Semi-aquatic Hemiptera Research Articles

Rhagoveliaspecies from Nosy Boraha east of Madagascar (Hemiptera: Heteroptera: Veliidae)

In the years 1992 and 1993, the Austrian entomologist Michael Madl collected semiaquatic Hemiptera on Nosy Boraha (Île Sainte Marie), a small island near the north-eastern coast of Madagascar. The collected material contains five species of Rhagovelia Mayr, 1865, two of which are new to science. Both Rhagovelia madlisp. nov. and Rhagovelia kalalaoensis sp. nov. belong to the R. tesarispecies group. The other three species reported from the island are R. madariHoberlandt, 1941, R. reuteriHoberlandt, 1951, and R. tesariHoberlandt, 1941.

New Records of Aquatic and Semi-Aquatic Heteroptera (Insecta: Hemiptera) from Mainland India

Four species of the aquatic and semi-aquatic Hemiptera such as Anisops occipitalis Breddin (1905), Hydrometra okinawana Drake (1951), Neoalardus typicus (Distant, 1903) and Limnometra ciliata Mayr (1865), of families Notonectidae, Hydrometridae, Veliidae and Gerridae respectively, are the first records from mainland India and were collected from different districts of Meghalaya. The recorded species are very rare and have been collected from a single locality.

Aquatic and semi aquatic Hemiptera community of Sonebeel, the largest wetland of Assam, northeastern India

Aquatic and semiaquatic Hemiptera bugs play significant ecological roles, and they are important indicators and pest control agents. Little information is currently available concerning its populations in southern Assam. This study assessed hemipterans in four sites of Sonebeel, the largest wetland in Assam (3458.12 ha at full storage level), situated in Karimganj District. The major inflow and outflow of the wetland are the rivers Singla and Kachua, respectively (the Kachua drains into the Kushiyara River). Samples were trapped with pond nets and were seasonally recorded. This study recorded a total of 28 species of aquatic and semiaquatic hemipterans belonging to 20 genera under nine families. Population, geographical and environmental data (e.g., rainfall) were used to assess the relative abundance of species, species richness and different diversity indices, and species distribution.

Morphological and molecular characterization of predatory aquatic and semi-aquatic bugs of India

In the present study, a total of eight species of aquatic and semi-aquatic Hemiptera collected from India were identified based on morphology and mitochondrial cytochrome oxidase gene I (COI). Details of morphology based identification and the utility of COI gene to identify the aquatic Hemiptera is discussed in this paper.

The aquatic and semiaquatic Hemiptera of Jamaica

The aquatic and semiaquatic Hemiptera of Jamaica were surveyed between April 2004 and February 2005 by sampling 60 freshwater and saline aquatic habitats throughout the island. A total of 39 species was found, confirming the presence of 31 previously known hemipteran species in the island, and adding eight additional species. This gives an overall total of 49 species occurring in Jamaica, including those that have been previously recorded but not found during this study.

A Checklist of Aquatic and Semiaquatic Hemiptera (Insecta) of Madhya Pradesh

A Checklist of Aquatic and Semiaquatic Hemiptera (Insecta) of Madhya Pradesh

A Checklist of Aquatic and Semi-Aquatic Hemiptera (Insecta) of Karnataka

A Checklist of Aquatic and Semi-Aquatic Hemiptera (Insecta) of Karnataka

A Checklist of Aquatic and Semi Aquatic Hemiptera (Insecta) of Rajasthan, India

A Checklist of Aquatic and Semi Aquatic Hemiptera (Insecta) of Rajasthan, India

A checklist of aquatic and semi-aquatic Hemiptera (Insecta) of Tamil Nadu

A checklist of aquatic and semi-aquatic Hemiptera (Insecta) of Tamil Nadu

A checklist of aquatic and semi-aquatic Hemiptera (Insecta) of Tamil Nadu

A checklist of aquatic and semi-aquatic Hemiptera (Insecta) of Tamil Nadu

AQUATIC AND SEMIAQUATIC HEMIPTERA OF PEATLANDS AND MARSHES IN CANADA

AbstractThirteen families containing 138 species of aquatic and semiaquatic Hemiptera have so far been recorded from Canada. The identification of these presents few real difficulties and so the general occurrence of the taxa across the country is fairly well known. Although there has been no intensive study of the Hemipterous insects in peatlands and marshes, the 61 species so far reported from marshes, 32 from fens, and the 33 from bogs appear to be facultative rather than obligatory inhabitants of these habitats. All have been found in other habitats and probably most lentic species occur in marsh habitats. All aquatic and semiaquatic bugs are predators, and most overwinter as adults. Environmental–physiological study of species occurring in bogs has just begun, but evidence suggests that many species have the ability to regulate their internal milieu in water with pH below 4.6–4.7. However, further experiments are needed to determine the physiological limits of tolerance of these insects, the details of osmotic and ionic regulation, and acid–base balance in low-pH water. More collecting is needed in bogs, fens, and marshes, and the life cycle and biology of the Hemiptera occurring in peat-lands still require intensive study.

