Dennis Paulson

University of Puget Sound | UPS · Slater Museum of Natural History

The checklist includes all 471 species of North American Odonata (Canada and the continental United States) considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all...

Motivation Aquatic insects comprise 64% of freshwater animal diversity and are widely used as bioindicators to assess water quality impairment and freshwater ecosystem health, as well as to test ecological hypotheses. Despite their importance, a comprehensive, global database of aquatic insect occurrences for mapping freshwater biodiversity in macr...

Four species of Orthemis are now known to form nocturnal roosting aggregations in Costa Rica, Panama, and Ecuador. A survey of 2 764 observational records from Costa Rica and Panama in iNaturalist revealed 9 communal roosts among 388 records of Orthemis but no such roosts in 2 376 records of 26 other libellulid genera. Additional unpublished photos...

During the two decades (2001–2020) of the journal’s existence, 346 papers on Odonata were published in Zootaxa. These papers contributed 317 new extant taxa, 26 new fossil taxa, and 106 new larval descriptions. By the end of the period, papers in Zootaxa were contributing slightly more than half of all descriptions of new extant taxa. Research was...

During the two decades (2001-2020) of the journal's existence, 346 papers on Odonata were published in Zootaxa. These papers contributed 317 new extant taxa, 26 new fossil taxa, and 106 new larval descriptions. By the end of the period, papers in Zootaxa were contributing slightly more than half of all descriptions of new extant taxa. Research was...

The checklist includes all 471 species of North American Odonata (Canada and the continental United States) considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all...

The checklist includes all 470 species of North American Odonata (Canada and the continental United States) considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all...

Among the largest of all insects, dragonflies and damselflies are conspicuous. Active during the day, often brightly colored, and extremely photogenic―something about their appearance and dashing flight suggests a primeval world of tree ferns and dinosaurs. The first guide of its kind, this book includes an in-depth introduction with an overview o...

During surveys of the Odonata fauna of Tabasco in 2018 and 2019, the following four species were discovered to be first records from the state.

The checklist includes all 468 species of North American Odonata (Canada and the continental United States) considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all...

The Convention on Biological Diversity (CBD) commits its 196 nation parties to conserve biological diversity, use its components sustainably, and share fairly and equitably the benefits from the utilization of genetic resources. The last of these objectives was further codified in the Convention's Nagoya Protocol (NP), which came into effect in 201...

The checklist includes all 466 species of North American Odonata considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all species are given in the appended list of r...

A three-year field study (January 2011–December 2013) of the Odonata of Curaçao, supported by photos and exuvial collections, recorded a total of 21 species from the island, almost doubling its previously known fauna. The lists of Odonata known from Aruba and Bonaire were also updated by specimen and photo records, and 24 species are now known from...

An updated classification and numbers of described genera and species (until 2010) are provided up to family level. We argue for conserving the family-group names Chlorocyphidae, Euphaeidae and Dicteriadidae, as well as retaining Epiophlebiidae in the suborder Anisozygoptera. Pseudostigmatidae and New World Protoneuridae are sunk in Coenagrionidae...

1. Tracking insect migration at continental scales is intractable using exogenous markers because of tiny body size and high improbability of recapture. Naturally occurring endogenous isotopic markers, such as tissue δ2H and δ18O, are a means of assigning origins to both vertebrate and invertebrate populations, but the success depends upon derivati...

The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the widespread usage of the generic name Erythemis Hagen, 1861 for a group of common dragonflies from the New World over the simultaneously published nominal genus Lepthemis Hagen, 1861, selected to take precedence by the First Reviser action (Article 24.2),...

Teinobasis budeni sp. nov. is described from Pohnpei, Federated States of Micronesia. Holotype ♂: Micronesia, Pohnpei, Sokehs, Nanpil River headwaters, 01 July 2001; allotype ♀: same locality, 03 February 2001, both leg. D.W. Buden; to be deposited in FSCA, Gainesville, FL, USA. The new species belongs in the Fortis-group and differs from all speci...

Herein I respond to a critique of my paper on wing positions in Zygoptera. The author of that critique suggested that most of the hypotheses presented in that paper were flawed and questioned some of the facts brought to bear on them. In addition, he presented his own ideas in support of hypotheses I had rejected. I take this opportunity to clarify...

The checklist includes all 462 species of North American Odonata considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all species are given in the appended list of r...

The checklist includes all 461 species of North American Odonata considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all species are given in the appended list of r...

