Integrative species delimitation reveals cryptic diversity in the southern Appalachian Antrodiaetus unicolor (Araneae: Antrodiaetidae) species complex

2020 ◽  
Vol 29 (12) ◽  
pp. 2269-2287 ◽  
Author(s):  
Lacie G. Newton ◽  
James Starrett ◽  
Brent E. Hendrixson ◽  
Shahan Derkarabetian ◽  
Jason E. Bond
Keyword(s):  
Species Delimitation ◽  
Species Complex ◽  
Cryptic Diversity ◽  
Southern Appalachian

Multilocus coalescent species delimitation reveals widespread cryptic differentiation among Drakensberg mountain-living freshwater crabs (Decapoda : Potamonautes)

2016 ◽  
Vol 30 (1) ◽  
pp. 60 ◽  
Author(s):  
Ethel Emmarantia Phiri ◽  
Savel Regan Daniels
Keyword(s):  
Species Delimitation ◽  
Species Complex ◽  
Recent Common Ancestor ◽  
12S Rrna ◽  
Mountain Range ◽  
28S Rrna ◽  
Cryptic Diversity ◽  
Most Recent Common Ancestor ◽  
Freshwater Crabs ◽  
Conservation Implications

Cryptic lineages present major challenges for evolutionary and conservation studies, particularly where these lineages remain undiscovered. Freshwater crabs are known to harbour cryptic diversity, in most cases with limited morphological differences. During the present study, we used a multilocus (12S rRNA, 16S rRNA, COI, 28S rRNA, DecapANT and PEPCK) Bayesian species delimitation to examine cryptic diversity within a freshwater crab species complex (Potamonautes clarus/P. depressus). We sampled 25 highland rivers in the Tugela and uMkomazi River drainage systems of the Drakensberg Mountain range, in the KwaZulu–Natal province of South Africa. Our results showed there to be at least eight lineages: six novel potamonautid freshwater crabs, and two described taxa P. clarus and P. depressus. Divergence from the most recent common ancestor occurred between the mid- and late Miocene (12.1 Mya), while divergence within the species complex occurred ~10.3 Mya up until the Holocene (0.11 Mya). The discovery of six novel lineages of freshwater crabs from a seemingly restricted distribution range has conservation implications, but to date most conservation planning strategies have focussed on freshwater vertebrates. By conducting a fine-scale phylogenetic survey using invertebrates, this study provides a platform for the inclusion of freshwater invertebrates in future conservation assessments.

Phylogenomics and molecular species delimitation reveals great cryptic diversity of leaf-toed geckos (Phyllodactylidae: Phyllodactylus), ancient origins, and diversification in Mexico

2020 ◽  
Vol 150 ◽  
pp. 106880
Author(s):  
Tonatiuh Ramírez-Reyes ◽  
Christopher Blair ◽  
Oscar Flores-Villela ◽  
Daniel Piñero ◽  
Amy Lathrop ◽  
...  
Keyword(s):  
Molecular Species ◽  
Species Delimitation ◽  
Cryptic Diversity

scholarly journals Densely sampled phylogenetic analyses of the Lesser Short‐toed Lark ( Alaudala rufescens ) — Sand Lark ( A. raytal ) species complex (Aves, Passeriformes) reveal cryptic diversity

2020 ◽  
Vol 49 (4) ◽  
pp. 427-439 ◽  
Author(s):  
Fatemeh Ghorbani ◽  
Mansour Aliabadian ◽  
Ruiying Zhang ◽  
Martin Irestedt ◽  
Yan Hao ◽  
...  
Keyword(s):  
Species Complex ◽  
Phylogenetic Analyses ◽  
Cryptic Diversity

scholarly journals Species delimitation in the Stenocereus griseus (Cactaceae) species complex reveals a new species, S. huastecorum

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0190385 ◽  
Author(s):  
Hernán Alvarado-Sizzo ◽  
Alejandro Casas ◽  
Fabiola Parra ◽  
Hilda Julieta Arreola-Nava ◽  
Teresa Terrazas ◽  
...  
Keyword(s):  
New Species ◽  
Species Delimitation ◽  
Species Complex ◽  
A New Species

