scholarly journals Transcriptome phylogenies support ancient evolutionary transitions in bioluminescence traits of cypridinid ostracods

2021 ◽  
Author(s):  
Emily A. Ellis ◽  
Jessica A. Goodheart ◽  
Nicholai M. Hensley ◽  
Vanessa L. González ◽  
Nicholas J. Reda ◽  
...  
Keyword(s):  
Molecular Evolution ◽  
Molecular Phylogeny ◽  
Divergence Times ◽  
Evolutionary Transitions ◽  
Single Origin ◽  
Molecular Phylogenetic ◽  
The Caribbean ◽  
Character Mapping ◽  
Molecular Phylogenetic Data ◽  
Relaxed Clock

AbstractBioluminescence evolved many times independently, leading to dramatic effects on ecosystems by influencing communication both within and between species. One origin of bioluminescence is within cypridinid ostracods. Bioluminescent cypridinids probably all use light as an anti-predator display, while a subset that diversified in the Caribbean also use light for courtship signaling. Despite their importance for understanding the evolution of bioluminescence, very little molecular phylogenetic data are available for cypridinids and the timing of evolutionary transitions of luminous traits is poorly understood. Here, we estimate the first transcriptome-based molecular phylogeny and divergence times of Cypridinidae. Our results strongly support previous hypotheses of a single origin of bioluminescent courtship signaling, nested within a single origin of bioluminescence, and the secondary loss of courtship signaling in Vargula tsujii. We propose the name Luminini for the Tribe of bioluminescent cypridinids and Luxorina for the Sub-tribe of cypridinids with courtship signaling. Our relaxed-clock estimates of divergence times coupled with stochastic character mapping show luminous courtship evolved at least 151 Million Years Ago (MYA) and cypridinid bioluminescence originated at least 197 MYA, making it one of the oldest documented origins of bioluminescence. The molecular phylogeny of cypridinids will serve as a foundation for integrative and comparative studies on the biochemistry, molecular evolution, courtship, diversification, and ecology of cypridinid bioluminescence.

A new species ofRimicaris(Crustacea: Decapoda: Caridea: Alvinocarididae) from hydrothermal vent fields on the Mid-Cayman Spreading Centre, Caribbean

2011 ◽  
Vol 92 (5) ◽  
pp. 1057-1072 ◽  
Author(s):  
Verity Nye ◽  
Jon Copley ◽  
Sophie Plouviez
Keyword(s):  
New Species ◽  
Ribosomal Rna ◽  
Hydrothermal Vent ◽  
Caribbean Sea ◽  
Molecular Evidence ◽  
Mitochondrial Coi ◽  
Molecular Phylogenetic ◽  
The Caribbean ◽  
A New Species ◽  
Molecular Phylogenetic Data

Rimicaris hybisaesp. nov. is described from hydrothermal vent fields on the world's deepest seafloor spreading centre, the Mid-Cayman Spreading Centre (MCSC), Caribbean, at depths of 2300–4960 m. The new species is described and illustrated on the basis of 17 specimens. Brief notes on the distribution and habitat of the new species are provided. Molecular phylogenetic data from mitochondrial COI (460 base pair (bp)), 16S ribosomal RNA (549 bp) and nuclear 18S ribosomal RNA (576 bp) regions is used to complement the description. Morphological variation withinR. hybisaesp. nov. and morphological affinities with previously described species are discussed. Based on morphological and molecular evidence, the new species is provisionally assigned to the genusRimicaris, and differs from all known species in the genus by a distinctive pair of ‘pores' on the posterior lobes of its four-lobed dorsal organ. An emended diagnosis forRimicarisis provided.Rimicaris hybisaesp. nov. is the first taxon to be described from MCSC vent fields. This record extends the known geographical range ofRimicarisinto the Caribbean Sea and constitutes the deepest documented occurrence of alvinocaridid shrimp.

