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A new throscid from mid-Cretaceous Burmese amber (Coleoptera: Elateroidea: Throscidae)
Historical Biology ( IF 1.4 ) Pub Date : 2020-03-20 , DOI: 10.1080/08912963.2020.1741573
Yan-Da Li 1, 2 , Yan-Chen Zhao 3 , Di-Ying Huang 4 , Chen-Yang Cai 4, 5
Affiliation  

ABSTRACT

Throscidae is a small family belonging to the polyphagan superfamily Elateroidea. Fossil throscids with a large morphological variety have been discovered from Cretaceous and Cenozoic amber deposits. However, only one of them has been reported from the fossil-rich Cretaceous Burmese amber so far. Here we describe and figure the second throscid beetle in mid-Cretaceous Burmese amber (ca. 99 Ma), Trixagosoma guangyuani gen. et sp. nov. The new fossil species has Trixagus-like short mesotarsal grooves and Potergosoma-like prosternum with nonparallel carinae. Our phylogenetic analysis indicates that it represents an early branching lineage of Throscidae. Its short mesotarsal grooves on metaventrite might represent an early evolutionary stage of this structure.

http://zoobank.org/urn:lsid:zoobank.org:pub:2793C1A1-EE55-4F96-B3E8-E98D289EB261



中文翻译:

一种来自中白垩世缅甸琥珀的新 throscid(鞘翅目:Elateroidea:Throscidae)

摘要

Throscidae 是属于多食性总科 Elateroidea 的一个小科。在白垩纪和新生代琥珀矿床中发现了形态多样的化石throscids。然而,迄今为止,从富含化石的白垩纪缅甸琥珀中只报道了其中一种。在这里,我们描述并描绘了中白垩世缅甸琥珀(约 99 Ma)中的第二个 throscid 甲虫,Trixagosoma guangyuani gen。等 sp. 十一月 新的化石物种具有类似 Trixagus的短跗骨沟和类似 Potergosoma的具有不平行隆突的胸骨。我们的系统发育分析表明它代表了Throscidae 的早期分支谱系。它在metaventrite 上的短跖骨沟可能代表了这种结构的早期进化阶段。

http://zoobank.org/urn:lsid:zoobank.org:pub:2793C1A1-EE55-4F96-B3E8-E98D289EB261

更新日期:2020-03-20
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