Grey T Gustafson

Grey T Gustafson
Northern Arizona University | NAU · Department of Biological Sciences

PhD, University of New Mexico

About

67
Publications
15,345
Reads
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297
Citations
Introduction
My research program is broadly focused on expanding our understanding of adephagan beetle systematics and beetle evolution and diversity. Specifically, I center my research around two primary foci: (1) documenting adephagan beetle biodiversity, including the discovery of new species and the identification of taxa of conservation concern, and (2) reconstructing the evolutionary history of select groups of beetles using integrative approaches to investigate diversification processes.
Additional affiliations
August 2020 - present
Northern Arizona University
Position
  • Professor (Assistant)
August 2016 - June 2020
University of Kansas
Position
  • PostDoc Position
Education
August 2010 - May 2016
University of New Mexico
Field of study
  • Biology
August 2005 - May 2010
University of Kansas
Field of study
  • Ecology and Evolution

Publications

Publications (67)
Article
Full-text available
The temporal origin of Madagascar's extraordinary endemic diversity is debated. A preference for Cenozoic dispersal origins has replaced the classical view of Mesozoic vicariance in the wake of molecular dating. However, evidence of ancient origins is mounting from arthropod groups. Using phylogenetic 'tip-dating' analysis with fossils, we show tha...
Article
Abstract. Adephaga is the second largest suborder of beetles (Coleoptera) and they serve as important arthropod predators in both aquatic and terrestrial ecosystems. The suborder is divided into Geadephaga comprising terrestrial families and Hydradephaga for aquatic lineages. Despite numerous studies, phylogenetic relationships among the adephagan...
Article
Full-text available
Targeted capture and enrichment approaches have proven effective for phylogenetic study. Ultraconserved elements (UCEs) in particular have exhibited great utility for phylogenomic analyses, with the software package phyluce being among the most utilized pipelines for UCE phylogenomics, including probe design. Despite the success of UCEs, it is beco...
Article
Eighteen species and four genera of the family Gyrinidae are recorded from Thailand. Seven species, belonging to three genera in the tribes Dineutini and Gyrinini, are here treated in detail. Dineutus sitesi Gustafson, Hájek & Miller, D. spinosus (Fabricius), D. unidentatus Aubé, Porrorhynchus marginatus Laporte and Gyrinus sericeolimbatus Régimbar...
Article
Full-text available
We review Dineutus helleri Ochs, 1925, a whirligig beetle species endemic to New Guinea’s north coast mountains. Its diagnostic characters are illustrated for easy species identification. We provide a summary and geographic interpretation of historical records, provide new records and, for the first time, habitat photographs for the subspecies D. h...
Article
Full-text available
Whirligig beetles (Coleoptera: Gyrinidae) are among the best swimmers of all aquatic insects. They live mostly at the water’s surface and their capacity to swim fast is key to their survival. We present a minimal model for the viscous and wave drags they face at the water’s surface and compare them to their thrust capacity. The swimming speed acces...
Article
Beetles are arguably the most diverse group of animals on Earth with over 400 000 described species. Yet the timing of main diversification events among these insects remains debated. The use of phylogenomic data generated using next‐generation sequencing recently resolved most recalcitrant phylogenetic relationships across Coleoptera. However, lim...
Article
A survey of the whirligig beetles of the genus Patrus Aubé, 1838 occurring in Thailand belonging to the newly designated Patrus landaisi species group is presented. Three new species are described and illustrated: P. garuda sp. nov., P. nanensis sp. nov. and P. phetchabunensis sp. nov.; with P. apicalis (Régimbart, 1891), P. landaisi (Régimbart, 18...
Article
Burmese amber is well known for preserving unique extinct lineages of insects. Here, we describe a new fossil beetle in its larval stage from Burmese amber. Bayesian and parsimony phylogenetic analysis of 50 morphological characters support this fossil as being sister to both the tribes Dineutini and Orectochilini, representing an extinct stem line...
Article
Full-text available
Diving beetles in the genus Platynectes (s. str.) in South America are relatively large and charismatically colored, yet relatively rare in museum collections. Recent fi eldwork in northern and central South America has resulted in the collection of hundreds of new specimens that substantially expand our distributional knowledge of the genus. Here,...
Article
