Styracura pacifica

Styracura pacifica
保全状況評価
	VULNERABLE; (IUCN Red List Ver.3.1 (2001));
分類
学名
	Styracura pacifica; (Beebe & Tee-Van, 1941)

Styracura pacificaはポタモトリゴン科に属するエイの一種である。

分布

オアハカ州からコスタリカまでの中米の太平洋岸に分布する。ガラパゴス諸島でも見られる。浅い砂泥底に生息する。近縁種のStyracura schmardaeのような低塩分への耐性を持つかは不明である^[2]^[3]^[4]。

形態

最大で全長150センチメートル、体盤幅60センチメートルになる。体盤は丸く、吻端は鈍角で小さな突起がある。尾に鰭膜はないが、腹面に隆起線がある。背面と尾は粗い皮歯で覆われる^[3]。肩部には大きな突起があり、2対の隆起線が前後に伸びる^[2]。尾には毒棘がある^[5]。

生態

寄生虫として、線虫のEchinocephalus janzeni、条虫のAcanthobothroides pacificus、Rhinebothrium geminumが知られる^[6]^[7]。他のトビエイ類同様に無胎盤性の胎生である^[5]。

分類

参考文献

^ Kyne, P.M., Charvet, P., Areano, E.M., Avalos, C., Cevallos, A., Espinoza, M., González, A., Herman, K., Mejía-Falla, P.A., Morales-Saldaña, J.M. & Navia, A.F. (2020). “Styracura pacifica”. IUCN Red List of Threatened Species 2020: e.T144163683A144164959. doi:10.2305/IUCN.UK.2020-3.RLTS.T144163683A144164959.en 2023年6月28日閲覧。.
^ ^a ^b Lovejoy, N.R. (1996). “Systematics of myliobatoid elasmobranchs: with emphasis on the phylogeny and historical biogeography of neotropical freshwater stingrays (Potamotrygonidae: Rajiformes)”. Zoological Journal of the Linnean Society 117 (3): 207–257. doi:10.1111/j.1096-3642.1996.tb02189.x.
^ ^a ^b Allen, G.R.; Robertson, D.R. (1994). Fishes of the Tropical Eastern Pacific. University of Hawaii Press. ISBN 0-8248-1675-7
^ Carvalho, M.R.d.; Loboda, T.S.; Silva, J.P.C.B.d. (2016). “A new subfamily, Styracurinae, and new genus, Styracura, for Himantura schmardae (Werner, 1904) and Himantura pacifica (Beebe & Tee-Van, 1941) (Chondrichthyes: Myliobatiformes)”. Zootaxa 4075 (3): 201–221. doi:10.11646/zootaxa.4175.3.1. PMID 27811760.
^ ^a ^b Froese, Rainer and Pauly, Daniel, eds. (2009). "Himantura pacifica" in FishBase. March 2009 version.
^ Hoberg, E.P.; Brooks, D.R.; Ureña, H.M. & Erbe, E. (June 1998). “Echinocephalus janzeni n. sp. (Nematoda: Gnathostomatidae) in Himantura pacifica (Chondrichthyes: Myliobatiformes) from the Pacific Coast of Costa Rica and Mexico, with Historical Biogeographic Analysis of the Genus”. The Journal of Parasitology 84 (3): 571–581. doi:10.2307/3284726. JSTOR 3284726. PMID 9645860.
^ Marques, F.; Brooks, D.R. & Ureña, H.M. (April 1996). “Two New Species of Tetraphyllidean Cestodes in Himantura pacifica (Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica”. The Journal of Parasitology 82 (2): 302–306. doi:10.2307/3284165. JSTOR 3284165. PMID 8604101.

[1] Kyne, P.M., Charvet, P., Areano, E.M., Avalos, C., Cevallos, A., Espinoza, M., González, A., Herman, K., Mejía-Falla, P.A., Morales-Saldaña, J.M. & Navia, A.F. (2020). “Styracura pacifica”. IUCN Red List of Threatened Species 2020: e.T144163683A144164959. doi:10.2305/IUCN.UK.2020-3.RLTS.T144163683A144164959.en 2023年6月28日閲覧。.

[lovejoy-2] Lovejoy, N.R. (1996). “Systematics of myliobatoid elasmobranchs: with emphasis on the phylogeny and historical biogeography of neotropical freshwater stingrays (Potamotrygonidae: Rajiformes)”. Zoological Journal of the Linnean Society 117 (3): 207–257. doi:10.1111/j.1096-3642.1996.tb02189.x.

[allen_and_robertson-3] Allen, G.R.; Robertson, D.R. (1994). Fishes of the Tropical Eastern Pacific. University of Hawaii Press. ISBN 0-8248-1675-7

[Cavalho2016-4] Carvalho, M.R.d.; Loboda, T.S.; Silva, J.P.C.B.d. (2016). “A new subfamily, Styracurinae, and new genus, Styracura, for Himantura schmardae (Werner, 1904) and Himantura pacifica (Beebe & Tee-Van, 1941) (Chondrichthyes: Myliobatiformes)”. Zootaxa 4075 (3): 201–221. doi:10.11646/zootaxa.4175.3.1. PMID 27811760.

[fishbase-5] Froese, Rainer and Pauly, Daniel, eds. (2009). "Himantura pacifica" in FishBase. March 2009 version.

[6] Hoberg, E.P.; Brooks, D.R.; Ureña, H.M. & Erbe, E. (June 1998). “Echinocephalus janzeni n. sp. (Nematoda: Gnathostomatidae) in Himantura pacifica (Chondrichthyes: Myliobatiformes) from the Pacific Coast of Costa Rica and Mexico, with Historical Biogeographic Analysis of the Genus”. The Journal of Parasitology 84 (3): 571–581. doi:10.2307/3284726. JSTOR 3284726. PMID 9645860.

[7] Marques, F.; Brooks, D.R. & Ureña, H.M. (April 1996). “Two New Species of Tetraphyllidean Cestodes in Himantura pacifica (Chondrichthyes: Myliobatiformes: Dasyatididae) from the Northwest Coast of Costa Rica”. The Journal of Parasitology 82 (2): 302–306. doi:10.2307/3284165. JSTOR 3284165. PMID 8604101.

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