Laboulbeniales on semiaquatic Hemiptera. V. Triceromyces

Six species of Triceromyces (Laboulbeniales), including the type, T. balazucii (on Hebridae), parasitic on semiaquatic Hemiptera, were studied at the light-microscopic level. Descriptions are provided for all of the taxa, and features of developmental morphology are described, compared, and illustrated with photographs and line drawings. Four species are described as new: T. hebri (on Hebridae), T. hydrometrae (on Hydrometridae), and T. biformis and T. bullatus (on Mesoveliidae). The species growing on Hebridae and Hydrometridae are monoecious. The two species on Mesoveliidae develop monoecious and dioecious morphs, which occur together on the same host individual. This phenomenon is recognized and described for the first time in the Laboulbeniales. Two species, Autophagomyces poissonii and Dioicomyces mesoveliae, previously described from a species of Mesoveliidae, are shown to represent the monoecious and dioecious forms of a species of Triceromyces and are transferred to this genus as T. poissonii. Speculations on the origin of dioecism in the Laboulbeniales are reviewed and discussed briefly without, in the absence of experimental evidence, reaching positive conclusions.

Ecology and zoogeography of aquatic Hemiptera from temporary pools in Central Africa

35 species of aquatic and semi-aquatic Hemiptera taken in ephemeral pools and pans at 21 collecting sites in 2 regions of Southern Rhodesia are recorded. Ecological conclusions on the habitat “preferences” of some of these species are described and comparisons are made with collections from equivalent habitats in South Africa, East Africa, Abyssinia and Arabia. Differences in alkalinity, pH and acidity have no detectable effect on the occurrence of species, but the physical conditions of the habitat appear to be critical (e.g. size, depth of pool, temperature, etc.). The majority of the aquatic Hemiptera from these temporary pools and pans are widespread Ethiopian species, e.g. Anisops pellucens, A. varia, A. debilis (Some occur also in Arabia), or are Ethiopian-Oriental species, e.g. Anisops sardea, Laccotrephes brachialis, Mesovelia vittigera and the remainder of the fauna consists of a few endemic (regionally abundant) species. Such endemics are for instance Anisops convexonota in Arabia, A. worthingtoni in Kenya, A. hancocki and A. jaczewski in East and Central Africa, A. aglaia in the Transvaal and Cape Province. It is suggested that the widespread Ethiopian species may show more complete adaptation and versatility to life in pans than regionally occurring species, and that the zoogeographic spread of Ethiopian species may be restricted in part by climatic change (e.g. temprature) and in part by the restriction of “pans” themselves to certain climatic regions. It would be extremely difficult to differentiate between such effects. These results are discussed in relation to recent zoogeographic studies in Africa.

Check List of Aquatic and Semiaquatic Hemiptera (Insecta) of Oklahoma

No new names or taxa are included in the check list of 75 species. The 75 taxa of aquatic and semiaquatic Hemiptera known to occur in Oklahoma are listed below. The list is based in part on previous reports (cited) and in part on the collections in the Oklahoma State University Entomology Museum and the Oklahoma University Stovall Museum, mostly collected by the authors beginning in 1960. If the record is one not previously published, the determiner of the specimen is indicated by initials parenthetically (BH means B. Harrison, HH means H. Harris, RS means R. Sailer, KFS and WAD refer to the authors). Six species marked by asterisks below reported in the state for the first time, in McCurtin Co., southeastern Oklahoma, were previously known only from the southeastern coastal states (Hungerford, Univ. Kans. Sci. Bull. 345: 5-195. 1933, and 32: 1-288, 408-827. 1948; Drake and Chapman, Proc. Biol. Soc. Wash. 66: 53-60. 1953); since the known biota of that county has affinities with the Southeast, these new records are not surprising.

