Review of the genus Pagastia Oliver (Diptera: Chironomidae: Diamesinae) from North America, with description of P. (P.) subletteorum sp. nov.

Zootaxa ◽  
2019 ◽  
Vol 4664 (1) ◽  
pp. 115-128
Author(s):  
EUGENYI A. MAKARCHENKO
Keyword(s):  
North America ◽  
Adult Male ◽  
Generic Diagnosis ◽  
Adult Males

Illustrated description of the adult male of Pagastia (P.) subletteorum sp. nov., redescription of the pupa and adult male of P. (P.) orthogonia Oliver and P. (P.) partica (Roback), with redescription of the adult male of P. (Hesperodiamesa) sequax (Garrett) from North America are provided. An emended generic diagnosis and a key to determination of adult males of all known species of Pagastia Oliver are also provided.  

Pagastia (P.) donoliveri sp. nov.—a new Nearctic alpine stream chironomid species (Diptera: Chironomidae: Diamesinae) from the Beartooth Mountains, Wyoming, U.S.A.

Zootaxa ◽  
2020 ◽  
Vol 4755 (1) ◽  
pp. 171-176
Author(s):  
EUGENYI A. MAKARCHENKO ◽  
DEAN C. HANSEN
Keyword(s):  
North America ◽  
Adult Male ◽  
Chironomid Species ◽  
Alpine Stream ◽  
Holarctic Species

An illustrated description of the adult male of Pagastia (P.) donoliveri sp. nov. from the Beartooth Mountains, Wyoming, of North America is provided. An updated key to the determination of all known Holarctic species of Pagastia Oliver for males is also provided.  

Bilyjomyia, a new genus of the tribe Macropelopiini from the Holarctic (Diptera: Chironomidae)

Zootaxa ◽  
2009 ◽  
Vol 2166 (1) ◽  
pp. 57-68 ◽  
Author(s):  
HIROMI NIITSUMA ◽  
CHARLES N. WATSON JR.
Keyword(s):  
North America ◽  
Adult Male ◽  
New Genus ◽  
Generic Diagnosis ◽  
Immature Stages ◽  
Life Stages ◽  
Western North America ◽  
Posterior Edge ◽  
Land Bridge ◽  
Bering Land Bridge

The genus Bilyjomyia is erected for Apsectrotanypus algens (Coquillett, 1902) from western North America and B. fontana n. sp. from Japan. A generic diagnosis and a description are given for all life stages. Bilyjomyia algens is redescribed. All life stages of Bilyjomyia fontana are described and figured. The new genus shows affinities to Macropelopia Thienemann and Bethbilbeckia Fittkau et Murray in the immature stages. Bilyjomyia can be distinguished from all other known Macropelopiini by the following features: the reduced setation of T.IX and the restriction of these setae to the tergal posterior edge in the adult male; the aeropyles of the thoracic horn in the pupa; the labral sclerite and the position and form of the ventral cephalic setae in the larva. The distribution of Bilyjomyia indicates dispersal across the Bering Land Bridge, a pattern known in some other genera of Chironomidae and other orders of insects.

HAPTEN-RADIOIMMUNOASSAY OF PLASMA OESTRADIOL

1973 ◽  
Vol 72 (2) ◽  
pp. 330-344 ◽  
Author(s):  
Peter Doerr
Keyword(s):  
Adult Male ◽  
Normal Values ◽  
Normal Adult ◽  
Adult Males ◽  
Reagent Blank ◽  
Keyhole Limpet Haemocyanin ◽  
Ether Extraction ◽  
The Mean ◽  
Assay Precision ◽  
Plasma Oestradiol

ABSTRACT A hapten-radioimmunoassay for plasma oestradiol is described and information about the reliability of the method is given in detail. Oestradiol-3-hemisuccinate coupled to keyhole limpet haemocyanin is used for immunization of rabbits. The antiserum utilized for the assay is characterized by its titer, affinity and specificity. Following ether extraction and NaOH-light petroleum partition oestradiol is separated from crossreacting oestrogens by TLC. Oxidation of oestradiol on the plate is prevented by mercaptoethanol. To separate free and antibody bound ligand 250 μg dextran-coated charcoal per tube is used in the presence of bovine serum gammaglobulin (1 mg/ml). The between-assay precision based on 15 different determinations of control samples from normal adult male plasma was 9.4% (C. V.). The mean reagent blank value of 31 determinations was equivalent to 0.3 pg oestradiol and the detection limit in terms of the 99% confidence limit for a single blank value, was equivalent to 4.3 pg oestradiol. A procedure for detecting plasma blanks is described. Plasma oestradiol is separated from approximately all concomitant substances originally present in the sample by enzymatic conversion into oestrone and a second TLC. No plasma blanks could be detected with respect to normal adult male plasma. Normal values for adult males based on 51 subjects were characterized by a median of 17.2 pg/ml and the 95 percentiles of 9.5–27.6.

