Showing papers on "Genus published in 1970"
Journal Article•
TL;DR: This generic level taxonomic review of the nematode superfamily Aphelenchoidea is based upon a study of specimens from 24 of the 28 described genera and four plates, containing 106 original drawings of the males, females, stylets, and spicules of representatives of 22 aphelenchoid genera are presented.
Abstract: This generic level taxonomic review of the nematode superfamily Aphelenchoidea is based upon a study of specimens from 24 of the 28 described genera. The diagnoses of these genera are presented, and some are emended with new information. One new genus, Huntaphelenchoides, and five new combinations are proposed. The families Paraphelenchidae and Anomyctidae are placed in synonymy with Aphelenchidae and Aphelenchoididae, respectively. The genera Asteroaphelenchoides and Pseudaphelencboides are placed in synonymy under the genus Aphelenchoides. Rare male and/or female specimens of Peraphelenchus, Anomyctus, Laimaphelenchus, Aphelenchus, Cryptaphelenchoides, Megadorus, Tylaphelenchus, and Entaphelenchus, are redescribed and illustrated. Four plates, containing 106 original drawings of the males, females, stylets, and spicules of representatives of 22 aphelenchoid genera, are presented. Key Words: Taxonomic review, Aphelenchoidea.
114 citations
Journal Article•
TL;DR: The hyphomycetous genus Phialophora is revised and there remain now twelve species or species groups which are redescribed, and the necessary new combinations are proposed.
Abstract: The hyphomycetous genus Phialophora is revised. It is characterized by flask-shaped phialides with a collarette and one-celled slimy conidia. This characterization excludes species which form blastospores on sympodulae besides phialospores, and which have been revised as species of the genus Rhinocladiella in a previous paper.
The genus Margarinomyces, on the contrary, is considered to be a synonym of Phialophora. With this emendation there remain now twelve species or species groups which are redescribed. The necessary new combinations are proposed.
93 citations
90 citations
TL;DR: The karyotype of the deppet species group appears to be the most primitive among the extant species groups of the genus Cnemidophorus, and the karyotypes of the other species groups are readily derived from it primarily by means of Robertsonian centric fusioins and unequal pericentric inversions.
Abstract: Lowe, C. H. (Dept. Biol. Sci., Univ. Arizona, Tucson), Wright, J. W., Cole, C. J., and Bezy, R. L. 1970. Chromosomes and evolution of the species groups of Cnemidophorus (Reptilia: Teiidae). Syst. Zool., 19:128-141.-On the basis of chromosome data, the large and complex genus Cnemidophorus of the New World lizard family Teiidae is divided into five species groups (the deppei, lemniscatus, sexlineatus, tigris, and tesselatus groups). These species groups are, in the main, congruent with those customarily recognized on the basis of external morphology. The hyperythrus species group, however, is placed in the deppei group: (1) all species examined from these two groups have identical karyotypes which differ from those of all other species examined in the genus, and (2) the two groups were formerly distinguished primarily on the basis of a single variable morphological character. The tesselatus group contains two species (tesselatus and neomexicanus), each parthenogenetic and derived through intergroup hybridization. Both of these parthenospecies originated through hybridization between the same two species groups, but different parental species combinations were involved in the production of each of them. The karyotype of the deppet species group appears to be the most primitive among the extant species groups of the genus Cnemidophorus, and the karyotypes of the other species groups are readily derived from it primarily by means of Robertsonian centric fusioins and unequal pericentric inversions. The phylogeny of the genus based on the observed pattern of karyotypic evolution is consistant with the overall ecologic and biogeographic distributions of the species [Karyology; phylogeny; Cnemidophorus]. Based primarily on external morphological characters, five species groups (deppei, hyperythrus, lemniscatus, sexlineatus, and tesselatus) are customarily recognized in the large and complex genus Cnemidophorus of the New World lizard family Teiidae (Burt, 1931; Duellman and Wellman, 1960; Duellman and Zweifel, 1962). Overemphasis of a few external morphlogical characters has led to a certain amount of ambiguity and confusion in the delineation of species groups in the genus (Duellman and Zweifel, 1962:168; Walker, Taylor, and Maslin, 1966b). In problems concerning speciation and evolutionary pathways that have led to natural group assemblages above the species level, it is obviously appropriate to consider data on karyotypes and modes of reproduction. Accordingly, we consider here some of this newer information in conjunction with the more conventional data for species groups in the genus Cnemidophorus and discuss evolutionary relationships suggested by all of these data. ACKNOWLEDGMENTS Numerous graduate students at The University of Arizona have contributed live Cnemidophorus for our karyotypic investigations. In particular, we are grateful for the extraordinary field efforts of the following: Robert J. Baker (now at Texas Technological College, Lubbock), Eldon J. Braun, Stephen R. Goldberg, E. Annette Halpem, David S. Hinds, Richard D. Krizman, James L. Patton (now at The University of California, Berkeley), Michael D. Robinson, and Oscar H. Soule (now at The Missouri Botanical Garden, St. Louis). Kenneth K. Asplund (The University of California, Los Angeles), Joseph R. Lannom (The University of Utah, Salt Lake City), and Philip J. Regal (The University of California, Los Angeles) also contributed lizards that were particularly useful for
88 citations
TL;DR: The diagnosis of its senior synonym Spiniferites is expanded in order to incorporate additional information gained since 1850 and all species according with the expanded diagnosis are listed.
