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VeselýMilan, BatistaAbel. 2021: 巴拿马东部发现斑蟾属Atelopus 一新种(两栖纲Amphibia蟾蜍科Bufonidae). 动物学研究, 42(3): 272-279. DOI: 10.24272/j.issn.2095-8137.2020.319
引用本文: VeselýMilan, BatistaAbel. 2021: 巴拿马东部发现斑蟾属Atelopus 一新种(两栖纲Amphibia蟾蜍科Bufonidae). 动物学研究, 42(3): 272-279. DOI: 10.24272/j.issn.2095-8137.2020.319
Milan Veselý, Abel Batista. 2021: A new species of Atelopus (Amphibia: Bufonidae) from eastern Panama. Zoological Research, 42(3): 272-279. DOI: 10.24272/j.issn.2095-8137.2020.319
Citation: Milan Veselý, Abel Batista. 2021: A new species of Atelopus (Amphibia: Bufonidae) from eastern Panama. Zoological Research, 42(3): 272-279. DOI: 10.24272/j.issn.2095-8137.2020.319

巴拿马东部发现斑蟾属Atelopus 一新种(两栖纲Amphibia蟾蜍科Bufonidae)

A new species of Atelopus (Amphibia: Bufonidae) from eastern Panama

  • 摘要: 本文结合分子、形态和鸣声数据,描述巴拿马东部斑蟾属Atelopus一新种,即A. fronterizo sp. nov. 。新种可依据以下形态特征与同属近缘物种进行区分:1)第一指微弱;2)雌性SVL 35.1–50.1mm(n=13),HW/SVL 0.23–0.34 (n=59), EYND/HW 0.27–0.39 (n=60), TIBL/SVL 0.41–0.56 (n=58), 以及 HAL/SVL 0.22–0.28 (n=49);3)背部底色黄色或绿色,伴有密集的深橄榄色横纹或斑块;4)求偶鸣声长176–235ms,伴有19–34个脉冲,平均脉冲重复率为131.69脉冲/秒,鸣声主频率2422.50–2606.50Hz。新种嵌于中美洲的斑蟾支系中,其与近缘种A. certusA. glyphus在16S和COI线粒体片段上的最小K2P遗传距离均大于2.6%和4.9%。依据16S和COI片段构建的贝叶斯和极大似然法系统演化关系一致,节点支持率较高。依据上述线粒体片段重建的单倍型网络也支持新种自成一支,种内突变步数较低(16S单倍型1-4步,COI单倍型1步),而相比近缘种而言,最低突变步数则普遍较高,其中16S单倍型较A. certus为9步,COI单倍型较A. glyphus为28步。

     

    Abstract: A new species of the genus Atelopus, Atelopus fronterizo sp. nov. , from eastern Panama is described herein based on molecular, morphological, and bioacoustic evidence. The new species can be distinguished from its congeners occurring in the region by a combination of the following characters: (1) phalangeal reduction in thumb; (2) SVL (females only) (35.1–50.1; n=13), HW/SVL (0.23–0.34; n=59), EYND/HW (0.27–0.39; n=60), TIBL/SVL (0.41–0.56; n=58), and HAL/SVL (0.22–0.28; n=49); (3) dorsal color pattern with green or yellow background and extensive dark olive blotches forming transversal bands or mottling; (4) advertisement call duration 176–235 ms with 19–34 pulses, average pulse rate 131.69 pulses/s, and dominant frequency 2 422.50–2 606.50 Hz. The new species is nested within the Central American clade of Atelopus. The minimum Kimura‐2‐parameter (K2P) genetic divergence between Atelopus fronterizo sp. nov. and its most phylogenetically similar congeners (A. certus and A. glyphus) is >2.6% for 16S and >4.9% for COI (Table 1). The phylogenetic relationship is strongly supported by ultrafast bootstrap values for the maximum-likelihood trees of both genetic markers (16S, 96; COI, 100, Figure 1A). Bayesian analysis of the concatenated sequences resulted in a tree with similar topology and high posterior probability support (0.99; Supplementary Figure S1). In addition, haplotype networks inferred from COI and 16S (Supplementary Figure S2) showed a well-separated clade containing the new species (two for COI, four for 16S). The number of mutational steps between haplotypes for the new species samples is very low (1–4 in 16S; one in COI), and the minimum number of mutational steps from the nearest species is nine for 16S (distance to A. certus) and 28 for COI (distance to A. glyphus).

     

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