DNA barcode reveals high cryptic diversity in the commercially important Penaeini shrimps (Decapoda, Penaeidae)

Farias, Maria Carolina Lima; Filho, Paulo Costa de Oliveira; Pontes, Alany Itala; Jacobina, Uedson Pereira

doi:10.1007/s13127-023-00616-9

Cited by 2 publications

(1 citation statement)

References 73 publications

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“…DNA barcoding provides new insights for exploring species diversity and delimitation, and extensive sampling for meta-barcodes has revealed high cryptic diversity [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. In 2004, Hebert et al discovered ten cryptic species in a neotropical skipper butterfly named Astraptes fulgerator (Walch) using DNA barcoding and morphological traits, including caterpilal color patterns and subtle differences in adult patterns and size [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

DNA Barcoding Supports “Color-Pattern’’-Based Species of Stictochironomus from China (Diptera: Chironomidae)

Song,

Chen,

Wang

et al. 2024

Insects

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The genus Stictochironomus (Diptera: Chironomidae) has an almost worldwide distribution, with more than 30 species. However, species delimitation and identification based on the markings on the wings and legs are controversial and uncertain. In this study, we focused on color patterns to review the adults of the genus from China, and two new species (S. trifuscipes sp. nov. and S. quadrimaculatus sp. nov.) are described and figured. DNA barcodes can accurately separate the two new species with specific color patterns. However, heterospecific individuals form a monophyletic cluster in the phylogeny tree. For example, S. maculipennis (Meigen) and S. pictulus (Meigen), which have a lower interspecific genetic divergence, form a single clade. Sequences with the same species name but with high intraspecific distance form more than one phylogenetic clade, such as S. sticticus (Fabricius) of three clades, S. pictulus of four clades, S. akizukii (Tokunaga) and S. juncaii Qi, Shi, and Wang of two clades, might have potential cryptic species diversity. Species delimitation analysis using ASAP, PTP, and GMYC clearly delineated them as separate species. Consequently, color patterns are a good diagnostic characteristic for species delimitation in Stictochironomus. The distance-based analysis shows that a threshold of 4.5–7.7% is appropriate for species delimitation in Stictochironomus. Additionally, an updated key including color pattern variation for male adults of known Stictochironomus species from China is provided.

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