Latest Articles from Journal of Orthoptera Research Latest 2 Articles from Journal of Orthoptera Research https://jor.pensoft.net/ Fri, 29 Mar 2024 14:06:01 +0200 Pensoft FeedCreator https://jor.pensoft.net/i/logo.jpg Latest Articles from Journal of Orthoptera Research https://jor.pensoft.net/ Geographic variation in the calling songs and genetics of Bartram’s round-winged katydid Amblycorypha bartrami (Tettigoniidae, Phaneropterinae) reveal new species https://jor.pensoft.net/article/96295/ Journal of Orthoptera Research 32(2): 153-170

DOI: 10.3897/jor.32.96295

Authors: Timothy G. Forrest, Micaela Scobie, Olivia Brueckner, Brittania Bintz, John D. Spooner

Abstract: Previous work on Bartram’s round-winged katydid, Amblycorypha bartrami Walker, found inconsistencies in song variation across the species’ range. Individuals of purported populations of A. bartrami from sandhills across the southeastern US were collected, recorded, and their genes were sequenced to better understand their population structure and evolution. Significant differences in songs, morphology, and genetics were found among populations from Alabama (AL), Georgia (GA), North Carolina (NC), and South Carolina (SC), and they differed from those of individuals collected from the type locality in Florida (FL). Males from all populations produced songs composed of a series of similar syllables, but they differed in the rates at which syllables were produced as a function of temperature. At temperatures of 25°C, the calling songs of males from populations in northern AL and GA were found to have the highest syllable rates, those from SC had the lowest rates, and those from NC were found to produce songs with doublet syllables at rates that were intermediate between those of males from FL and those of AL and GA. These song differences formed the basis for cluster analyses and principal component analyses, which showed significant clustering and differences in song spectra and morphology among the song morphs. A Bayesian multi-locus, multi-species coalescent analysis found significant divergences from a panmictic population for the song morphs. Populations from GA and AL are closely related to those of A. bartrami in FL, whereas populations from NC and SC are closely related to each other and differ from the other three. Large river systems may have been important in isolating these populations of flightless katydids. Based on the results of our analyses of songs, morphology, and genetics, three new species of round-winged katydids from the southeastern coastal plain and piedmont are described.

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Research Article Thu, 21 Sep 2023 16:58:16 +0300
Phylogenetic relationship of Japanese Podismini species (Orthoptera: Acrididae: Melanoplinae) inferred from a partial sequence of cytochrome c oxidase subunit I gene https://jor.pensoft.net/article/14547/ Journal of Orthoptera Research 26(1): 11-19

DOI: 10.3897/jor.26.14547

Authors: Beata Grzywacz, Haruki Tatsuta

Abstract: Members of the tribe Podismini (Orthoptera: Acrididae: Melanoplinae) are distributed mainly in Eurasia and the western and eastern regions of North America. The primary aim of this study is to explore the phylogenetic relationship of Japanese Podismini grasshoppers by comparing partial sequences of cytochrome c oxidase subunit I (COI) mitochondrial gene. Forty podismine species (including nineteen Japanese species) and thirty-seven species from other tribes of the Melanoplinae (Dactylotini, Dichroplini, Melanoplini, and Jivarini) were used in the analyses. All the Japanese Podismini, except Anapodisma, were placed in a well-supported subclade. However, our results did not correspond with the classification on the basis of morphological similarity for the status of Tonkinacridina. This group of Japanese species constituted a single clade with other species of Miramellina and Podismina, while Eurasian continental species of Tonkinacridina were placed in other separate clades. This incongruence might have resulted from historical migratory events between continent and ancient islands and subsequent convergent/parallel evolution in morphology. Some remarks on phylogenetic positions in Podismini and other tribes were also made in terms of reconstructed phylogeny.

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Research Article Wed, 28 Jun 2017 14:30:16 +0300