Trihelota, a new and unusual helotid beetle genus from mid-Cretaceous Burmese amber (Coleoptera: Helotidae)

IF 0.9 4区农林科学 Q3 ENTOMOLOGY

Acta Entomologica Musei Nationalis Pragae Pub Date : 2020-09-23 DOI:10.37520/AEMNP.2020.033

Erok Tihelka, Diying Huang, Chen-yang Cai

引用次数: 3

Abstract

A new genus belonging to the cucujoid family Helotidae, Trihelota gen. nov., is described from mid-Cretaceous (ca.99 million years old) amber from Kachin State, northern Myanmar, containing a single species T. fulvata sp. nov. The minute fossil was documented using fluorescence microscopy and X-ray microtomography to reveal fine morphological details. Trihelota is characterised by its transverse head, antennal club about 1.5 times longer than wide, pronotum almost parallel-sided, and elytra not costate. Notably, each elytron possesses three coloured spots, a character unique within Helotidae. The new genus considerably expands the known morphological disparity of Cretaceous helotids. A keyto extinct and extant genera of the family Helotidae is provided along with a checklist of fossil species.

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Trihelota，白垩纪中期缅甸琥珀中一个新的不寻常的helotid甲虫属（鞘翅目：Helotidae）

在缅甸北部克钦邦白垩纪中期（约99万年前）的琥珀中，描述了属于葫芦科Helotidae的一个新属Trihelota gen.nov.，其中包含一个物种T.fulvata sp.nov.。使用荧光显微镜和X射线显微摄影记录了这一微小的化石，以揭示精细的形态细节。Trihelota的特征是它的横向头部，触角棒比宽的长约1.5倍，前足几乎平行，鞘翅不肋。值得注意的是，每个elytron都有三个彩色斑点，这在Helotidae中是独一无二的。这个新属极大地扩大了白垩纪helotids的已知形态差异。提供了Helotidae科已灭绝和现存属的钥匙以及化石物种清单。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Entomologica Musei Nationalis Pragae ENTOMOLOGY-

CiteScore

1.60

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： An open access journal publishing papers on insect systematics, morphology of adult and immature stages and/or their biology, phylogeny, large-scale catalogues, and general papers on methodology of insect systematics AEMNP is publishing papers on: Insect systematics, taxonomy and nomenclature; Morphology of adult and immature stages and/or their biology with possible applications in taxonomy and phylogeny; Phylogeny at least partly based on morphological characters (or with morphological characters mapped on the tree); Catalogues applicable for further taxonomy and biodiversity studies; General papers on methodology of insect taxonomy.