Hydaticus aequalis sp. n. is described from Brazil, where it was recently discovered in the central lowlands region of the Amazon forest. The new species differs from all other Neotropical congeners by its uniformly brown dorsal surface and the shape of medial lobe. The dorsal habitus and male genitalia are illustrated, and a distribution map is pr...
Article
Burmese amber is well known for preserving unique extinct lineages of insects. Here, we describe a new fossil beetle in its larval stage from Burmese amber. Bayesian and parsimony phylogenetic analysis of 50 morphological characters support this fossil as being sister to both the tribes Dineutini and Orectochilini, representing an extinct stem line...
Article
Full-text available
A unique feature among bees is the ability of some species of Megachile Latreille s.l. to cut and process fresh leaves for nest construction. The presence of a razor between the female mandibular teeth (interdental laminae) to facilitate leaf-cutting (LC) is a morphological novelty that might have triggered a subsequent diversification in this grou...
Preprint
A unique feature among bees is the ability of some species of Megachile s.l. to cut and process fresh leaves for nest construction. The presence of razors between the female mandibular teeth (interdental laminae) to facilitate leaf-cutting (LC) is a morphological novelty that might have triggered a subsequent diversification in this group. However,...
Article
Full-text available
The whirligig beetle genus Aulonogyrus Motschulsky, 1853 comprises more than fifty species divided among five subgenera. The genus has high endemicity in southern Africa, with additional endemic species found on Madagascar, Australia, and New Caledonia. This distribution has been proposed to be of Gondwanan origin. In Africa and Madagascar, species...
Article
Full-text available
The Venezuelan species of the genus Gyrinus Geoffroy, 1762 are reviewed (Gyrinidae: Gyrininae: Gyrinini). The Venezuelan Gyrinus fauna is found to be comprised of nine species distributed among the subgenera Neogyrinus Hatch, 1926 and Oreogyrinus Ochs, 1935, although Gyrinus (Oreogyrinus) colombicus Régimbart, 1883 is known from imprecisely localiz...
Article
Full-text available
The larvae of the Malagasy whirligig beetle Dineutus sinuosipennis Laporte, 1840, identified using DNA sequence data, are described and illustrated for the first time, including detailed morphometric and chaetotax-ic analyses of selected structures and a description of larval habitat. Larvae of the genus Dineutus Macleay, 1825 are diagnosed, and a...
Preprint
A new species of Dineutus Macleay, 1825 is described from the Southeastern CoastalPlain of the United Sates. Habitus and aedeagus images as well as illustrations of elytralapices, protarsus, palps, and male mesopretarsal claws are provided for Dineutus shorti n.sp. and compared to those of D. discolor Aubé, 1838. The importance of theSoutheastern C...
Article
Full-text available
The Malagasy endemic whirligig beetle Heterogyrus milloti Legros, 1953 is redescribed. Jumping behavior of H. milloti is reported here for the first time with video recordings provided. Results of a behavioral experiment conducted in the field demonstrate H. milloti jumps in a targeted manner in a downstream direction. The unique habitat of H. mill...
Article
Full-text available
The beetle suborder Adephaga has been the subject of many phylogenetic reconstructions utilizing a variety of data sources and inference methods. However, no strong consensus has yet emerged on the relationships among major adephagan lineages. Ultraconserved elements (UCEs) have proved useful for inferring difficult or unresolved phylogenies at var...
Article
The phylogeny and evolutionary history of the whirligig beetle tribe Dineutini are inferred from the analysis of 56 morphological characters and DNA sequence data from the mitochondrial gene fragments COI, COII and 12S, and the nuclear gene fragments H3 and arginine kinase. Bayesian and maximum likelihood analyses were performed. A Bayesian tip-dat...
Article
The egg case and larvae of all three instars of the cascade beetle Tritonus complanatus Short, 2008 (Coleoptera: Hydrophilidae) are described based on specimens found co-occurring with adults and associated with them by comparing histone 3 nDNA sequences. The morphology of the larva is congruent with the phylogenetic position of Tritonus Mulsant, 1...
Article
Full-text available
The Southeast Asian whirligig beetle genus Porrorhynchus Laporte, 1835 is revised. The genus is composed of five species, P. depressus Régimbart, 1892, P. indicans (Walker, 1858), P. landaisi Régimbart, 1892, P. marginatus Laporte, 1835, and P. misoolensis (Ochs, 1955), new status, and two subgenera, Porrorhynchus s. str. and Rhomborhynchus Ochs, 1...
Article
Full-text available
Two new species of Dineutus Macleay, 1825 (Coleoptera: Gyrinidae) are described and illustrated: Dineutus barong sp. nov. from Bali, Indonesia and Dineutus sitesi sp. nov. from Thailand. A checklist to the species of the Dineutus s. str. is provided, as is a key to the species currently recognized in the subgenus together with illustrations of habi...
