大鼻扇形虫单卵黄双胚首次报道，尖尖合翅虫1877 （rajiforma, Arhynchobatidae）

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science Pub Date : 2025-04-23 DOI:10.1016/j.rsma.2025.104206

Paola Vivian-Vásquez , Vinicius Domingues , Maria Cristina Oddone

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引用次数: 0

摘要

本研究报告了在其自然栖息地发现的尖锐症状单卵黄双胞胎的第一例。虽然该物种的胚胎发育通常导致每个卵囊有一个胚胎，但发现两个胚胎共用一个卵黄囊。卵囊和胚的形态特征在正常范围内，但卵黄柄的大小和厚度存在差异。该病例与其他报道的鱼类和板鳃类同卵双胞胎进行了比较，但确切原因尚不清楚。讨论了潜在的环境或进化影响。

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First report of monovitellinic twin embryos of Bignose fanskate, Symterygia acuta Garman 1877 (Rajiformes, Arhynchobatidae)

This study reports the first case of monovitellinic twins in Sympterygia acuta, found in its natural habitat. While embryonic development in this species typically results in a single embryo per egg capsule, two embryos were found sharing a single yolk sac. The egg capsule and embryos exhibited morphological characteristics within the normal range for the species, though differences in the size and thickness of the yolk stalk were noted. This case is compared to other reports of monozygotic twins in fish and elasmobranchs, but the exact causes remain unknown. Potential environmental or evolutionary influences are discussed.

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来源期刊

Regional Studies in Marine Science Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

3.90

自引率

4.80%

发文量

336

审稿时长

69 days

期刊介绍： REGIONAL STUDIES IN MARINE SCIENCE will publish scientifically sound papers on regional aspects of maritime and marine resources in estuaries, coastal zones, continental shelf, the seas and oceans.