Atlas of leaf surface micromorphology in Aloe L. (Asphodelaceae) from the Horn of Africa region

Phytotaxa ◽  
2021 ◽  
Vol 524 (4) ◽  
pp. 261-282
Author(s):  
ESHETU FENTAW ◽  
KELDA F.V.A. ELLIOTT ◽  
SEBSEBE DEMISSEW ◽  
DAVID CUTLER ◽  
OLWEN M. GRACE
Keyword(s):  
Species Delimitation ◽  
Plant Material ◽  
Species Complex ◽  
Leaf Surface ◽  
Detailed Comparison ◽  
Species Variation ◽  
Leaf Epidermis ◽  
Horn Of Africa ◽  
Surface Micromorphology ◽  
Leaf Surface Micromorphology

The confident identification to species rank of fragmentary and sterile plant material is often challenged by the absence of diagnostic characters, which are present in intact specimens, reproductive parts, and plants in habitat. Here, we consider leaf surface micromorphology for the identification of the genus Aloe in the Horn of Africa region. Primary and secondary sculpturing of the leaf epidermis and stomata were characterised from SEM micrographs of 35 taxa representing 31 species of Aloe (Asphodelaceae subfam. Alooideae). Detailed comparison revealed that leaf surface characters are conserved between species and within-species variation is modest. Closely related taxa in the Aloe adigratana—A. camperi—A. sinana species complex could be distinguished using leaf surface micromorphology alone. These characters also guide species delimitation; in the species complex including A. schoelleri and A. steudneri, a narrow circumscription is supported, whereas with A. ankoberensis and A. pulcherrima, a wider circumscription merits consideration. The observed trait combinations are characteristic of plants in xeric environments, with the most notable feature being stomata that are most deeply sunken in species in more arid habitats. Our findings support the use of comparative study of micromorphological leaf surface characters for species identification and taxonomy in the genus Aloe.

scholarly journals Correction to: Enlightening the black and white: species delimitation and UNITE species hypothesis testing in the Russula albonigra species complex

IMA Fungus ◽  
2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ruben De Lange ◽  
Slavomír Adamčík ◽  
Katarína Adamčíkova ◽  
Pieter Asselman ◽  
Jan Borovička ◽  
...  
Keyword(s):  
Hypothesis Testing ◽  
Species Delimitation ◽  
Species Complex ◽  
Black And White

scholarly journals Uncovering hidden specific diversity of Andean glassfrogs of theCentrolene buckleyispecies complex (Anura: Centrolenidae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5856 ◽  
Author(s):  
Luis Amador ◽  
Andrés Parada ◽  
Guillermo D’Elía ◽  
Juan M. Guayasamin
Keyword(s):  
Species Delimitation ◽  
Species Complex ◽  
Behavioral Data ◽  
Nuclear Markers ◽  
Evolutionary Significant Units ◽  
Candidate Species

The glassfrogCentrolene buckleyihas been recognized as a species complex. Herein, using coalescence-based species delimitation methods, we evaluate the specific diversity within this taxon. Four coalescence approaches (generalized mixed Yule coalescents, Bayesian general mixed Yule-coalescent, Poisson tree processes, and Bayesian Poisson tree processes) were consistent with the delimitation results, identifying four lineages within what is currently recognized asC. buckleyi. We propose three new candidate species that should be tested with nuclear markers, morphological, and behavioral data. In the meantime, for conservation purposes, candidate species should be considered evolutionary significant units, in light of observed population crashes in theC. buckleyispecies complex. Finally, our results support the validity ofC. venezuelense, formerly considered as a subspecies ofC. buckleyi.

scholarly journals In the shadows: Phylogenomics and coalescent species delimitation unveil cryptic diversity in a Cerrado endemic lizard (Squamata: Tropidurus)

2017 ◽  
Vol 107 ◽  
pp. 455-465 ◽  
Author(s):  
Fabricius M.C.B. Domingos ◽  
Guarino R. Colli ◽  
Alan Lemmon ◽  
Emily Moriarty Lemmon ◽  
Luciano B. Beheregaray
Keyword(s):  
Species Delimitation ◽  
Cryptic Diversity
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