The mature yolk bodies of B. areolata are similar to those found in B. brandaris (Amor et al. 2004) and N. arthritica
cumingii (Chung et al. 2006), as they exhibit an electrondense core surrounded by a clear envelope. In addition, the
cortical granules in B. areolata was present in the vitellogenic oocytes as has been described for the primitive gastropods such as Patella spp. and H. pectunculus (Hodgson and Eckelbarger 2000), and Haliotis varia (Najmudeen
2008). In contrast, this structure was not found in B. naticoidea (Eckelbarger and Young 1997), B. brandaris (Amor
et al. 2004) and N. arthritica cumingii (Chung et al. 2006). The mature oocytes of B. areolata develop microvilli similar
to those found in Patella spp. and H. pectunculus (Hodgson and Eckelbarger 2000) and H. varia (Najmudeen 2008).
Apart from forming junctions with adjacent oocytes, microvilli help in absorption, transportation and secretion
of egg envelopes (Norrevang 1968; Wourms 1987). It is interesting to note, however, that not all gastropod oocytes
have microvilli, e.g. B. naticoidea (Eckelbarger and Young 1997) and N. arthritica cumingii (Chung et al. 2006). Exocytosis of material into the perivitelline space has been observed in bivalves (Pipe 1987; Eckelbarger and Young 1999). For the buccinid B. areolata, this is the first report of such a process and it should be further investigated.
The mature yolk bodies of B. areolata are similar to those found in B. brandaris (Amor et al. 2004) and N. arthriticacumingii (Chung et al. 2006), as they exhibit an electrondense core surrounded by a clear envelope. In addition, thecortical granules in B. areolata was present in the vitellogenic oocytes as has been described for the primitive gastropods such as Patella spp. and H. pectunculus (Hodgson and Eckelbarger 2000), and Haliotis varia (Najmudeen2008). In contrast, this structure was not found in B. naticoidea (Eckelbarger and Young 1997), B. brandaris (Amoret al. 2004) and N. arthritica cumingii (Chung et al. 2006). The mature oocytes of B. areolata develop microvilli similarto those found in Patella spp. and H. pectunculus (Hodgson and Eckelbarger 2000) and H. varia (Najmudeen 2008).Apart from forming junctions with adjacent oocytes, microvilli help in absorption, transportation and secretionof egg envelopes (Norrevang 1968; Wourms 1987). It is interesting to note, however, that not all gastropod oocyteshave microvilli, e.g. B. naticoidea (Eckelbarger and Young 1997) and N. arthritica cumingii (Chung et al. 2006). Exocytosis of material into the perivitelline space has been observed in bivalves (Pipe 1987; Eckelbarger and Young 1999). For the buccinid B. areolata, this is the first report of such a process and it should be further investigated.
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