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Keywords = Coccoidea superfamily

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10 pages, 1002 KB  
Article
Enhanced Sequence Evolution Rates Correlate with Significant Rearrangements in Coccoid Mitochondrial Genomes
by Lijuan Zhang, Junpeng Ji, Yuqiang Xi and Nan Song
Diversity 2025, 17(8), 515; https://doi.org/10.3390/d17080515 - 25 Jul 2025
Viewed by 694
Abstract
Scale insects, which belong to the superfamily Coccoidea within the order Hemiptera, encompass more than 8000 species worldwide. The adult females of these species are characterized by their immobility, and often lack wings and legs. Scale insects feed on plant tissues and can [...] Read more.
Scale insects, which belong to the superfamily Coccoidea within the order Hemiptera, encompass more than 8000 species worldwide. The adult females of these species are characterized by their immobility, and often lack wings and legs. Scale insects feed on plant tissues and can cause significant agricultural damage as pests. This study presents the sequencing of five coccoid mitogenomes, revealing detailed annotations and comparisons with other Hemiptera. The sequencing yielded between 73 million and over 121 million reads, allowing for the reconstruction of mitogenomes ranging from 12,821 to 14,446 nucleotides. Notably, a high A + T content was observed across the newly sequenced mitogenomes. Gene rearrangements were identified in all five newly sequenced mitogenomes, with the evolutionary rate analysis indicating that Coccoidea exhibit the highest Ka and Ka/Ks values among the hemipterans. In a phylogenetic context, the mitogenomes of representative species from Coccoidea and Aleyrodoidea exhibit more frequent mitochondrial gene rearrangements than those of other hemipteran groups. The analysis suggests that the frequent mitochondrial gene rearrangements observed in the coccoid species are associated with accelerated nucleotide substitution rates, supporting a connection between genetic evolution and structural variation in mitogenomes. Full article
(This article belongs to the Section Phylogeny and Evolution)
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14 pages, 4076 KB  
Article
The Complete Mitochondrial Genome of the Chinese White Wax Scale Insect, Ericerus pela Chavannes (Hemiptera: Coccidae), with Novel Gene Arrangement and Truncated tRNA Genes
by Jia-Qi An, Shu-Hui Yu, Shu-Jun Wei, Hong-Ping Zhang, Yuan-Chong Shi, Qiu-Yu Zhao, Zuo-Yi Fu and Pu Yang
Insects 2023, 14(3), 290; https://doi.org/10.3390/insects14030290 - 16 Mar 2023
Cited by 4 | Viewed by 3293
Abstract
The Chinese white wax scale insect, Ericerus pela Chavannes (Hemiptera: Coccidae), is one of the scale insects with great economic value and has been dispersed and reared in China for over one thousand years. Its mitochondrial genome provides essential information for the molecular [...] Read more.
The Chinese white wax scale insect, Ericerus pela Chavannes (Hemiptera: Coccidae), is one of the scale insects with great economic value and has been dispersed and reared in China for over one thousand years. Its mitochondrial genome provides essential information for the molecular identification and genetic study of this species. We assembled the complete mitochondrial genome of E. pela based on PacBio sequencing and analyzed its genomic features. The genome was 17,766 bp in length with 13 protein-coding genes, 22 tRNAs, and two rRNA genes. The analysis results showed E. pela had significant gene rearrangements involving tRNAs compared with other Coccoidea species. Furthermore, E. pela’s nine tRNAs were identified to have obvious truncated structures. The phylogenetic tree compiled of the species showed a long branch of the Coccoidea lineage, which indicated the high evolutionary rate in this group. Our study revealed the mitochondrial characteristics of E. pela and enriched the mitochondrial genetic information on Coccoidea species. It also determined the occurrence of gene rearrangement for the species in this superfamily. Full article
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