A New Species of Pseudostrandesia Savatenalinton and Martens, 2009 (Ostracoda, Crustacea) Collected from Two Pet Shops in Central Japan: an Alien Species?
A New Species of Pseudostrandesia Savatenalinton and Martens, 2009 (Ostracoda, Crustacea) Collected from Two Pet Shops in Central Japan: an Alien Species?
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DOI：
10.2108/zs210027
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发表时间：
2021-07
影响因子：
0.9
通讯作者：
R. J. Smith;Hirokazu Ozawa;Keigo Kawashima;Shizuko Nakai
中科院分区：
文献类型：
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作者：
R. J. Smith;Hirokazu Ozawa;Keigo Kawashima;Shizuko Nakai
2009年，在日本中部关东地区的两家宠物店收集到一种未描述的淡水介形虫，属于Pseudostrandesia Savatenalinton和Martens属。该种在此命名为Pseudostrandesia tenebrarum sp. nov.，与先前报道的东南亚四种相似，但可以通过甲壳和附属物特征来区分。这是已知的雄性的第二个物种。在该属的9个先前描述的物种中，一个只在土耳其被发现，其他的在东南亚和附近地区被发现，其中一个在印度和中国东部也有记录。有两种情况可以解释日本宠物店中存在的Pseudostrandesia tenebrarum sp. nov.：它要么原产于日本，但尚未在其自然栖息地中发现，要么是一种外来物种，可能是无意中与植物或鱼类一起进口用于宠物贸易。我们回顾了这两种情况的可能性，并得出结论，虽然没有足够的证据可以肯定，它可能是一个外来物种在日本。最有可能的起源是东南亚，因为它的形态与特定的东南亚物种非常相似。幼鱼和成年鱼都被发现，这表明该物种正在宠物贸易中繁殖，支持了它对自然范围以外的地区具有入侵潜力的观点。该物种的描述和报告强调了可能将外来物种引入日本，并有助于进一步监测。
An undescribed species of freshwater ostracod belonging to the genus Pseudostrandesia Savatenalinton and Martens, 2009 was collected from two pet shops in the Kanto region of central Japan. This species, herein named Pseudostrandesia tenebrarum sp. nov., is similar to four species previously reported from Southeast Asia, but can be distinguished by carapace and appendage features. It is the second species of the genus for which males are known. Of the nine previously described species in the genus, one is exclusively known from Turkey, and the others are found in Southeast Asia and the vicinity, one of which is also recorded in India and east China. There are two scenarios to explain the existence of Pseudostrandesia tenebrarum sp. nov. in pet shops in Japan: it is either native to Japan but has yet to be discovered in its natural habitat, or it is an alien species, perhaps unwittingly imported with plants or fish for the pet trade. We review the likelihood of both scenarios, and conclude that although there is insufficient evidence to be sure, it is potentially an alien species in Japan. The most likely origin is Southeast Asia, as evidenced by its close morphological resemblance to particular Southeast Asian species. Juveniles as well as adults were recovered, indicating that this species is reproducing in the pet trade, supporting the notion that it has invasive potential to areas outside of its natural range. The description and report of this species highlights a possible introduction of an alien species to Japan, and facilitates further monitoring.