Molecular phylogeny of Pholadoidea Lamarck, 1809 supports a single origin for xylotrophy (wood feeding) and xylotrophic bacterial endosymbiosis in Bivalvia

2011 ◽  
Vol 61 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Daniel L. Distel ◽  
Mehwish Amin ◽  
Adam Burgoyne ◽  
Eric Linton ◽  
Gustaf Mamangkey ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Single Origin

Floral ontogeny of Aeschynomene falcata and A. sensitiva (Leguminosae: Papilionoideae) supports molecular phylogenetic data

2012 ◽  
Vol 299 (3) ◽  
pp. 499-513 ◽  
Author(s):  
Diana Salles Sampaio ◽  
Maria Cecília de Chiara Moço ◽  
Jorge Ernesto Araujo Mariath
Keyword(s):  
Floral Ontogeny ◽  
Phylogenetic Data ◽  
Molecular Phylogenetic ◽  
Molecular Phylogenetic Data

scholarly journals Trends in flower symmetry evolution revealed through phylogenetic and developmental genetic advances

2014 ◽  
Vol 369 (1648) ◽  
pp. 20130348 ◽  
Author(s):  
Lena C. Hileman
Keyword(s):  
Bilateral Symmetry ◽  
Radial Symmetry ◽  
Plant Evolution ◽  
Flowering Plant ◽  
Developmental Studies ◽  
Developmental Genetic ◽  
Evolutionary Transitions ◽  
Flower Symmetry ◽  
Molecular Phylogenetic ◽  
Developmental Programme

A striking aspect of flowering plant (angiosperm) diversity is variation in flower symmetry. From an ancestral form of radial symmetry (polysymmetry, actinomorphy), multiple evolutionary transitions have contributed to instances of non-radial forms, including bilateral symmetry (monosymmetry, zygomorphy) and asymmetry. Advances in flowering plant molecular phylogenetic research and studies of character evolution as well as detailed flower developmental genetic studies in a few model species (e.g. Antirrhinum majus , snapdragon) have provided a foundation for deep insights into flower symmetry evolution. From phylogenetic studies, we have a better understanding of where during flowering plant diversification transitions from radial to bilateral flower symmetry (and back to radial symmetry) have occurred. From developmental studies, we know that a genetic programme largely dependent on the functional action of the CYCLOIDEA gene is necessary for differentiation along the snapdragon dorsoventral flower axis. Bringing these two lines of inquiry together has provided surprising insights into both the parallel recruitment of a CYC -dependent developmental programme during independent transitions to bilateral flower symmetry, and the modifications to this programme in transitions back to radial flower symmetry, during flowering plant evolution.

Iljinskaea (Brassicaceae), a new genus based on Conringia planisiliqua

Phytotaxa ◽  
2021 ◽  
Vol 500 (2) ◽  
pp. 142-146
Author(s):  
IHSAN A. AL-SHEHBAZ ◽  
BARIŞ ÖZÜDOĞRU ◽  
DMITRY A. GERMAN
Keyword(s):  
New Genus ◽  
Critical Evaluation ◽  
New Combination ◽  
Phylogenetic Data ◽  
Molecular Phylogenetic ◽  
Molecular Phylogenetic Data

Iljinskaea is described as a new monospecific genus based on a critical evaluation of morphology and in light of the extensive molecular phylogenetic data. The new combination I. planisiliqua is proposed, and the distinguishing characters separating the new genus from Conringia are discussed. The new tribal assignment of Iljinskaea in the Isatideae is discussed and compared with the previous placement in the Conringieae.

Seed Plant Genera Endemic to the Caribbean Island Biodiversity Hotspot: A Review and a Molecular Phylogenetic Perspective

2007 ◽  
Vol 73 (3) ◽  
pp. 183-234 ◽  
Author(s):  
Javier Francisco-Ortega ◽  
Eugenio Santiago-Valentín ◽  
Pedro Acevedo-Rodríguez ◽  
Carl Lewis ◽  
John Pipoly ◽  
...  
Keyword(s):  
Biodiversity Hotspot ◽  
Seed Plant ◽  
Caribbean Island ◽  
Molecular Phylogenetic ◽  
Island Biodiversity ◽  
Phylogenetic Perspective ◽  
The Caribbean

Molecular phylogeny of Pemphiginae (Hemiptera: Aphididae) inferred from nuclear gene EF-1α sequences

