REVISION OF THE NEARCTIC SPECIES OF LAUXANIA (DIPTERA: LAUXANIIDAE)

2000 ◽  
Vol 132 (4) ◽  
pp. 411-427 ◽  
Author(s):  
Joëlle R. Pérusse ◽  
Terry A. Wheeler
Keyword(s):  
Strong Evidence ◽  
North American ◽  
Male Genitalia ◽  
Distinct Species ◽  
North American Species ◽  
Related Genus ◽  
The North

AbstractThe North American species of Lauxania Latreille are revised. The genus contains five Nearctic species: L. albiseta Coquillett, L. glabrifronssp.nov., L. kafaristasp.nov., L. nigrimana Coquillett, and L. shewellisp.nov. All Nearctic species are illustrated and keyed. Consistent genitalic differences between Nearctic and Palaearctic specimens of the species usually identified as Lauxania cylindricornis (Fabricius) justify the recognition of the Nearctic specimens as a distinct species (L. shewelli). The male genitalia of Lauxania represent two types: the apparently plesiomorphic type has a simple rodlike phallapodeme, membranous phallus, and pointed unbranched postgonites; the apomorphic type has the phallapodeme expanded into a sclerotized hood surrounding the base of the phallus, a convoluted sclerotized phallus, and branched postgonites. These two genitalic types also occur in the related genus Calliopum Strand, which provides strong evidence that these genera, as currently recognized, may not be monophyletic relative to one another.

The North American Allies of Hylobius piceus (De Geer) (Coleoptera: Curculionidae)

1957 ◽  
Vol 89 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Stephen L. Wood
Keyword(s):  
North American ◽  
Distinct Species ◽  
Morphological Characters ◽  
North American Species ◽  
Winged Form ◽  
The North ◽  
The Status ◽  
Field Workers ◽  
Dimorphic Species ◽  
Biological Differences

While investigating the biology of the North American species of Hypomolyx, field workers in Manitoba found a vestigial, or short-winged, and a long-winged form under apparently identical conditions in about equal numbers. Although biological differences were nor then apparent, there was doubt as to whether they were dealing with one dimorphic species or with two distinct species, A search for morphological characters brought to light numerous differences between the two forms, supporting the view that two species were present. These differences, a description the previously unrecognized species, and notes concerning the status of the genera Hylobius and Hypomolyx are reported below.

scholarly journals FOUR OCHODÆUS NEW TO THE UNITED STATES

1906 ◽  
Vol 38 (8) ◽  
pp. 269-272 ◽  
Author(s):  
Chas. Schaeffer
Keyword(s):  
United States ◽  
North American ◽  
Distinct Species ◽  
The United States ◽  
North American Species ◽  
The North

Working over some neglected material, I found, to my surprise, that the specimens of Ochodœus colleted by me last year in Arizona are separable into three distinct species, none of which agree with the descriptions of the North American species. A few years ago my brother sent me from California, with some other material, two specimens of what I take to be an Ochadœus. Unfortunately, I misplaced one of the specimens, and not wishing to dissect the single remaining one, I leave this species in this genus for the present, till more material is available.

scholarly journals THE NORTH AMERICAN CALLIMORPHAS

1887 ◽  
Vol 19 (10) ◽  
pp. 181-191 ◽  
Author(s):  
H. H. Lyman
Keyword(s):  
North American ◽  
Distinct Species ◽  
North American Species ◽  
The North ◽  
Species Being

The North American species of the genus Callimorpha are exceedingly interesting both from their beauty and from the extreme variations to which some of the species are subject, and which has given rise not only tot he creation of numerous synonyms, but also to distinct species being regarded as merely varieties of other forms.

