Glon Mael G, Thoma Roger F, Daly Marymegan, Freudenstein John V
The Ohio State University Museum of Biological Diversity, 1315 Kinnear Road, Columbus, Ohio 43212, USA.
Zootaxa. 2019 Jan 14;4544(4):451-478. doi: 10.11646/zootaxa.4544.4.1.
Lacunicambarus diogenes (Girard 1852) was, until recently, considered to be one of the most widely distributed North American crayfish species, occurring in 31 U.S. States and one Canadian province east of the North American Rocky Mountains. Glon et al. (2018) investigated this claim and found that L. diogenes sensu lato was actually a species complex. The authors redescribed L. diogenes and restricted its range to the Atlantic Coastal Plain and Piedmont ecoregions of eastern North America. In doing so, they also revealed the existence of several probable undescribed species of Lacunicambarus that were previously considered to be L. diogenes. Here, we use morphological and molecular techniques to distinguish and describe one of these species: Lacunicambarus chimera sp. nov., a large primary burrowing crayfish found in parts of the Lower Mississippi, Ohio, Tennessee and Upper Mississippi River Basins. Lacunicambarus chimera is morphologically similar to L. diogenes, from which it can be distinguished by the greater number of spines on the ventrolateral margin of its merus, its wider antennal scale terminating in a short spine, and the presence of a single longitudinal stripe on the dorsal side of its abdomen. We also provide an updated key to Lacunicambarus.
直到最近，狄俄尼索斯穴虾（Lacunicambarus diogenes，吉拉德，1852年）仍被认为是北美分布最广泛的螯虾物种之一，分布于美国31个州以及北美落基山脉以东的一个加拿大省份。格隆等人（2018年）对这一说法进行了调查，发现广义的狄俄尼索斯穴虾实际上是一个物种复合体。作者重新描述了狄俄尼索斯穴虾，并将其分布范围限定在北美东部的大西洋沿岸平原和皮埃蒙特生态区。在此过程中，他们还发现了几种可能未被描述的穴虾属物种，这些物种以前被认为是狄俄尼索斯穴虾。在这里，我们使用形态学和分子技术来区分和描述其中一个物种：奇美拉穴虾（Lacunicambarus chimera sp. nov.），一种在密西西比河下游、俄亥俄河、田纳西河和密西西比河上游流域部分地区发现的大型原生掘穴螯虾。奇美拉穴虾在形态上与狄俄尼索斯穴虾相似，但其可通过以下特征与后者区分：其长节腹侧边缘的刺更多、触角鳞片更宽且末端有短刺，以及腹部背面有一条纵向条纹。我们还提供了穴虾属的最新检索表。