2008 ◽  
Vol 98 (5) ◽  
pp. 499-507 ◽  
Author(s):  
H.C. Zhang ◽  
G.X. Qiao
Keyword(s):  
Phylogenetic Analysis ◽  
Molecular Phylogeny ◽  
Host Specificity ◽  
Nuclear Gene ◽  
Molecular Data ◽  
Molecular Phylogenetic Analysis ◽  
Phylogenetic Study ◽  
Primary Host ◽  
Molecular Phylogenetic Study ◽  
Molecular Phylogenetic

AbstractThree traditional tribes of Fordini, Pemphigini and Eriosomatini comprise Pemphiginae, and there are two subtribes in Fordini and Pemphigini, respectively. Most of the species in this subfamily live heteroecious holocyclic lives with distinct primary host specificity. The three tribes of Pemphigini (except Prociphilina), Eriosomatini and Fordini use three families of plants, Salicaceae (Populus), Ulmaceae (Ulums) and Anacardiaceae (Pistacia and Rhus), as primary hosts, respectively, and form galls on them. Therefore, the Pemphigids are well known as gall makers, and their galls can be divided into true galls and pseudo-galls in type. We performed the first molecular phylogenetic study of Pemphiginae based on molecular data (EF-1α sequences). Results show that Pemphiginae is probably not a monophylum, but the monophyly of Fordini is supported robustly. The monophyly of Pemphigini is not supported, and two subtribes in it, Pemphigina and Prociphilina, are suggested to be raised to tribal level, equal with Fordini and Eriosomatini. The molecular phylogenetic analysis does not show definite relationships among the four tribes of Pemphiginae, as in the previous phylogenetic study based on morphology. It seems that the four tribes radiated at nearly the same time and then evolved independently. Based on this, we can speculate that galls originated independently four times in the four tribes, and there is no evidence to support that true galls are preceded by pseudo-galls, as in the case of thrips and willow sawflies.

scholarly journals Taxonomic reassessment of the Indo-Pacific Scytosiphonaceae (Phaeophyceae): Hydroclathrus rapanuii sp. nov. and Chnoospora minima from Easter Island, with proposal of Dactylosiphon gen. nov. and Pseudochnoospora gen. nov.

2018 ◽  
Vol 61 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Wilfred John E. Santiañez ◽  
Erasmo C. Macaya ◽  
Kyung Min Lee ◽  
Ga Youn Cho ◽  
Sung Min Boo ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Phylogenetic Analyses ◽  
Easter Island ◽  
New Genera ◽  
Monotypic Genus ◽  
Southeastern Pacific ◽  
Molecular Phylogenetic ◽  
Thin Membranes ◽  
Hydroclathrus Clathratus ◽  
Molecular Phylogenetic Data

AbstractA new and putatively endemic species ofHydroclathrus,Hydroclathrus rapanuii, is described from the geographically isolated Easter Island in the southeastern Pacific based on morphological and molecular phylogenetic data. It is distinguished from otherHydroclathrusby thalli of unevenly furrowed thin membranes, and angular, block-like plurangial sori. Our phylogenetic analyses indicated thatH. rapanuiiis closely related to the generitypeHydroclathrus clathratus. We also report on the morphology and phylogeny ofChnoospora minimafrom Easter I. and elsewhere in the Indo-Pacific Ocean, noting the previously unreported presence of hollow portions in its medulla. Although not collected from Easter I., we herein propose the recognition of two new genera,Dactylosiphongen. nov. andPseudochnoosporagen. nov., based on our three-gene phylogeny and their known morphologies and anatomies.Dactylosiphonis based on the three species currently assigned toColpomenia(C. bullosa,C. durvillei, andC. wynnei) that are genetically and morphologically (i.e. thalli with erect and finger-like tubes arising from a common saccate base) distinct from other members ofColpomenia. The monotypic genusPseudochnoosporais represented by the decumbent, branching, and inter-adhesive species currently known asChnoospora implexa. With the above proposals, we further increase the genus-level diversity of Scytosiphonaceae in the Indo-Pacific Ocean.

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