Panamanian velvet worms in the genus <i>Epiperipatus</i>, with notes on their taxonomy and distribution and the description of a new species (Onychophora, Peripatidae)

Costa, Cristiano Sampaio; Giribet, Gonzalo

doi:10.1111/ivb.12336

Cited by 5 publications

(3 citation statements)

References 37 publications

(77 reference statements)

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“…Cryptic diversity within extant Onychophora is not unique to New Zealand, and molecular studies of the onychophorans endemic to Australia, south and central America, and South Africa continue to reveal hidden biodiversity (e.g., [57][58][59][60]). Some Australian taxa display secondary reproductive traits that aid recognition [61][62][63], but in many cases, low character variation is the norm.…”

Section: Discussionmentioning

confidence: 99%

Ngāokeoke Aotearoa: The Peripatoides Onychophora of New Zealand

Trewick,

Koot,

Morgan-Richards

2024

Insects

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(1) Background: Originally described as a single taxon, Peripatoides novaezealandiae (Hutton, 1876) are distributed across both main islands of New Zealand; the existence of multiple distinct lineages of live-bearing Onychophora across this spatial range has gradually emerged. Morphological conservatism obscured the true endemic diversity, and the inclusion of molecular tools has been instrumental in revealing these cryptic taxa. (2) Methods: Here, we review the diversity of the ovoviviparous Onychophora of New Zealand through a re-analysis of allozyme genotype data, mitochondrial DNA cytochrome oxidase subunit I sequences, geographic information and morphology. (3) Results: New analysis of the multilocus biallelic nuclear data using methods that do not require a priori assumptions of population assignment support at least six lineages of ovoviviparous Peripatoides in northern New Zealand, and mtDNA sequence variation is consistent with these divisions. Expansion of mitochondrial DNA sequence data, including representation of all existing taxa and additional populations extends our knowledge of the scale of sympatry among taxa and shows that three other lineages from southern South Island can be added to the Peripatoides list, and names are proposed here. In total, 10 species of Peripatoides can be recognised with current data.

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Section: Discussionmentioning

confidence: 99%

Ngāokeoke Aotearoa: The Peripatoides Onychophora of New Zealand

Trewick,

Koot,

Morgan-Richards

2024

Insects

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“…Accounts of alpha taxonomic diversity among velvet worm species have been notoriously unreliable because species were historically delineated based on unreliable and variable morphological taxonomic features such as leg pair numbers and dorsal color patterns (Ruhberg, 1985). Renewed recent interest in Onychophora, coupled with the application of modern systematic methods, such as DNA sequence technology and scanning electron microscopy (SEM), has revealed a wealth of novel species (Barnes et al, 2020; Costa & Giribet, 2021; Daniels et al, 2009, 2013, 2016, 2017; McDonald & Daniels, 2012; Oliveira et al, 2010, 2011, 2012; Sato et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Renewed recent interest in Onychophora, coupled with the application of modern systematic methods, such as DNA sequence technology and scanning electron microscopy (SEM), has revealed a wealth of novel species (Barnes et al, 2020;Costa & Giribet, 2021;Daniels et al, 2009Daniels et al, , 2013Daniels et al, , 2016Daniels et al, , 2017Oliveira et al, 2010Oliveira et al, , 2011Oliveira et al, , 2012Sato et al, 2018).…”

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confidence: 99%

Refining species boundaries among velvet worms (Onychophora, Peripatopsidae), with the description of two new species of Opisthopatus from South Africa

Barnes

Daniels

2022

Invertebrate Biology

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In the present study, two new species of velvet worm, Opisthopatus, from the Eastern Cape province of South Africa are described. We used both mitochondrial and nuclear DNA sequence data (cytochrome oxidase subunit I [COI] and 18S rRNA subunit [18S]) to explore the possibility that species boundaries in Opisthopatus have been underestimated. A previous fine‐scale phylogeographic study of the velvet worm Opisthopatus amaxhosa demonstrated the presence of two distinct clades, of which the first could be assigned to O. amaxhosa and the second represented a novel as yet undescribed species. In addition, specimens of Opisthopatus from the Valley of Desolation, Camdeboo Nature Reserve, Graaff‐Reinet, were not assigned to a new species in the most recent taxonomic revision because of the limited number of specimens. Following recent collection and scanning electron microscopy, we assigned the Graaff‐Reinet specimens to Opisthopatus camdebooi sp. nov. and the second lineage in sympatry with O. amaxhosa we described as Opisthopatus baziya sp. nov. The application of four species delimitation methods (Assemble Species by Automatic Partitioning [ASAP], Poisson Tree Processes [PTP], generalized mixed Yule‐coalescent model [GMYC], and Species Tree and Classification Estimation, Yarely [STACEY]) generally revealed congruent groupings across clades, suggesting that the alpha taxonomic diversity in Opisthopatus has been underestimated. The continued discovery of new velvet worm species in poorly or unsampled areas suggests that several novel species might still be undescribed in South Africa. Collectively, our results suggest that fine‐scale sampling is critical to detect and describe the biodiversity of other saproxylic taxa.

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Phylogenomic Analysis of Velvet Worms (Onychophora) Uncovers an Evolutionary Radiation in the Neotropics

Baker

Buckman-Young

Costa

et al. 2021

Molecular Biology and Evolution

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Onychophora (“velvet worms”) are charismatic soil invertebrates known for their status as a “living fossil”, their phylogenetic affiliation to arthropods, and their distinctive biogeographic patterns. However, several aspects of their internal phylogenetic relationships remain unresolved, limiting our understanding of the group’s evolutionary history, particularly with regard to changes in reproductive mode and dispersal ability. To address these gaps, we used RNA sequencing and phylogenomic analysis of transcriptomes to reconstruct evolutionary relationships and infer divergence times within the phylum. We recovered a fully resolved and well-supported phylogeny for the circum-Antarctic family Peripatopsidae, which retains signals of Gondwanan vicariance and showcases the evolutionary lability of reproductive mode in the family. Within the Neotropical clade of Peripatidae, though, we found that amino acid-translated sequence data masked nearly all phylogenetic signal, resulting in highly unstable and poorly supported relationships. Analyses using nucleotide sequence data were able to resolve many more relationships, though we still saw discordant phylogenetic signal between genes, probably indicative of a rapid, mid-Cretaceous radiation in the group. Finally, we hypothesize that the unique reproductive mode of placentotrophic viviparity found in all Neotropical peripatids may have facilitated the multiple inferred instances of over-water dispersal and establishment on oceanic islands.

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Panamanian velvet worms in the genus Epiperipatus, with notes on their taxonomy and distribution and the description of a new species (Onychophora, Peripatidae)

Cited by 5 publications

References 37 publications

Ngāokeoke Aotearoa: The Peripatoides Onychophora of New Zealand

Ngāokeoke Aotearoa: The Peripatoides Onychophora of New Zealand

Refining species boundaries among velvet worms (Onychophora, Peripatopsidae), with the description of two new species of Opisthopatus from South Africa

Phylogenomic Analysis of Velvet Worms (Onychophora) Uncovers an Evolutionary Radiation in the Neotropics

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