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"Spooner, John D"
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Geographic variation in the calling songs and genetics of Bartram’s round-winged katydid Amblycorypha bartrami (Tettigoniidae, Phaneropterinae) reveal new species
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.
Journal Article
Stolonicyclops heggiensis, New Genus, New Species, from Georgia, U.S.A. (Copepoda: Cyclopoida: Cyclopidae)
A previously unknown genus and species of cyclopoid copepod, Stolonicyclops heggiensis, was discovered in seepage areas on Heggie's Rock, a granite monadnock in Georgia, U.S.A. The genus is characterized by leg 5 fused to the somite, with 1 dorsal seta and 2 ventral setae on a small knob; the antennule of 11 segments in the female; the swimming legs with 2-segmented rami, except leg 4 endopodite segments partly fused in the female; the spine and seta formulae of swimming legs 2,3,3,3 and 5,4,4,4, respectively; the lack of a seta on the medial (inner) corner of the coxopodite of legs 2-4; leg 4 endopodite segment 2 with 5 appendages; and the lack of sexual dimorphism in the swimming legs, except for the difference in leg 4 endopodite fusion. In several respects, S. heggiensis resembles Bryocyclops (Palaeocyclops) jankowskajae Monchenko from Kazakhstan and Uzbekistan. However, the lack of modified appendages of leg 3 in the male of S. heggiensis precludes assigning it to the genus Bryocyclops. The nature of leg 3 of the male and other plesiomorphic characters of S. heggiensis may indicate that its ancestor diverged earlier than Palaeocyclops from the Bryocyclops ancestral line.
Journal Article
Invest in growth companies? Nah
The stock market is driven by two things: fear and greed. They determine the areas of investing that are popular and ignore the rest. When an area of investing is out of favor, you can't give it away.
Magazine Article
Pair-Forming Phonotaxic Strategies of Phaneropterine Katydids (Tettigoniidae: Phaneropterinae)
Species of Phaneropterinae form sexual pairs as a result of males and/or females moving toward the sounds produced by the opposite sex. A heretofore undetermined pair-forming phonotaxic strategy is described in which conspecific males and females simultaneously move toward constant intensity sounds produced by the opposite sex. This contrasts to three previously described phonotaxic strategies, in which only the male or the female moves at a given time, and in which differences in sound intensity may elicit different responses.
Journal Article
How to help your kids learn about money
Maybe a student's mother or father in financial services visits a classroom for half an hour of show and tell on stocks, bonds, and the financial markets. [...]you tell them a bit about the stock market, how companies allow money to grow and prosper, and how they can benefit if they buy shares in the right areas.
Newspaper Article
Microcentrum latifrons, a new species of angular-winged katydid from southwestern United States (Orthoptera, Tettigoniidae, Phaneropterinae)
A new species of the genus Microcentrum is described from southwestern United States. Important contrasts are made with the partially sympatric species M. rhombifolium and M. californicum.
Journal Article