A REVIEW OF THE NORTH AMERICAN SPECIES OF GONIA sens. lat. (DIPTERA, TACHINIDAE)

1943 ◽  
Vol 75 (12) ◽  
pp. 219-236
Author(s):  
A. R. Brooks
Keyword(s):  
New Species ◽  
North American ◽  
Male Genitalia ◽  
North American Species ◽  
The North

The present sunmary of Gonia sens. lat. is made necessary because of a large number of undescribcd species recently segregated in the Canadian National Collection and by Dr. H. J. Reinhard. The group covered is the same as that summarized by Tothil (1924) and Morrison (1940), the latter work containing all records of species up until 1940 and with illustrations of the male genitalia of each species. It becomes only necessary then to present descriptions of new species and to fit all species into their proper restricted genera (in Townsend's sense): a key to all described North American species and illustrations of the new species are included.

A new catostomid fish (Ostariophysi, Cypriniformes) from the Eocene Kishenehn Formation and remarks on the North American species of †AmyzonCope, 1872

2016 ◽  
Vol 90 (2) ◽  
pp. 288-304 ◽  
Author(s):  
Juan Liu ◽  
Mark V.H. Wilson ◽  
Alison M. Murray
Keyword(s):  
New Species ◽  
North American ◽  
Phylogenetic Analyses ◽  
Distinct Species ◽  
Sister Group ◽  
North American Species ◽  
Pelvic Bone ◽  
The North ◽  
Basal Clade ◽  
Osteological Characters

AbstractFossil catostomids were very rare prior to the Eocene. After the Eocene, they suddenly decreased in diversity in Asia while becoming common fishes in the North American fauna. Knowledge of the taxonomy, diversity, and distribution of Eocene catostomids is critical to understanding the evolution of this fish group. We herein describe a new catostomid species of the genus †AmyzonCope, 1872 from the Eocene Kishenehn Formation in Montana, USA. The new species, †Amyzon kishenehnicum, differs from known species of †Amyzonin having hypurals 2 and 3 consistently fused to the compound centrum proximally, and differs from other Eocene catostomids in that the pelvic bone is intermediately forked. All our phylogenetic analyses suggest that the new species is the sister group of †A.aggregatumWilson, 1977 and that †Amyzonis the most basal clade of the Catostomidae. We reassessed the osteological characters of the North American species of †Amyzonfrom a large number of well-preserved specimens of the new species, as well as †A.gosiutenseGrande et al., 1982 and †A.aggregatum. Osteological characters newly discovered indicate that †A.gosiutenseis not a junior synonym of †A.aggregatum, but should be retained as a distinct species.

THE NORTH AMERICAN SPECIES OF GLISCHROCHILUS (COLEOP.)

1932 ◽  
Vol 64 (11) ◽  
pp. 255-262 ◽  
Author(s):  
W. J. Brown
Keyword(s):  
North American ◽  
Male Genitalia ◽  
North American Species ◽  
The North

The following stucly is based on the material in the Canadian National Collection supplemented by specimens from the collections of Messrs. Carl G. Siepmann, F. S. Carr, and G. Stace Smith. No new characters for the separation of closely allied species are offered in this paper. The most valuable characters known are those of the so-called flagellum of the male genitalia; the most useful for key purposes are presented by the elytral markings.

scholarly journals Molecular systematics of some North American species of Diplostomum (Digenea) based on rDNA-sequence data and comparisons with European congeners

2002 ◽  
Vol 80 (12) ◽  
pp. 2207-2217 ◽  
Author(s):  
Daniel E Galazzo ◽  
Selvadurai Dayanandan ◽  
David J Marcogliese ◽  
J Daniel McLaughlin
Keyword(s):  
North America ◽  
North American ◽  
Sequence Data ◽  
Intestinal Parasites ◽  
Distinct Species ◽  
North American Species ◽  
Similar Species ◽  
The North ◽  
Diplostomum Spathaceum ◽  
Rdna Sequence Data

