Egg masses and larval development of the Antarctic cephalaspidean snail Waegelea antarctica (Cephalaspidea: Antarctophilinidae), with notes on egg masses of the related Antarctophiline alata
Egg masses and larval development of the Antarctic cephalaspidean snail Waegelea antarctica (Cephalaspidea: Antarctophilinidae), with notes on egg masses of the related Antarctophiline alata
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南极头螺蜗牛 Waegelea antarctica(头螺总科:Antarctophilinidae)的卵块和幼虫发育,以及相关 Antarctophiline alata 卵块的注释
DOI:
10.1093/mollus/eyab027
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发表时间:
2021
影响因子:
1.2
通讯作者:
Marko, P B
中科院分区:
文献类型:
--
作者:
Moran, A L;Toh, M-W A;Lobert, G T;Ely, T;Marko, P B
We describe, for the first time, egg masses and larval developmental mode of a recently described Antarctic philinoid snail,Waegelea antarctica. Egg masses resembled the gelatinous, attached masses of many temperate philinoid species and contained very large offspring that hatched as developmentally advanced veligers with many juvenile features. Like other Antarctic heterobranch egg masses, development in the masses ofW. antarcticaappeared to be largely synchronous despite low internal oxygen levels. Hatched larvae could both swim and crawl, and we did not observe metamorphosis over several days. Molecular barcoding using cytochromecoxidase subunit I (COI) showed an almost perfect (<0.002% difference) match between our specimens from McMurdo Sound in the Ross Sea and a single sequence from a specimen collected >8,000 km away in the Weddell Sea, suggesting either high realized larval dispersal or a recent range expansion. We also describe the egg mass of the relatedAntarctophiline alata(identified using COI barcoding) from the Ross Sea, which differed from published descriptions in having considerably smaller embryos.
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DOI:
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