Billoperla starki gen. et sp. nov., a new extinct stonefly genus and species is described based on a well-preserved male adult in mid-Cretaceous Burmese amber and assigned to the subfamily Acroneuriinae of Perlidae. Its sternum 9 with a triangular hammer, and its epiproct is large, well-developed and upcurved, being distinctive for both the extant and extinct Perlidae. The new fossil genus is diagnostic mainly by the RA vein almost reaching wing apex, tergum 10 unmodified, paraprocts reduced, hammer present, and by the large and apically modified epiproct.

中文翻译：

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来自中白垩纪缅甸琥珀的新珍珠石蝇（昆虫纲：Plecoptera）

Billoperla starki gen。等 sp. 11 月，根据白垩纪中期缅甸琥珀中保存完好的雄性成虫描述了一种新的已灭绝的石蝇属和种，并将其归入珍珠蝇亚科 Acroneuriinae。它的胸骨 9 有一个三角形的锤子，它的外垂体大、发达且向上弯曲，对于现存和已灭绝的珍珠科来说都是独特的。新的化石属主要通过几乎到达翼尖的 RA 脉、未修饰的 tergum 10、副前体减少、存在锤状体以及大的和顶部修饰的外前体来诊断。