lacking ♂left leg long Eucalanus E. subcrassus ♀genital somite longer than wide ♂ P5 right leg lacking
2.1.1.2 Family Eucalanidae body large, prosome elongated, head pointed triangular, Ab ♀2-3 ♂3-4 P 5 rudimentary, ♀lacking ♂left leg long Eucalanus E. subcrassus ♀genital somite longer than wide ♂ P5 right leg lacking
Rhincalanus forehead conical process P5 ♀ ♂ uniramous except ♂ left leg biramous R. cornutus head anchorlike R. nasutus head conical R. rostrifrons
Rhincalanus forehead conical process P5 ♀ ♂ uniramous except ♂ left leg biramous R. cornutus head anchorlike R. nasutus head conical R. rostrifrons
2.1.1.3 Family Paracalanidae small form, Ab ♀2-4 ♂ 5 P 5 rudimentary, uniramous Paracalanus P2-4 Re 3 denticulate P. parvus ♀ P 4 second segment without spinules on posterior surface
2.1.1.3 Family Paracalanidae small form, Ab ♀2-4 ♂ 5 P 5 rudimentary, uniramous Paracalanus P2-4 Re 3 denticulate P. parvus ♀ P 4 second segment without spinules on posterior surface
2.1.1.4 Family Euchaetidae large in size, PLAs rounded or pointed, Ab ♀ 4 ♂5, ♀genital prominent, P 5 ♀lacking, ♂well developed Euchaeta E. marina P 5 ♂left leg spade-like process E. concinna ♀genital somite with protuberance P 5 ♂left leg lamellate-like process
2.1.1.4 Family Euchaetidae large in size, PLAs rounded or pointed, Ab ♀ 4 ♂5, ♀genital prominent, P 5 ♀lacking, ♂well developed Euchaeta E. marina P 5 ♂left leg spade-like process E. concinna ♀genital somite with protuberance P 5 ♂left leg lamellate-like process