Anker Arthur, Hultgren Kristin M, Grave Sammy DE
Museu Paraense Emílio Goeldi, Campus de Pesquisa, Avenida Perimetral 1901, CEP 66077-830, Terra Firme, Belém, PA, Brazil Current address: Universidade Federal de Goiás, Instituto de Ciências Biológicas, Avenida Esperança s/n, Campus Samambaia - Prédio ICB5, CEP 74690-900, Goiânia, GO, Brazil.
Zootaxa. 2017 Apr 12;4254(1):111-119. doi: 10.11646/zootaxa.4254.1.7.
A new, conspicuously coloured species of the alpheid genus Synalpheus Spence Bate, 1888, is described based on material collected on the Pacific coast of Panama. Synalpheus pinkfloydi sp. nov. is closely related to the western Atlantic S. antillensis Coutière, 1909, the two taxa being transisthmian, cryptic sister species. Both species are characterised by the distal areas of their major and minor chelae coloured in an intense, almost glowing pink-red. The morphological differences between S. pinkfloydi sp. nov. and S. antillensis Coutière, 1909 are subtle, being limited to the slightly different proportions of the merus of both chelipeds, distodorsal armature of the major cheliped merus, relative length of the antennal scaphocerite, and body size. However, they are genetically different with a 10.2% sequence divergence in COI. Based on molecular clock estimates, these transisthmian taxa diverged around 6.8-7.8 mya, i.e. well before the final closure of the Isthmus of Panama 2.5-3 mya.
基于在巴拿马太平洋海岸收集的材料，描述了藻虾属（Synalpheus Spence Bate，1888）的一个新的、颜色鲜艳的物种。粉红 Floyd 藻虾（Synalpheus pinkfloydi sp. nov.）与西大西洋的 1909 年描述的安的列斯藻虾（S. antillensis Coutière）密切相关，这两个分类单元是跨巴拿马地峡的隐存姊妹物种。这两个物种的主要和次要螯的远端区域均为强烈的、几乎发光的粉红 - 红色。粉红 Floyd 藻虾（Synalpheus pinkfloydi sp. nov.）与 1909 年描述的安的列斯藻虾（S. antillensis Coutière）之间的形态差异很细微，仅限于两个螯足的长节比例略有不同、主要螯足长节的背侧远端刚毛、触角鳞片的相对长度以及体型大小。然而，它们在基因上存在差异，细胞色素氧化酶亚基 I（COI）的序列分歧为 10.2%。根据分子钟估计，这些跨巴拿马地峡的分类单元在约 680 - 780 万年前分化，即在 250 - 300 万年前巴拿马地峡最终闭合之前很久。
