来自西班牙阿拉贡韦斯卡始新世的新后翼蟹（甲壳纲，短尾派，后翼蟹科，吉尔，1894年）

New retroplumid crabs (Crustacea, Brachyura, Retroplumidae Gill, 1894) from the Eocene of Huesca (Aragón, Spain).

作者信息

Artal Pedro, Van Bakel Barry W M, Fraaije René H B, Jagt John W M

机构信息

Museo Geológico del Seminario de Barcelona, Diputación 231, E-08007 Barcelona, Spain.

出版信息

Zootaxa. 2013;3652:343-52. doi: 10.11646/zootaxa.3652.3.3.

DOI:10.11646/zootaxa.3652.3.3

PMID:26269837

Abstract

Two new brachyurans assignable to the family Retroplumidae Gill, 1894, Serrablopluma diminuta n. gen., n. sp., and Gaudipluma bacamortensis n. gen., n. sp., from the Eocene of northern Spain (Huesca, Aragón), substantially enlarge our current knowledge of the morphological diversity of the family. The material, with well-preserved ventral surfaces, permits the erection of two new genera that can be referred to the family with confidence on the basis of the general carapace shape, narrow front, a reduced last pair of pereiopods and characteristic thoracic sternum (broad, trapezoidal sternites 3, 4, subrectangular sternites 5-7, sternite 8 conspicuously reduced and inclined). Serrablopluma diminuta n. gen., n. sp. co-occurs with two other retroplumids in the most diverse fossil assemblage of that family known to date.

摘要

两种可归入Retroplumidae Gill科（1894年）的新短尾类动物，即西班牙北部（阿拉贡自治区韦斯卡省）始新世的小型锯齿羽蟹（Serrablopluma diminuta）新属新种，以及巴卡莫尔特高迪羽蟹（Gaudipluma bacamortensis）新属新种，极大地扩展了我们目前对该科形态多样性的认识。这些标本腹面保存完好，基于其整体的头胸甲形状、狭窄的额部、退化的最后一对步足以及独特的胸腹板（宽阔的梯形第3、4胸腹板，近矩形的第5 - 7胸腹板，显著缩小且倾斜的第8胸腹板），能够可靠地建立两个新属。小型锯齿羽蟹新属新种与该科已知的最多样化化石组合中的另外两种Retroplumidae科动物共生。