Two Mysterious Tiny Katydids from the Ecuadorian Andes (Orthoptera: Tettigoniidae: Hexacentrinae)

Braun, Holger

doi:10.1665/034.025.0209

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…While literature discussing the daily behavioral budgets of this genus of katydid is scarce, ample evidence exists from heterospecifics to demonstrate that nocturnalism is common among Tettigoniidae, with some species roosting and remaining nearly immobile during the day (Braun, 2011b(Braun, , 2016Greenfield, 1988;Lang & Römer, 2008). Our data and Saint Louis Zoo keepers' personal observations confirm the nocturnality of the Zoo's dragon-headed katydids as evidenced by higher activity and space usage at night.…”

Section: Discussionsupporting

confidence: 66%

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

2021

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Across the genera of katydids from the family Tettigoniidae, both diurnal and nocturnal species have been identified. The Saint Louis Zoo Bayer Insectarium filmed dragon-headed katydids (Lesina blanchardi) overnight using red light-emitting diodes (LEDs) to examine the activity of this presumed nocturnal species to provide quantitative information about these insects that are otherwise immobile when keepers are present. Evidence from the literature suggests that LED bulbs emitting long-wavelength red and infrared lights are less likely to cause changes to the subjects' behavioral budgets and movements through the habitat. Three katydids were filmed for 5 nights, and time-interval scan sampling was used to record their positions and whether they were active every 15 min for two 2-h periods starting at midnight and noon. A modified Shannon's diversity index determined that katydids were recorded in more areas when under only red LEDs at night as compared to artificial daytime working lights. Similarly, repeated measures analysis of variance indicated that insects were significantly more active under nighttime red LEDs when compared to daytime working lights. While we cannot be sure if behaviors recorded under red LEDs are the same as those that would be performed under total darkness in situ, the use of red LED illumination ex situ to facilitate overnight filming did not suppress nocturnal movement or activity for our subjects.

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Section: Discussionsupporting

confidence: 66%

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

2021

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“…A narrow ear canal reduces sound velocity and, along with its asymmetric bifurcation near the individual tympana, creates different sound paths for each ear, all of which could help to pinpoint the direction of the sound (Veitch et al 2021). Interestingly, the same rare combination of naked tympana and tiny spiracles is found in two species of Hexacentrinae (genus Nubimystrix), known also exclusively from the Andes of Ecuador and living in similar habitat (Braun 2016).…”

Section: Cestrophorine Signal Structurementioning

confidence: 99%

New species of awl-head katydids, Cestrophorus and Acanthacara, from the Andes of Ecuador (Orthoptera, Conocephalinae, Cestrophorini)

Braun¹,

Morris²

2022

JOR

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The Cestrophorini are small katydids of Ecuador’s montane rainforest bearing a prominent awl-shaped fastigium verticis. They are unusual among Conocephalinae in lacking pre-tympanic ear chambers: their eardrums are exposed on their fore tibiae. There are presently two genera, Cestrophorus Redtenbacher, 1891 and Acanthacara Scudder, 1869. Awl-head habitat includes both climax forest and anthropogenically disturbed areas (e.g., pastures, roadsides) on lower slopes in the drainage of the volcanoes Aliso, Chiles and Tungurahua. At night, males perch on low vegetation and stridulate to attract females. To three extant species, we add a further seven, two in Cestrophorus and five in Acanthacara. Male calling songs were recorded and analyzed for all three Cestrophorus species and for three of the Acanthacara spp. We describe and discuss the waveforms of their sinusoid and transient sound pulses in time and frequency domains.

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Studies on raspy crickets: New Triaenogryllacris species (Orthoptera: Gryllacrididae)

Cadena-Castañeda

Díaz

Rodríguez

et al. 2020

Zootaxa

844

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The genus Triaenogryllacris is redescribed and a key for identification of the species is provided. When dealing with observations of iNaturalist, accurate data about the distribution of T. triaena (the type species) are obtained, and three color forms are indicated: yellow, pink and green. Two new species are described here: T. diaena n. sp. and T. horaciotrianai n. sp., expanding the expected geographic distribution for the genus, thus recorded, from the Andean forests of Ecuador and Colombia’s three mountain ranges. Finally, the characters and distribution of Triaenogryllacris are discussed, contrasting with the other taxa described for the family Gryllacrididae.

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Two Mysterious Tiny Katydids from the Ecuadorian Andes (Orthoptera: Tettigoniidae: Hexacentrinae)

Cited by 4 publications

References 16 publications

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

New species of awl-head katydids, Cestrophorus and Acanthacara, from the Andes of Ecuador (Orthoptera, Conocephalinae, Cestrophorini)

Studies on raspy crickets: New Triaenogryllacris species (Orthoptera: Gryllacrididae)

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Two Mysterious Tiny Katydids from the Ecuadorian Andes (Orthoptera: Tettigoniidae: Hexacentrinae)

Cited by 4 publications

References 16 publications

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

Documenting nocturnal activity of dragon‐headed katydids (Lesina blanchardi) under artificial light

﻿New species of awl-head katydids, Cestrophorus and Acanthacara, from the Andes of Ecuador (Orthoptera, Conocephalinae, Cestrophorini)

Studies on raspy crickets: New Triaenogryllacris species (Orthoptera: Gryllacrididae)

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Product

Resources

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New species of awl-head katydids, Cestrophorus and Acanthacara, from the Andes of Ecuador (Orthoptera, Conocephalinae, Cestrophorini)