Conostoma williamsonii n. sp., a lagenostomalean ovule from the Pennsylvanian of the Illinois Basin

1984 ◽  
Vol 62 (1) ◽  
pp. 96-101 ◽  
Author(s):  
Sara P. Stubblefield ◽  
Gar W. Rothwell ◽  
Thomas N. Taylor
Keyword(s):  
North American ◽  
Distinct Species ◽  
Outer Margin ◽  
Illinois Basin ◽  
Vascular Bundles ◽  
Histological Features

Ellipsoid lagenostomalean ovules previously regarded as Conostoma oblongum are recognized as a distinct species based on shape, number of vascular bundles, and histological features of the integument. Conostoma williamsonii n. sp. is shorter and broader than C. oblongum and possesses a larger number (eight or nine) of vascular bundles. Features of the integument are similar to those of C. oblongum and C. chappellicum and include a smooth outer margin and a two-zoned sclerotesta. Conostoma williamsonii increases our understanding of the diversity of lagenostomalean ovules during the Middle Pennsylvanian and calls to question the occurrence of C. oblongum in currently known North American coal-ball floras.

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 NORTH AMERICAN TORTRICIDÆ

1905 ◽  
Vol 37 (12) ◽  
pp. 399-400
Author(s):  
C. H. Fernald
Keyword(s):  
North American ◽  
Outer Margin ◽  
Ground Colour ◽  
Basal Segment ◽  
Dorsal Portion ◽  
Outer Half

Eucosma Pergandeana, n. sp.— Expanse of wings, 16–20 mm. Head, palpi except a touch of fuscous on the outside, basal segment of the antennæ, whitel flagellum of antennæ fuscous, annulate with white. Thorax varying from white to pale straw colour.Ground colour of fore wings white or pale cream colour; the outer half of the costa with about eight oblique fuscous lines, which are lost in the fuscous dorsal portion of the wing. The remaining portion of the wing is streaked longitudinally with fuscous, but so diffuse as to render the lines very indistinct, and the surface behind and beyond the cell is nearly unifromly pale grayish fuscous in some specimens; the ocelloid patch near the anal angle is represented by fragments of three fine blackish lines, more or less obliterated and broken by a short vertical bar of more of les distinct metallic pale gray scales; a similar one beyond follows the outer margin and joins the first below, but is broken near the middle of its course.

A TAXONOMIC REVISION OF THE GENUS PSEUDOPHYSALOPTERA BAYLIS, 1934 (NEMATODA: PHYSALOPTERIDAE)

1963 ◽  
Vol 41 (6) ◽  
pp. 1069-1077 ◽  
Author(s):  
G. A. Schad
Keyword(s):  
North American ◽  
Related Species ◽  
Taxonomic Revision ◽  
Distinct Species ◽  
Closely Related Species ◽  
Tentative Identification

The genus Pseudophysaloptera, recognized as a genus distinct from Physatoptera, is tentatively considered monotypic. The several species previously assigned to the genus Pseudophysaloptera, and the closely related species Physaloptera kotlani, have been reduced to one polytypic species, Pseudophysaloptera formosana, with two subspecies, P. f. formosana and P. f. soricina. The former occurs in Oriental species of Suncus, while the latter occurs in Palaearctic and Ethiopian soricid insectivores. North American specimens, which may represent a distinct species, are tentatively assigned to P. f. soricina. Presently available collections are only sufficient for a tentative identification of the Nearctic form.

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.

Distinction of Cladonia rei and C. subulata based on molecular, chemical and morphological characteristics

2010 ◽  
Vol 42 (4) ◽  
pp. 373-386 ◽  
Author(s):  
Christian DOLNIK ◽  
Andreas BECK ◽  
Daria ZARABSKA
Keyword(s):  
North American ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Molecular Data ◽  
Molecular Methods ◽  
Chemical Feature ◽  
Dry Grasslands ◽  
American Sample ◽  
North American Sample

AbstractCladonia rei and Cladonia subulata are morphologically similar, but chemically different cup lichens of dry grasslands and nutrient-poor ruderal habitats. Recently, C. rei has been synonymized with C. subulata on the basis of combined morphological and chemical investigations. However, doubts remained due to a molecular divergent North American sample of C. rei compared to European C. subulata. To clarify the situation, using molecular methods, we analysed chemically different European samples of C. rei and C. subulata, as well as other morphologically or chemically similar Cladonia species. Molecular data show that European and North American samples of C. rei belong to the same clade, which is closely related to C. fimbriata and followed by a subclade with C. coniocraea and C. ochrochlora. The subclade of C. subulata appears to be distinct from C. rei. In concordance with molecular data, the presence of homosekikaic acid is the determining chemical feature for C. rei. In addition, C. humilis and C. innominata proved to be molecularly distinct species.

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.

Taxonomic studies on the genus Atrichum in North America

1969 ◽  
Vol 47 (3) ◽  
pp. 353-368 ◽  
Author(s):  
Robert R. Ireland
Keyword(s):  
United States ◽  
North America ◽  
North American ◽  
Distinct Species ◽  
The United States ◽  
Morphological Characters ◽  
Taxonomic Study ◽  
Chromosome Counts ◽  
The Status ◽  
Taxonomic Studies

A taxonomic study was made of several North American taxa in the genus Atrichum. The primary emphasis was on the Canadian taxa and a key to the six species (A. altecristatum, A. angustatum, A. crispum, A. oerstedianum, A. selwynii, A. undulatum) and one variety (A. undulatum var. gracilisetum) of the country is presented. Atrichum oerstedianum, which has been confused with A. undulatum, is added to the moss flora of the United States and Canada. The distribution of A. crispum is clarified and a detailed study of the species revealed new morphological characters that are useful to distinguish it. A variety of A. undulatum, the var. altecristatum, is raised to the rank of a species and morphological and distributional data are given to support the status of A. selwynii as a distinct species. The first chromosome counts are reported for A. selwynii (n = 7) and A. altecristatum (n = 14). Detailed descriptions are provided for A. altecristatum, A. crispum, A. oerstedianum, and A. selwynii.

A New Species of Alniphagus (Col. Scolytidae) from Canada

1949 ◽  
Vol 81 (9) ◽  
pp. 235-235 ◽  
Author(s):  
Karl E. Schedl
Keyword(s):  
British Columbia ◽  
New Species ◽  
North American ◽  
Bark Beetles ◽  
Far East ◽  
Distinct Species ◽  
Common Species ◽  
The Far East ◽  
The Common ◽  
A New Species

Checking some North American genera of bark-beetles I found a series of Alniphagus Sw. which does not agree with the common species Alniphagus aspericollis from California and British Columbia and doubtless represents a new species. The genus therefore comprises now three distinct species, Alniphagus alni Nijs. from Japan and the Far East, A. aspericollis from British Columbia down to California and the new species A. hirsutus from Alnus sitchensis in B.C.

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.

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