The systematics of Diplostomum species, common intestinal parasites of piscivorous birds, has long been problematic, owing to phenotypic plasticity and the paucity of morphological features that are often subject to age- and host-induced variation. We sequenced the ITS1–5.8S–ITS2 regions of the rDNA from adult Diplostomum huronense, Diplostomum indistinctum, and Diplostomum baeri obtained from experimentally infected ring-bill gulls (Larus delawarensis) and compared them with partial ITS1 sequences from several species of Diplostomum in GenBank. The three North American species were distinguishable on the basis of ITS sequences. Sequences from D. huronense differed from those of D. indistinctum at 12 sites in ITS1 and 4 sites in ITS2, supporting morphological and morphometric data that indicate the two are distinct species. Sequences of D. huronense and D. indistinctum differed from those of D. baeri at 27 and 24 sites, respectively, in ITS1 and 15 and 12 sites, respectively, in ITS2. Phylogenetic analysis of partial ITS1 sequences revealed that the North American and European species of Diplostomum formed separate groups, with the former being basal to the latter. The results indicated that D. huronense and D. indistinctum from North America are distinct from Diplostomum spathaceum and other similar species from Europe. Furthermore, sequences from specimens identified as D. baeri from North America differed from those of D. baeri from Europe by 3.8% in ITS1 (23 sites). While morphologically similar, the two are not conspecific. Sequences of the North American species have been deposited in GenBank (AY 123042–123044).

Notes on the North American Species of Aphrodes (Homoptera: Cicadellidae)

1954 ◽  
Vol 86 (5) ◽  
pp. 199-200 ◽  
Author(s):  
Bryan P. Beirne
Keyword(s):  
North American ◽  
Individual Variation ◽  
Male Genitalia ◽  
North American Species ◽  
The North

Six North American species of leafhoppers of the genus Aphrodes were listed, with 36 synonyms, by Oman (1949). Examination of the male genitalia has revealed not more than four species. Because of the extensive individual variation it is often difficult to identify some of the species on external characters alone. The male genitalia, however, show good specific characters (Figs. 1-5).

CHROMOSOME MORPHOLOGY OF THE NORTH AMERICAN SPECIES OF ACTAEA (RANUNCULACEAE). I

1966 ◽  
Vol 44 (10) ◽  
pp. 1231-1234 ◽  
Author(s):  
Shoichi Kawano ◽  
James M. Kane ◽  
Hugh H. Iltis
Keyword(s):  
North American ◽  
Secondary Constriction ◽  
Distinct Species ◽  
Chromosome Morphology ◽  
North American Species ◽  
The North

Karyotypes of three eastern North American taxa of Actaea were investigated. Their karyotypes are as follows:[Formula: see text][Formula: see text][Formula: see text]Actaea rubra and its albino f. neglecta have identical karyotypes. The karyotypes of A. rubra f. rubra and A. pachypoda, two very distinct species, though similar, are clearly differentiated by the presence of a secondary constriction at the distal end of the long arm in the shorter of the two pairs of J-shaped chromosomes of A. pachypoda. The karyology of the three North American taxa is somewhat different from that reported by Kurita for A. asiatica.

A New Species of Balclutha, with Notes on the Canadian Balcluthini (Homoptera: Cicadellidae)

1950 ◽  
Vol 82 (6) ◽  
pp. 123-126 ◽  
Author(s):  
Bryan P. Beirne
Keyword(s):  
New Species ◽  
North American ◽  
Individual Variation ◽  
Male Genitalia ◽  
North American Species ◽  
Great Similarity ◽  
External Appearance ◽  
The North ◽  
A New Species

Species of Balcluthini show great similarity in external appearance and many exhibit much individual variation. Examination of the male genitalia is the only certain means of identification. Baker (1896, Can. Ent. 28: 35-42) attempted to separate the species on external characters, and Davidson and DeLong (1935, Proc. Ent. Soc. Wash. 37: 97-112) revised the North American species and figured the male genitalia. Little has been published on the species occurring in Canada. Five species from Canada are represented in the Canadian National Collection. One of them is previously undescribed.

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