We present the bat assemblage from the early Miocene (MN4, 16.9–15.95 MY) basin of Ribesalbes-Alcora, which has yielded the remains of ten chiropteran taxa. Bat assemblages are rarely recovered in the fluvio-lacustrine fossil record. A bat species described in this work, Cuvierimops penalveri sp. nov., is a new form of a typically Oligocene free-tailed bat. In addition, the other molossids Hydromops helveticus, Rhizomops cf. brasiliensis, Chaerephon sp., Tadarida sp., and the vespertilionids Myotis cf. intermedius and Miostrellus aff. petersbuchensis, as well as undetermined fossils ascribed to the genera Submyotodon, Plecotus, and Rhinolophus are described. This is the first record of the genus Rhizomops in the early Miocene; the genus Cuvierimops is the first recording from the Neogene, while the ‘Lazarus taxon’ Chaerephon is the first fossil record of this genus, registered previously only in Holocene deposits. This bat assemblage with a high abundance of molossids is typical from the early Oligocene of western Europe, while in the early Miocene from Europe the molossids are scarce. The abundance of these bats is consistent with the presence of a tropical forest surrounding a paleolake. The fossils from the Ribesalbes-Alcora Basin represent the most complete bat assemblage of the Iberian Peninsula during this age, and significantly increase our knowledge about the early Miocene bats of Europe.

中文翻译：

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来自 Ribesalbes-Alcora 盆地（西班牙卡斯特罗）早期中新世的一个残留的热带森林蝙蝠群

我们展示了来自 Ribesalbes-Alcora 早中新世 (MN4, 16.9–15.95 MY) 盆地的蝙蝠组合，该盆地产生了十个翼翅目分类群的遗骸。在河湖化石记录中很少发现蝙蝠组合。这项工作中描述的蝙蝠物种，对虾sp。nov.，是一种典型的渐新世无尾蝙蝠的新形式。此外，其他 molossids瑞士水拖,根茎菌.巴西人,柴瑞丰sp.,忠田sp. 和 vespertilionids鼠尾草.中间体和鲇鱼亲。圣彼得堡，以及归属于该属的未确定化石亚肌齿象,蜉蝣， 和犀牛被描述。这是该属的第一个记录根茎菌属早中新世；属鲅鱼是新近纪的第一个记录，而“拉撒路分类单元”柴瑞丰是该属的第一个化石记录，以前仅在全新世沉积物中登记。这种具有大量软体动物的蝙蝠组合是西欧渐新世早期的典型特征，而在欧洲的中新世早期，软体动物很少见。这些蝙蝠的数量与古湖周围的热带森林的存在是一致的。来自 Ribesalbes-Alcora 盆地的化石代表了这个时代伊比利亚半岛最完整的蝙蝠组合，并显着增加了我们对欧洲早期中新世蝙蝠的了解。