Abstract: Following the recent official rejection of proposals for conservation of the generic name Hystrichosphaera, the diagnosis of its senior synonym Spiniferites is expanded in order to incorporate additional information gained since 1850 and all species according with the expanded diagnosis are listed (24 species are transferred to Spiniferites). The cyst-family name “Hystrichosphaeraceae” is replaced by the new name “Spiniferitaceae”.
86 citations
82 citations
TL;DR: The family Candonidae is represented in Canada by 33 species belonging to three genera Candona, Paracandona, and Candocyprinotus, of which two, Candona facetus and Candona subacuminata, are new.
Abstract: The family Candonidae is represented in Canada by 33 species belonging to three genera Candona, Paracandona, and Candocyprinotus. The genus Candona is represented by 31 species of which two, Candona facetus and Candona subacuminata, are new. A new genus, intermediate between Candona and Cyprinotus, has been found in Canada, namely Candocyprinotus ovatus.
79 citations
01 Jan 1970
77 citations
TL;DR: The family Ilyocyprididae is represented in Canada by five species belonging to the two genera IlyocyPRis and Pelocypris, the latter of which is represented by a new species Pelocy Pris alatabulbosa.
Abstract: The family Ilyocyprididae is represented in Canada by five species belonging to the two genera Ilyocypris and Pelocypris, the latter of which is represented by a new species Pelocypris alatabulbosa; the Notodromadidae are represented by the two genera Notodromas and Cyprois; the Darwinulidae and Cytherideidae are represented by one genus each, Darwinula and Cytherissa; the Entocytheridae are represented by Thermastrocythere.
70 citations
TL;DR: It has now been learnt that the generic name Sapromyces is illegitimate, as it is the name of a genus of fungi, and it is proposed that the genus be named Acholeplasma in the family Acholesplasmataceae.
Abstract: SUMMARY: In an earlier paper it was proposed that a second family be re-established within the Mycoplasmatales for those strains not requiring sterol, and the nomenclature of Sabin, who first made this proposal, was followed in the belief that although unsuitable it was valid. It has now been learnt that the generic name Sapromyces is illegitimate, as it is the name of a genus of fungi. It is therefore proposed that the genus be named Acholeplasma in the family Acholeplasmataceae.
TL;DR: Thirty-five species of Brazilian Tetranychidae are discussed, of which 7 are new, and the genus Acostanychus Livschitz is synonymized under Atrichoproctus Flechtmann (NEW SYNONYMY).
Abstract: Thirty-five species of Brazilian Tetranychidae are discussed, of which 7 are new: Oligonychus steinhaueri , Schizotetranychus rhynosperus , Eotetranychus nigrens , Platytetranychus spatulatus , P. elongatus , Mononychus mcgregori , and Tetranychus armipenis . The genus Acostanychus Livschitz is synonymized under Atrichoproctus Flechtmann (NEW SYNONYMY).
TL;DR: Six other species of Excirolana examined in the course of this investigation show evidence of internal incubation, and ovoviviparity appears to be characteristic of the entire genus, members of which live on exposed sand beaches throughout tropical and warm temperate regions of the world.