Article
Full-text available
The Neotropical species of Platynectes Régimbart, 1879 sensu stricto (Coleoptera: Dytiscidae: Agabinae: Platynectini) are arranged into three newly proposed species groups based on the coloration of the venter: the P. submaculatus species group, the P. agallithoplotes species group, and the P. nigerrimus species group. The species of the P. submacu...
Article
The larvae of the grooved whirligig beetle Macrogyrus oblongus (Boisduval, 1835) are described and illustrated including detailed morphometric and chaetotaxic analyses of selected structures. Larvae of Macrogyrus Régimbart, 1882 exhibit the characters traditionally recognised as autapomorphies of the Gyrinidae. The first instars bear egg bursters o...
Article
A new species of Dineutus Macleay, 1825 is described from the Southeastern Coastal Plain of the United States. Habitus and aedeagus images as well as illustrations of elytral apices, protarsus, palps, and male mesotarsal claws are provided for Dineutus shorti n. sp. and compared to those of D. discolor Aubé, 1838. The importance of the southeastern...
Article
Full-text available
All New World members of the whirligig beetle genus Dineutus Macleay, 1825 are treated. The New World Dineutus are found to be composed of 18 species and 6 subspecies: one species, Dineutus mexicanus Ochs, 1925, stat. n. is elevated from subspecies to species rank, and the subspecies Dineutus carolinus mutchleri Ochs, 1925, syn. n. is synonymized h...
Article
Full-text available
BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological,...
Article
Full-text available
How many species of beetles are there in French Guiana? A first analysis of TAXREF database. This paper analyzes the Coleoptera part of the first global checklist of insects from French Guiana, up to the end of 2013, published online in the French species database TAXREF (http://inpn.mnhn.fr). We describe the level of knowledge by family, the pace...
Article
Full-text available
The burrowing water beetle genus Liocanthydrus Guignot, 1957 is redefined and its species are revised. Of the four current species, three are recognized as belonging to the genus and redescribed: L. angustus (Guignot, 1957), L. octoguttatus (Zimmermann, 1921) and L. uniformis (Zimmermann, 1921). The fourth species, L. buqueti (Laporte, 1835) is fou...
Article
Full-text available
All available genus- and family- group nomina for the Gyrinidae (Coleoptera: Adephaga) are listed along with original citation, original and current status, type nominal taxon with method of designation, and known synonymies and incorrect subsequent spellings. The nomina included follow the most current classification. Discussion is provided clarif...
Conference Paper
Within Gyrinidae, the tribe Enhydrini is predominantly composed of large and conspicuous whirligig beetles that frequent a variety of habitats from lotic to lentic waters. Of the enhydrines, the Indo-Pacific genus Porrorhynchus is one of the most charismatic members, with several species representing the largest of the known whirligig beetles. Desp...
Article
Full-text available
The water scavenger beetle genus Phaenostoma d'Orchymont, 1937 is reviewed and redescribed. Two new species are described: P. kontax sp. nov. (Peru) and P. stochasma sp. nov. (Costa Rica, Venezuela). The only previously known species, P. posticatum (Sharp, 1887) is newly recorded from Costa Rica and redescribed. A key to known species of the genus...
Article
The genus Guyanobius Spangler, 19862. Spangler , P. J. 1986 . ‘A new genus and species of water scavenger beetle, Guyanobius adocetus, from Guyana and its larva (Coleoptera: Hydrophilidae: Hydrobiinae)’ . Proceedings of the Entomological Society of Washington , 88 : 585 – 594 . [Web of Science ®]View all references is revised and expanded. Two spec...
Article
Full-text available
Ampullae appear to be common in the larvae of some chrysomelid subfamilies. We describe and discuss the occurrence and use of these structures in larvae of Labidomera clivicollis (Kirby), on its host plant Asclepias verticillata L. (Asclepiadaceae) under field and lab conditions. Through film footage, we reveal that ventral ampullae are apparent on...

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Projects

Projects (4)
Project
To study the larval morphology of the family Gyrinidae at a worldwide scale, with the following long-term goals: 1) to make larvae of all gyrinid genera known to science by providing detailed descriptions including chaetotaxic analysis; 2) to develop a system of nomenclature for larval primary chaetotaxy; 3) to develop a generic key to larvae, both in traditional and interactive formats; and 4) to study the phylogenetic signal provided by larval characters for the generic classification of the family.
Project
Construct a molecular phylogeny of the Gyrinini and perform biogeographic analyses to elucidate the origins and historical biogeography of the group.