Leptobasis guanacaste is described from seasonal wetlands in dry forest in Guanacaste, Costa Rica. It is unique among the five species of the genus in thoracic color pattern and the structure of the male terminal appendages and female mesostigmal laminae and appears to be closest to L. candelaria through similarities in genital ligula, male metafem...

Leptobasis guanacaste is described from seasonal wetlands in dry forest in Guanacaste, Costa Rica. It is unique among the five species of the genus in thoracic color pattern and the structure of the male terminal appendages and female mesostigmal laminae and appears to be closest to L. candelaria through similarities in genital ligula, male metafem...

The status and trends of global biodiversity are often measured with a bias towards datasets limited to terrestrial vertebrates. The first global assessment of an insect order (Odonata) provides new context to the ongoing discussion of current biodiversity loss. A randomly selected sample of 1500 (26.4%) of the 5680 described dragonflies and damsel...

The checklist includes all 457 species of North American Odonata considered valid at this time. For each species the original citation, English name, type locality, etymology of both scientific and English names, and approximate distribution are given. Literature citations for original descriptions of all species are given in the appended list of r...

FIGURES 1 – 10. Leptobasis guanacaste. 1 – 4. S 10, male paratype. (1) lateral view; (2) mediodorsal view; (3) medioventral view; (4) posterior view. 5 – 6. Genital ligula, male paratype. (5) lateral view; (6) entolateral view. 7. Metafemur, male paratype, view of flexor surface. 8 – 9. Posterior lobe of pronotum and mesostigmal plates, dorsal view...

FIGURE 11. Wings, male paratype of Leptobasis guanacaste.

FIGURE 12. Male (above) and female (below) of Leptobasis guanacaste, at Hacienda Taboga, Guanacaste Province, Costa Rica (photos by DRP).

Larvae of almost all of the 5,680 species of the insect order Odonata (dragonflies and damsel- flies) are dependent on freshwater habitats. Both larvae and adults are predators. The order is relatively well studied, and the actual number of species may be close to 7,000. Many species have small distributional ranges, and are habitat specialists, in...

We compiled data on the occurrence and frequency of distinct female variants among Holarctic Odonata and interpreted the data in light of harassment-based hypotheses. The major source of male confusion for male mimicry hypotheses is predicted to be signal similarity between andromorphs and male distractors; for the learned mate recognition hypothes...

Dragonflies are quintessential forest animals, and forests are essential to them. The majority of odonate species are associated with forests, especially in the neotropical region. Forests are important in furnishing a variety of larval habitats and favorable conditions for adults. Adult odonates can use both sunshine and shade available in forests...

Subaeschna Martin, 1908, is synonymized with Gynacantha Rambur, 1842, and its only sp., S. francesca Martin, 1909, becomes Gynacantha francesca (Martin). G. bartai sp. n. is described from 5 specimens (holotype male and allotype female; Peru, Madre de Dios, Explorer's Inn; deposited in the NMNH, Washington, DC, USA) from southern Peru. It is charac...

Subaeschna Martin, 1908, is synonymized with Gynacantha Rambur, 1842, and its only sp., S. francesca Martin, 1909, becomes Gynacantha francesca (Martin). G. bartai sp. n. is described from 5 specimens (holotype ♂ and allotype ♀; Peru, Madre de Dios, Explorer's Inn; deposited in the NMNH, Washington, DC, USA) from southern Peru. It is characterized...

Zygoptera show two perching modes, one with wings closed and one with wings open. These perching modes are distributed unequally through the suborder; most Zygoptera perch with closed wings, but species in 43 genera of eight families at least occasionally – in most cases usually – perch with open wings. Alternative hypotheses to explain this dichot...

This report summarizes progress that has been made during the past five years toward the understanding of Neotropical Odonata. It also presents a list of critical species and sites, threats to Odonata conservation in the region, and priorities for further research. This region, the richest in the world for Odonata, must be a focus of intense resear...

This report summarizes progress that has been made during the past five years toward the understanding of Neotropical Odonata. It also presents a list of critical species and sites, threats to Odonata conservation in the region, and priorities for further research. This region, the richest in the world for Odonata, must be a focus of intense resear...

A recent collection of 69 specimens together with survey counts and incidental observations during June-July 2002 provide new information on the odonate fauna of Kosrae, Micronesia. The fauna comprises one zygopteran (Ischnura aurora) and six anisopterans. It appears to have remained stable with no known extinctions or colonizations over the past h...

A collection of 448 Odonata specimens made on Pohnpei, Caroline Islands, Micronesia, in 2001–2002 allows a reassessment of the fauna of this small, isolated island. There are 15 species, including six species of the zygopteran genus Teinobasis, which apparently speciated in situ, an unusually great diversity for such a small island. One of these sp...