Abstract: Studies on the intertidal sand-beach isopod, Excirolana chiltoni, have shown the species to be ovoviviparous. Large yolk-filled eggs are deposited into paired uteri of the female where they remain throughout gestation. Intrauterine development progresses through five stages and terminates upon birth of the manca which is morphologically similar to the adult but lacks the eighth pair of thoracic legs. The oostegites while present are much reduced and form a genital operculum rather than a brood pouch as they do in the majority of free living isopods. Six other species of Excirolana examined in the course of this investigation show evidence of internal incubation. Ovoviviparity thus appears to be characteristic of the entire genus, members of which live on exposed sand beaches throughout tropical and warm temperate regions of the world. Internal retention of embryonic stages provides protection against a number of environmental stresses peculiar to this sort of habitat.
01 Jan 1970
TL;DR: A revision of the Surinam species and subspecies of the Corydoras genus was thought necessary, based on 5211 specimens belonging to seventeen species andSubspecies of which seven are new to science.
Abstract: During recent expeditions to Surinam, large ichthyological collections have been made from nearly all river systems by several ichthyologists, one of which was the author. Because of new information provided by the especially rich collections of Corydoras, a revision of the Surinam species and subspecies of this genus was thought necessary. This revision is based on 5211 specimens belonging to seventeen species and subspecies of which seven are new to science, viz., C. bondi coppenamensis, C. guianensis, C. heteromorphus, C. octocirrus, C. oelemariensis, C. schwartzi surinamensis and C. saramaccensis. A key to the Surinam species is provided and the taxonomic value of several characters is discussed. The distribution of the different groups within the genus Corydoras is discussed and remarks on ecology and ethology of Surinam species are given.
Book•
01 Jan 1970
01 Jan 1970
TL;DR: A new marine interstitial macrodasyoid gastrotrich Planadasys marginalis is described from the intertidal sands on Waltair coast, India and fails to fit into any known genera of the order Macrodasyoidea, so it is assigned to a new genus, Planodasys.
Abstract: A new marine interstitial macrodasyoid gastrotrich Planadasys marginalis is described from the intertidal sands on Waltair coast, India (Bay of Bengal). In the disposition of the adhesory tubules, shape of the tail lobes and the structure of the reproductive system, the new species fails to fit into any known genera of the order Macrodasyoidea, for which reason it is assigned to a new genus, Planodasys. The distribution of the species in relation to the nature of the biotope, has also been reported. A new macrodasyoid gastrotrich family, Planodasyidae, is established to comprise the new genus Planodasys and the genus Crasiella Clausen, 1968.
TL;DR: The intracellular symbiotic microorganisms of cockroaches (Blattidae) possess cytological and ultrastructural features of both Grampositive and Gram-negative bacteria, as well as of rickettsiae, and are the only known symbiote of the Blattidae.
TL;DR: Nine genera of the family Podapolipidae are recognized and two species are recognized in the genus Locustacarus: L. trachealis Ewing and L. buchneri (Stammer).
Abstract: Nine genera of the family Podapolipidae are recognized: Bakerpolipus, Chrysomelobia, Dorsipes, Eutarsopolipus, Locustacarus, Podapolipoides, Podapolipus, Tarsopolipus , and Tetrapolipus . Keys to genera are provided for males and larviform females. Two species are recognized in the genus Locustacarus: L. trachealis Ewing and L. buchneri (Stammer). L. locustae Ewing and Podapolipus solitarius Lavoipierre are found to be junior synonyms of L. trachealis (New Synonymy). A key to separate larviform female, male and female specimens of L. trachealis and L. buchneri is given. Biology and ecology of the species are discussed.
TL;DR: The life cycles of 4 species of stonefly and 11 of mayfly are described, based upon the flight season of the adults and measurements of nymphs collected at all seasons from the Speed River.
Abstract: The life cycles of 4 species of stonefly and 11 of mayfly are described, based upon the flight season of the adults and measurements of nymphs collected at all seasons from the Speed River. It is shown that they fit into all but one of the categories of life cycle that have been described for stream insects in Europe, and that where more than one species of the same genus coexist there is usually a marked difference in the timing of their life histories.
