Descriptions of rajid egg cases from southeastern Australian waters. M. A. Treloar L. J. B. Laurenson J. D. Stevens Zootaxa 2006 1231 53 68 FJ6 30475 Rajidae 57 family  Identification key for rajid egg cases collected from skates in southeastern Australian waters 1a Egg case small, ≤ 85 mm BL ........................................................................................ 2 1b Egg case medium to large, ≥ 90 mm BL ....................................................................... 5 2a Lateral keel absent; dorsal and/or ventral surfaces of egg case covered with dense fibroids .......................................................................................................................... 3 2b Lateral keel present; dorsal and ventral surfaces of egg case not covered with dense fibroids ....................................................................................... Dipturus sp. A(Fig. 3) 3a Posterior horns shorter than body width; egg case> 40 mm BL .................................. 4 3b Posterior horns at least 2.7 times maximum body width; egg case ≤ 40 mm BL ......... ................................................................................................. Pavoraja nitida(Fig. 10) 4a Ventral surface of egg case covered with dense fibroids; egg case narrow at posterior end; posterior apron 1.5 times length of anterior apron ............. Dipturus cerva(Fig. 6) 4b Ventral surface of egg case not covered with dense fibroids; posterior apron length almost 3 times the length of anterior apron .......................... Dipturus lemprieri(Fig. 8) 5a Dorsal and ventral surfaces of egg case covered with dense fibroids; posterior horns shorter than body width ................................................................................................. 6 5b Dorsal and ventral surfaces of egg case not covered with dense fibroids; posterior horns at least 1.4 times maximum body width ........... Amblyraja cf hyperborea(Fig. 2) 6a Lateral keel prominent,> 18% of maximum body width; aprons fringed ...................... ................................................................................................ Dipturus whitleyi(Fig. 9) 6b Lateral keel discrete, <14% of maximum body width; aprons not fringed .................. 7 7a Egg case large, ≥ 160 mm BL; posterior horns enclosed in apron .................................. ............................................................................................ Dipturus cf gudgeri(Fig. 7) 7b Egg case medium, ≤ 120 mm BL; posterior horns extending out of apron .................... ..................................................................................................... Dipturus sp. B(Fig. 4) Note: Dipturus sp. Lwas not included in this key as only partially formed egg cases were examined.