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.

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.

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.

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 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.

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).

The phlogosaria Complex of the Genus Plagodis (Lepidoptera: Geometridae)

1959 ◽  
Vol 91 (4) ◽  
pp. 193-208 ◽  
Author(s):  
E. G. Munroe
Keyword(s):  
North American ◽  
Distinct Species ◽  
North American Species ◽  
Summer Generation ◽  
The North ◽  
Spring Generation

Rupert's excellent revision (1949) has greatly clarified the classification of the North American species of P1agodis. One of the most interesting features of Rupert's work was his demonstration by rearing that what had previously been considered a distinct species, P1agodis keutzingaria Packard, was in fact the spring generation of the aestival P. phlogosmia Guenée. By analogy it followed that P. schuylkillensis Grossbeck must be considered the summer generation of P. purpuraria Pearsall and P. arrogaria Hulst that of P. fervidaria Herrich-Schaeffer. Rupert was thus able to group in three species elements that had previously been distributed among six.

New species of Xanthia (Lepidoptera: Noctuidae) from North America

2003 ◽  
Vol 135 (4) ◽  
pp. 549-554 ◽  
Author(s):  
J. Donald Lafontaine ◽  
Kauri Mikkola
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Distinct Species ◽  
North American Species ◽  
The North ◽  
Previously Treated ◽  
Lepidoptera Noctuidae

AbstractThe North American species previously treated as Xanthia togata (Esper) is shown to be a distinct species and described as new. Illustrations of adults and genitalia of X. togata and Xanthia tatago are provided.

The North American Species in Group VII of Ips De Geer (Coleoptera: Scolytidae)

1965 ◽  
Vol 97 (2) ◽  
pp. 193-198 ◽  
Author(s):  
G. R. Hopping
Keyword(s):  
United States ◽  
New Species ◽  
North American ◽  
North American Species ◽  
The North ◽  
Northern United States

AbstractGroup VII of North American Ips contains I. thomasi, new species, I. borealis Swaine and I. swainei R. Hopping. They are less than 4.0 mm. long and females have the front of the head or at least the vertex smooth and shining, impunctate, or with very fine sparse punctures; males are more coarsely granulate-punctate on the frons. The species are described and a key is given. All breed in Picea in Canada and northern United States.

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