Journal Article•
TL;DR: An extensive comparative morphological survey of the Gnaphalium genus in the context of related Compositae was undertaken, finding that the genus as defined at present is heterogeneous.
Abstract: Summary The current classification of the cudweeds is inadequate. An extensive comparative morphological survey of the genus in the context of related Compositae was undertaken. Twenty-three characters, taken from phyllaries, corollas, achenes, pappus, pollen, and gross morphology, were recorded for a herbarium sample representing Gnaphalium (48 species), Achyrocline (4 species), and Anaphalis (7 species). The attribute records were ordered so as to produce groups in which constituent species were more similar to one another than they were to species in the other groups. The taxonomic manipulations were carried out intuitively. The resulting scheme lends no support to the two traditional Gnaphalium sections in vogue for over a century and, more seriously, the genus as defined at present is heterogeneous. The Gnaphalium species are redistributed among three very distinct major groups. The three kinds of Gnaphalium are termed gnaphalioid, achyroclinoid, and anaphalioid cudweeds. One group, embracing 80% of ...
TL;DR: The present analysis attempts to lay the groundwork for a uniform usage of combinatiomnas of criteria in comparative taxonomic studies of Tetrahymena and other relatively undifferentiated hymenostome species which possibly will be of some value in the whole area of ciliate systematics.
Abstract: SYNOPSIS. It has been 10 years since the taxonomic composition of the important hymenostome genus Tetrahymena has been given overall consideration, and even then the treatment was not extensive. New data of significance have been accumulated and a fresh analysis is clearly in order. Also today we recognize that entire assemblages or combinations of characteristics must be considered in understanding the species-composition of a protozoan genus, and such an approach has never been uniformly applied in a comparative systematic study of all ciliates belonging to the Tetrahymena group.
Three complexes within the genus may now be identified. In the 1st, the pyriformis complex, are placed T. pyriformis (the type-species), T. setifera, and T. chironomi. In the 2nd, the rostrata group, are assigned T. rostrata, T. limacis, T. corlissi, and T. stegomyiae. In the 3rd, the patula complex, are found T. patula, T. vorax, and T. paravorax. Three additional, formerly independent species are here recognized as doubtful forms: T. faurei, T. glaucomaeformis, and T. parasitica.
In spite of some overlapping in certain characters, such as total number of kineties or ciliary meridians, the 3 complexes may be considered distinctive on the basis of constellations of features of taxonomic value, including physiologic and morphogenetic as well as structural characteristics. Yet within each complex it is possible to differentiate clearly a number of separate species. The present analysis in no way closes the door to discovery of still additional, new species of Tetrahymena in the future, but it attempts to lay the groundwork for a uniform usage of combinatiomnas of criteria in comparative taxonomic studies of these and other relatively undifferentiated hymenostome species which possibly will be of some value in the whole area of ciliate systematics.
TL;DR: Four clonal strains of amoebae isolated from salt-water habitats of the Maine coast show the characteristic Nebenkorper or paranucleus of the genus Paramoeba Schaudinn, 1896, this being the first report of free-living members of that genus from North America.
Abstract: SYNOPSIS Four clonal strains of amoebae isolated from salt-water habitats of the Maine coast show the characteristic Nebenkorper or paranucleus of the genus Paramoeba Schaudinn, 1896, this being the first report of free-living members of that genus from North America. The isolates are identified as 2 species, P. pemaquidensis n. sp. and P. aestuarina n. sp. In form and mitotic pattern, these 2 species resemble members of the family Mayorellidae.
01 Jan 1970
TL;DR: Distributional data for sixty-two flavonoids and two coumarins in all 17 spp.
TL;DR: The systematics of the endemic New Zealand genus Paranephrops (Family Parastacidae) are re‐examined and specific characters previously used to separate P. zealandicus and P. setosus are considered to be inadequate, and the two species are merged.
Abstract: Summary The systematics of the endemic New Zealand genus Paranephrops (Family Parastacidae) are re‐examined. Specific characters previously used to separate P. zealandicus and P. setosus are considered to be inadequate, and the two species are merged. The genus, as now proposed, contains only two species: P. planifrons, occupying the Whole of the North Island and northern and western areas of the South Island, and P. zealandicus, occupying eastern and southern parts of the South Island and Stewart Island.