Contributions to a Synopsis of the Hemiptera of Missouri, Part V. Hydrometridae, Gerridae, Veliidae, Saldidae, Ochteridae, Gelastocoridae, Naucoridae, Belostomatidae Nepidae, Notonectidae, Pleidae, Corixidae

This completes the author's series (except for a proposed supplement) on the Hemiptera of Missouri. Included in these aquatic and subaquatic families are ninety-four species in twenty-eight genera; sixty-five of the species are reported for the state and the other twentynine are indicated to be of probable occurrence. Annotations and keys to species as well as representative habitus sketches and illustrations of certain structural details are given. With no prospects of further intensive collecting for my studies of the insects of Missouri it seems best to terminate this series on the Hemiptera of that state. This is the fifth and final part of the original series and includes the aquatic and most of the so-called semi-aquatic Hemiptera. This part will be followed shortly by a supplement to assemble the additional data and corrections which have come to hand since publication of the previous four parts. Two changes must be made in the key to families in Part I, as the family Naucoridae was accidentally omitted. The Naucoridae would run to couplet 30 but would differ from both Nepidae and Belostomatidae in having the base of the beak covered anteriorly by a large, flat, flap-like labrum which is not so formed in those two families. The genus Plea would run to the family Notonectidae, but it is now considered as a distinct family, the Pleidae. Its members differ from those of Notonectidae in having all legs of equal length and being less than three millimeters long. Among the families of the present study, the Hydrometridae, Gerridae and Veliidae have the habit of moving across the surface of the bodies of water on which they live. As a further peculiarity some members of these families exhibit polymorphism of wing length to a marked degree: the wings may be fully developed in reaching to or beyond the apex of the abdomen or they may show various degrees of reduction to the point of complete absence. Such modifications are accompanied by changes in the shape of the pronotum; where possible 1 Previous parts were published in this journal, as follows: Part I, 26:122146 (1941); Part II, 27:591-609 (1942); Part III, 31:638-683 (1944); Part IV, 42:123-188 (1949). 2 U. S. Dept. Agriculture, A. R. S., Washington 25, D. C., formerly Dept. Zoology and Entomology, Montana State College, Bozeman, Mont. Contribution from Montana State College Agricultural Experiment Station, M. S. 38, paper No. 527 Journal Series.

Notes on the Identity, Habitat and Distribution of Some Semi-Aquatic Hemiptera of Florida

This paper presents notes on my collections in these families from 1951 through 1954 and gives keys to genera and species. A few species that occur in Florida, but which I have not collected, are included. Most of my collections were made in the vicinity of Orlando and between Orlando and the East Coast. No attempt was made to collect all species from different counties or localities. Unless studies were being conducted in certain groups, only a small series of specimens was taken, and the number of specimens collected does not necessarily reflect the abundance of the species.

The Aquatic and Semiaquatic Hemiptera of Northern Florida. Part 4: Classification of Habitats and Keys to the Species

Many of the small streams in northern Florida may be classified in the sand-bottomed category. The water is swift and usually quite dark due to seepage and drainage from flatwoods and swamps. There is practically no vegetation associated with the stream proper. Twenty-four species of aquatic and semi-aquatic Hemiptera have been taken in this type of stream. The most typical are the gerrids and the rhagovelias. Gerris nebularis as well as one species of Rhagovelia are found only in swift-flowing sandbottomed streams and those of a calcareous nature. Microvelia alachuana is cQnfined to the sand-bottomed streams. Most of the aquatics have been taken only in areas where an accumulation of hyacinths have formed or in the small pools where the water is rather still and leaf debris has collected. Species present in sand-bottomed streams are:

The Aquatic and Semiaquatic Hemiptera of Northern Florida. Part 3: Nepidae, Belostomatidae, Notonectidae, Pleidae and Corixidae

This paper completes the annotated lists of the families of aquatic and semi-aquatic Hemiptera of northern Florida; two families, Hydrometridae and Naucoridae, have been omitted. I published taxonomic and distributional notes on the family Hydrometridae in 1948 and no new data have been gathered. The family Naucoridae has been omitted as I am now undertaking a taxonomic revision of the genus Pelocoris. Part 4 of this series will include keys to the species and a classification of the northern Florida habitats.

The Aquatic and Semiaquatic Hemiptera of Northern Florida. Part 1: Gerridae

The Aquatic and Semiaquatic Hemiptera of Northern Florida. Part 1: Gerridae

The biology and ecology of aquatic and semiaquatic Hemiptera

The biology and ecology of aquatic and semiaquatic Hemiptera