Egg capsules, eggs and embryos of the southwestern Atlantic gastropod Coronium coronatum (Gastropoda: Muricidae) |
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| Authors: | Pastorino, Guido Penchaszadeh, Pablo E. Scarabino, Fabrizio |
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| Affiliation: | 1 Museo Argentino de Ciencias Naturales, Av. Ángel Gallardo 470 3° piso lab. 80, C1405DJR Buenos Aires, Argentina; 2 Depto. Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina; and 3 Museo Nacional de Historia Natural y Antropología, C. C. 399 – C. P. 11.000, Montevideo, Uruguay |
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| Abstract: | The egg capsules, eggs and embryos of the muricid gastropodCoronium coronatum are described for the first time. Capsulesare sessile, bulliform, semi-circular, with a plug in the dorsalcenter. Sutures split the capsule into two asymmetrical halves.Recently laid capsules showed the presence of 3639 (n = 2) uncleavednurse eggs with a diameter of 180210 µm (mean= 197.4 ± 8.9). The number of early embryos was 911.The size of the embryos was 320 x 320 to 820880 µm.Nine pre-hatching embryos of 3.94 mm (n = 8, SD = 0.32)were found inside the older capsule. SEM illustrations of embryosand radulae are provided. Comparison of shell and radula ofembryos with the protoconch and radulae of adults of C. coronatumrevealed that the capsule belongs to this species. (Received 18 March 2006; accepted 10 October 2006) |
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