Although the odon, fauna of the Mexican state of Nayarit has been considered well-known, a 7-day visit there in Sept. 2001 resulted in records of 21 spp. new for the state, bringing the state total to 120 spp., fifth highest in Mexico. Records from a 2-day visit in Aug. 1965 are also listed, many of them the first specific localities published for...

Dragonflies Through Binoculars A Field Guide to Dragonflies of North America. by Sidney W. Dunkle. Oxford University Press, New York, 2000. 274 pp. Paper, $29.95, £18.99. ISBN 0-19-511268-7. To aid those interested in dragonfly-watching, Dunkle offers color photographs and informative text on the field identification and biology of the 307 species...

A brief Odonata survey in southern Florida, USA, in January 2000 resulted in the discovery of two new species, Chrysobasis lucifer and Nehalennia minuta, for the USA and established populations of two other species, Tholymis citrina and Tramea calverti, that had been considered vagrants. Flight seasons of six additional species were extended. These...

Collections were made at 8 localities in southern Ghana during the summer of 1997. Three regions were sampled: coastal savanna, wooded savanna, and rainforest. 71 spp. were collected, 24 of which were new for the country, bringing the Ghana list to 123 spp. A list of spp. known from the country is included. Trithemis dejouxi Pinhey, 1978, is raised...

An updated list of the Odonata of Costa Rica is presented containing 268 species. Since the last published list for the country, 41 additional species have been reported. The country is the best studied in Central America. The most species-rich families are Libellulidae, Coenagrionidae, Gomphidae, and Aeshnidae, together comprising ∼75% of the tota...

This paper is dedicated to Philip S. Corbet on the occasion of his 70th birthday.

The sibling species Orthemis discolor and O. ferruginea are distinguished by coloration, although one structural characteristic can be used to differentiate many females. Further information on the distribution and relative abundance of the two species in North and Middle America is presented.

Seventeen species of Odonata were collected in 1994-1996 from 21 localities in the Kuril Islands. Mnais pruinosa, Aeshna nigroflava, Cordulia aenea, and Pseudothemis zonata are first records from the archipelago, and the last species represents a significant range extension from Honshu. Enallagma belyshevi is synonymized with E. circulatum, which i...

An andromorphic ♀ appeared to be ovipositing successfully in the midst of a high density of ♂ ♂ by both looking and acting like a ♂.

The avoidance-image hypothesis proposes that conspicuous, dark-phased raptors invade populations consisting exclusively of light-phased individuals because prey previously attacked by light individuals more strongly avoid light than dark individuals in subsequent attacks (Rohwer 1983). We extend this hypothesis to predict (1) that migratory species...

Two weeks in November 1983 were spent observing birds in the Mexican states of Quintana Roo, Yuctan, Campeche, Tabasco, and Chiapas. These observations included significant records of 49 species, 7 previously unrecorded from the Yucatan Peninsula, and discussion of additional species.

I. erratica, previously poorly known, has been found to be locally common between southwestern British Columbia and the San Francisco Bay region of California. It is an early-spring species, flying progressively later toward the north; extreme dates are 23 March and 8 August. Adults typically occur at beaver ponds but inhabit other fresh-water habi...

Experiments were perfomied in the field on males of five species and females of ten species of damselflies (Odonata: Zygoptera: Coenagrionidae) to determine the relative importance of visual and mechanical reproductive isolating mechanisms. Males of all five species did not distinguish visually their own female from heterospecific females of the sa...

Apostatic selection (frequency-dependent selection in which a rarer morph is at an advantage) has been thought to be responsible for polymorphism in certain invertebrates. The concept has been extended herein to include a causal relationship between apostatic selection and polymorphism in vertebrate predators. The diurnal birds of prey present seve...

The hypothesis that North Temperate Odonata can be categorized into "spring" or "summer" species by the predominant overwintering instars and the position and duration of the adult flight season was tested for 55 species in North Carolina. Over 3,000 larvae of these species, collected at a time of stable instar distribution (winter), were examined...

Although said to winter entirely in southern South America, Lesser Golden- Plovers (Pluvialis dominica dominica) have been recorded in eastern North America in small numbers throughout the winter. A literature search indicates that records are regular through December, most of them probably of late fall migrants, and again increase in late February...

Includes bibliographical references (leaves 588-603). Vita. Thesis (Ph. D.)--University of Miami, 1966. Photocopy.