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A New Species of Eumanota Edwards (Diptera: Mycetophilidae: Manotine) from Colombia: Evidence for a Pseudogondwanan Pattern
American Museum Novitates ( IF 1.5 ) Pub Date : 2018-12-18 , DOI: 10.1206/3915.1
Dalton S. Amorim 1 , Sarah S. Oliveira 2 , Andrea C. Henao-sepúlveda 3
Affiliation  

ABSTRACT Eumanota wolffae, sp. nov., is described from the high Andean forests of Colombia. This is the first Neotropical species of the clade of non-Manota genera of the mycetophilid subfamily Manotinae—to date known entirely from the Oriental and the northwestern Australasian regions, and in Baltic amber. With the other species of Eumanota Edwards, this species shares, among other features, a largely developed third maxillary palpomere, projecting beyond the base of fourth palpomere, with a wide sensorial pit, a flat inner face, and the last palpomere at least 4× the length of the fourth palpomere. The systematic position of the Colombian species within the Manotinae is addressed. The biogeographic significance of Eumanota in the Neotropical region is discussed, interpreted here as a concurrent incidence of a circumtropical pattern and Gondwanan distributions, in other words, a particular pattern of biogeographic pseudocongruence, referred to here as a “pseudogondwanan pattern.” This pattern is associated with an early Cenozoic tropical biota over Laurasian terranes that expanded its distribution to the south (in the Americas, Africa, and Australasia), followed by large-scale extinction of Nearctic and Palearctic representatives due to global cooling in the Neogene. A discussion is provided about the correlation between these patterns and evidence of Late Cretaceous-Paleogene tropical floras over Laurasian terranes.

中文翻译:

来自哥伦比亚的 Eumanota Edwards 新种(双翅目:Mycetophilidae:Manotine):Pseudogondwanan 模式的证据

摘要 Eumanota wolffae,sp。11 月,来自哥伦比亚的高安第斯森林。这是嗜菌门亚科 Manotinae 的非 Manota 属进化枝的第一个新热带物种 - 迄今为止完全在澳大利亚东部和西北部地区以及波罗的海琥珀中已知。与 Eumanota Edwards 的其他物种一样,该物种除了其他特征外,还具有发达的第三上颌掌骨,突出于第四掌骨的基部,具有宽阔的感觉坑,平坦的内面,最后的掌骨至少 4 倍第四掌骨的长度。哥伦比亚物种在 Manotinae 中的系统位置得到解决。讨论了 Eumanota 在新热带地区的生物地理意义,这里解释为环热带模式和冈瓦纳分布的同时发生,换言之,一种特定的生物地理伪一致性模式,这里称为“伪冈瓦纳模式”。这种模式与劳亚大陆上的早期新生代热带生物群有关,该生物群将其分布扩展到南部(在美洲、非洲和澳大拉西亚),随后由于新近纪全球变冷导致近北和古北代表大规模灭绝。讨论了这些模式与劳亚大陆上晚白垩世-古近世热带植物群的证据之间的相关性。“这种模式与劳亚大陆地体上的早期新生代热带生物群有关,该生物群将其分布扩展到南部(美洲、非洲和澳大拉西亚),随后由于新近纪全球变冷导致近北和古北代表大规模灭绝. 讨论了这些模式与劳亚大陆上晚白垩世-古近世热带植物群的证据之间的相关性。这种模式与劳亚大陆地体上的早期新生代热带生物群有关,该生物群将其分布扩展到南部(美洲、非洲和澳大拉西亚),随后由于新近纪全球变冷导致近北和古北代表大规模灭绝. 讨论了这些模式与劳亚大陆上晚白垩世-古近世热带植物群的证据之间的相关性。
更新日期:2018-12-18
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