New species of Edessa Fabricius, 1803 (Hemiptera: Pentatomidae) from Costa Rica

Phytophagous stink bugs are globally distributed and many harbor vertically inherited bacterial symbionts that are extracellular, yet little is known about how the symbiont’s genomes have evolved under this transmission strategy. Genome reduction is common in insect intracellular symbionts but limited genome sampling of the extracellular symbionts of distantly related stink bugs has precluded inferring patterns of extracellular symbiont genome evolution. To address this knowledge gap, we completely sequenced the genomes of the uncultivable bacterial symbionts of four neotropical stink bugs of the Edessa genus. Phylogenetic and comparative analyses indicated that the symbionts form a clade within the Pantoea genus and their genomes are highly reduced (∼0.8 Mb). Furthermore, genome synteny analysis and a jackknife approach for phylogenetic reconstruction, which corrected for long branch attraction artifacts, indicated that the Edessa symbionts were the result of a single symbiotic event that was distinct from the symbiosis event giving rise to Candidatus “Pantoea carbekii,” the extracellular symbiont of the invasive pentatomid stink bug, Halyomorpha halys. Metabolic functions inferred from the Edessa symbiont genomes suggests a shift in genomic composition characteristic of its lifestyle in that they retained many host-supportive functions while undergoing dramatic gene loss and establishing a stable relationship with their host insects. Given the undersampled nature of extracellular insect symbionts, this study is the first comparative analysis of these symbiont genomes from four distinct Edessa stink bug species. Finally, we propose the candidate name “Candidatus Pantoea edessiphila” for the species of these symbionts with strain designations according to their host species.

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“…nov 1” in Bistolas et al. 2014 and formally described in Fernandes Marin et al. 2015 ), E. loxdalii , and Edessa n. sp.…”

Section: Methodsmentioning

confidence: 93%

Cladogenesis and Genomic Streamlining in Extracellular Endosymbionts of Tropical Stink Bugs

Otero-Bravo

Goffredi

Sabree

2018

Genome Biology and Evolution

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Strong functional integration among multiple parts of the complex male and female genitalia of stink bugs

Genevcius¹,

Schwertner²

2017

Biological Journal of the Linnean Society

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Genitalia are among the most studied phenotypes because they exhibit high anatomical diversity, experience fast evolutionary rates and may be shaped by several evolutionary mechanisms. A key element to uncover the mechanisms behind such impressive diversity is their copulatory function. This topic has been overlooked, especially concerning structures not directly involved in sperm transfer and reception. Here, we conduct a hypothesis-driven experimental study to elucidate the operation of various external genital parts in five species of stink bugs with differing levels of phylogenetic relatedness. These insects are unique because their male and female genitalia are externally well developed, rigid and composed of multiple components. In contrast with their anatomical complexity and diversity, we show that genital structures work jointly to perform a single function of mechanical stabilization during copula. However, distinct lineages have evolved alternative strategies to clasp different parts of the opposite sex. In spite of a high functional correspondence between male and female traits, the overall pattern of our data does not clearly support an intersexual coevolutionary scenario. We propose that the extraordinary male genital diversity in the family is probably a result of a process of natural selection enhancing morphological accommodation, but we consider alternative mechanisms.

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Odara, a new genus to Edessinae (Hemiptera, Pentatomidae) with Eleven New Species

Campos

Fernandes

2022

Insect Syst. Evol.

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The genus Odara gen. n. is here described and composed exclusively of new species: Odara ori sp. n., Odara amazonica sp. n., Odara caribensis sp. n., Odara dracula sp. n., Odara maculatus sp. n., Odara osaensis sp. n., Odara peruensis sp. n., Odara rondoniensis sp. n., Odara tambopatensis sp. n., Odara umbabarauma sp. n. and Odara variegata sp. n. The new genus is characterized by the dorsal coloration green, humeral angles tooth-like generally with black apices, corium dark brown to black with yellow veins, parameres spearhead-shaped, and the sclerotized swelling of the ductus receptaculi in the female internal genitalia. The species are distributed from Central America to the Atlantic coast of South America, from Costa Rica to Rio de Janeiro [Brazil]. Diagnosis, keys to the species, and distributional maps are provided. Photographs of dorsal and ventral view, pygophore, female genital plates, male and female internal genitalia are also provided.

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New species of Edessa Fabricius, 1803 (Hemiptera: Pentatomidae) from Costa Rica

Cited by 6 publications

References 1 publication

Cladogenesis and Genomic Streamlining in Extracellular Endosymbionts of Tropical Stink Bugs

Cladogenesis and Genomic Streamlining in Extracellular Endosymbionts of Tropical Stink Bugs

Strong functional integration among multiple parts of the complex male and female genitalia of stink bugs

Odara, a new genus to Edessinae (Hemiptera, Pentatomidae) with Eleven New Species

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