A new species of crayfish (Decapoda: Astacidea: Cambaridae) from the Cumberland Thrust Block (eastern Kentucky and Tennessee, USA), with notes on the evolution of Cambarus Erichson, 1846 in the Ohio River Basin of the Appalachian Mountains

IF 1.2 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Journal of Crustacean Biology Pub Date : 2023-06-01 DOI:10.1093/jcbiol/ruad023

R. Thoma, J. Fetzner

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引用次数: 0

Abstract

Cambarus intermontanus n. sp. is described from mountain streams in the Clear Creek basin along the Kentucky/Tennessee border between Cumberland and Pine Mountains on the Cumberland Thrust Block. The new species is morphologically most similar to Cambarus jezerinaci Thoma, 2000. It differs nevertheless from C. jezerinaci most consistently in the tuberculation of the opposable margins of the propodus. The new species possesses five or six tubercles and C. jezerinaci has four. Cambarus intermontanusn. sp. and C. jezerinaci differ from C. parvoculus Hobbs & Shoup, 1947 and C. distans Rhoades, 1944 in the thickness of the rostral margins and a more truncate rostral tip. The gonopod of C. jezerinaci has a central projection that is normally shorter than the mesial process, whereas that of C. intermontanusn. sp. is longer than the mesial process, C. distans is much shorter, and C. parvoculus is generally equal in length. The new species is genetically distinct from C. jezerinaci, C. magerae Thoma & Fetzner 2015, C. distans, and C. parvoculus differing by a 4–5% sequence divergence on average. Cambarus intermontanusn. sp. was found to be sister to a clade containing C. parvoculus, C. jezerinaci, and C. magerae.

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坎伯兰冲断块（美国肯塔基州东部和田纳西州）的一种新小龙虾（十足目：虾目：小龙虾科），并记录了1846年阿巴拉契亚山脉俄亥俄河流域小龙虾的进化

Cambarus intermontanus n.sp.是从坎伯兰冲断块上坎伯兰和松山之间肯塔基州/田纳西州边界的Clear Creek盆地的山溪中描述的。该新物种在形态上与2000年的Cambarus jezerinaci Thoma最为相似。然而，它与C.jezerinaci的不同之处最为一致的是，在出埃及门的相对边缘结瘤。新物种有五到六个块茎，C.jezerinaci有四个。山间坎巴鲁。sp.和C.jezerinaci与C.parvoculus Hobbs&Shoup，1947和C.distans-Roades，1944的不同之处在于喙缘的厚度和更截形的喙尖。jezerinaci的生殖脚类有一个中心突起，通常比内侧突短，而C.intermantanusn的生殖脚。sp.比近中突长，远中突短得多，小眼锥虫的长度通常相等。该新物种与C.jezerinaci、C.magerae-Thoma&Fetzner 2015、C.distans和C.parvoculus在基因上不同，平均相差4-5%的序列差异。山间坎巴鲁。sp.被发现是一个分支的姐妹，该分支包含细小念珠菌、jezerinaci和magerae。

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来源期刊

Journal of Crustacean Biology 生物-海洋与淡水生物学

CiteScore

2.10

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Crustacean Biology is the official journal of The Crustacean Society, publishing peer-reviewed research on all aspects of crustacean biology and other marine arthropods. Papers are published in English only, but abstracts or summaries in French, German, Portuguese, or Spanish may be added when appropriate.