雄性 Temminck 穿山甲 Smutsia temminckii (Smuts, 1832) 的总生殖形态。

IF 0.8 4区 农林科学 Q4 ANATOMY & MORPHOLOGY Anatomia Histologia Embryologia Pub Date : 2024-06-29 DOI:10.1111/ahe.13084
Lauren Nicole Tink, Raymond Jansen, Christine Steyn
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摘要

Temminck's 穿山甲(Smutsia temminckii)是全球八种穿山甲之一,也是非洲南部唯一的穿山甲。一直以来,穿山甲都无法在人工饲养条件下成功繁殖,部分原因可能是对所有八个物种的穿山甲生殖系统(解剖学、生理学和生物学)缺乏了解和认识。这项原创性研究描述了所调查的三只成年雄性坦明克穿山甲的大体解剖结构。雄性滕敏克穿山甲的阴茎短小,呈圆锥形,有阴囊(内部)睾丸,与土豚(Orycteropus sp.)和食蚁兽(亚目:Vermilingua)等许多食肉哺乳动物相似。不过,Temminck穿山甲的阴茎朝向有所不同,它朝向头颅中央,而巨食蚁兽则朝向尾部。睾丸双侧扁平,呈拉长的椭圆形,与土豚相似。雄性滕敏克穿山甲生殖道的特殊特征被认为是对其特殊生活方式的适应,因为雄性滕敏克穿山甲的特征表明其适应较低的基础代谢率和体温,以及卷成球状的防御机制。我们的研究表明,雄性滕敏克穿山甲的生殖解剖结构与与穿山甲有相同觅食活动的穴居类和土豚最为相似和可比,而雄性形态与系统发育上密切相关的食肉目动物没有可比性。
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The gross reproductive morphology of the male Temminck's pangolin Smutsia temminckii (Smuts, 1832)

The Temminck's pangolin (Smutsia temminckii) is one of eight pangolin species worldwide and the only pangolin present in southern Africa. Historically, pangolins have not been able to reproduce successfully in captivity and this may be in part due to the lack of knowledge and understanding with regards to the pangolin reproductive system (anatomy, physiology, biology) in all eight species. This original study describes the gross anatomy of the male Temminck's pangolin from three adult individuals investigated. The male Temminck's pangolin presented a short, conical penis with ascrotal (internal) testes, similar to many other myrmecophagous mammals such as the aardvark (Orycteropus sp.) and anteaters (suborder: Vermilingua). However, the orientation of the penis of the Temminck's pangolin differed in that it was oriented cranioventrally, in contrast to the caudal orientation of the giant anteater. The testes were found to be bilaterally flattened with an elongate oval shape, similar to the aardvark. The specific characteristics of the reproductive tract of the male Temminck's pangolins are thought to be adaptations to their peculiar lifestyle as the male portrays characteristics that indicate adaptation to a lower basal metabolic rate and body temperature as well as to their defensive mechanism of rolling up into a ball. Our study suggests the male Temminck's pangolin reproductive anatomy is most similar and comparable to the Xenarthrans and the aardvark that display the same fossorial activities as pangolins, and the male morphology is not comparable to the phylogenetically closely-related Carnivora.

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来源期刊
Anatomia Histologia Embryologia
Anatomia Histologia Embryologia ANATOMY & MORPHOLOGY-VETERINARY SCIENCES
CiteScore
1.90
自引率
11.10%
发文量
115
审稿时长
18-36 weeks
期刊介绍: Anatomia, Histologia, Embryologia is a premier international forum for the latest research on descriptive, applied and clinical anatomy, histology, embryology, and related fields. Special emphasis is placed on the links between animal morphology and veterinary and experimental medicine, consequently studies on clinically relevant species will be given priority. The editors welcome papers on medical imaging and anatomical techniques. The journal is of vital interest to clinicians, zoologists, obstetricians, and researchers working in biotechnology. Contributions include reviews, original research articles, short communications and book reviews.
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