Bonobo baby dominance: Did female defense of offspring lead to reduced male aggression?

2018 ◽  
Author(s):  
Kara Walker ◽  
Brian Hare
Keyword(s):  
Adult Male ◽  
Social System ◽  
Dominant Species ◽  
Potential Solution ◽  
Adult Males ◽  
Male Aggression ◽  
Dominance Style ◽  
The Social ◽  
Initial Support

The dominance style of bonobos presents an evolutionary puzzle. Bonobos are not male dominant but female bonobos do not show traits typical of female-dominant species. This chapter proposes the offspring dominance hypothesis (ODH) as a potential solution. ODH suggests the social system of bonobos evolved as a defence against infanticide and is not due to pressure to monopolize resources. Females that prevented aggression towards offspring and preferred mating with less aggressive males were most successful. Supporting ODH, during observations at Lola ya Bonobo Sanctuary it was found that: 1) adult male bonobos are rarely aggressive towards offspring with mothers, 2) some mother-reared juvenile bonobos attain rank higher than adult males and 3) mother-reared offspring often socially interact with adult males without their mothers nearby. These preliminary findings provide initial support that the bonobo social system evolved due to fitness advantages of effectively protecting offspring against consequences of male aggression. Le style de dominance des bonobos présente un puzzle évolutionnaire. Les bonobos ne sont pas dominés par les mâles mais les bonobos femelles ne montrent pas les traits caractéristiques d’une espèce dominée par femelles. On propose l’hypothèse de dominance de progéniture (ODH) comme une solution potentielle. La ODH suggère que le système social des bonobos a évolué en défense contre l’infanticide et pas sous pression pour la monopolisation des ressources. Les femelles qui préviennent l’agression vers leur progéniture et leur préférence d’accouplement avec des mâles moins agressives étaient très efficaces. À l’appui de la ODH on a trouvé pendant nos observations à Lola ya Bonobo Sanctuary que: 1) les mâles adultes bonobos agressent rarement vers les bébés avec mères, 2) quelques adolescents bonobos qui furent élevés par leurs mères atteignent un rang plus haut que les mâles adultes et 3) la progéniture élevée par la mère interagissent avec avec d’adultes mâles sans la présence de leur mère. Ces trouvailles préliminaires donnent appuie à l’hypothèse que le système social des bonobos a évolué par les avantages corporelles de la protection de la progéniture contre les conséquences de l’agression mâle.

Do centers of origin have a center?

Paleobiology ◽  
1981 ◽  
Vol 7 (3) ◽  
pp. 305-307 ◽  
Author(s):  
John C. Briggs
Keyword(s):  
United States ◽  
North America ◽  
Southeastern United States ◽  
Important Criterion ◽  
Centers Of Origin ◽  
Single Region ◽  
Evolutionary Radiation ◽  
A Current ◽  
Considerable Intensity

A current question being debated with considerable intensity is whether or not certain geographic areas act as centers of evolutionary radiation and supply species to other areas that are less active or less effective in an evolutionary sense. Darwin (1859) was the first to write about centers of origin which he called “single centers of creation.” He argued that each species was first produced within a single region and that it subsequently migrated from that area as far as its powers of migration and subsistence under past and present conditions permitted. Adams (1902), in discussing the influence of the southeastern United States as a center of distribution for the flora and fauna of North America, provided a series of criteria for the determination of “centers of dispersal.” His first, and evidently most important criterion was the location of “the greatest differentiation of a type.”

scholarly journals First record of Ramphocorixa rotundocephala Hungerford, 1927 (Hemiptera, Corixidae) for Colombia

Check List ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 503-506
Author(s):  
Mabel Giovana Pimiento-Ortega ◽  
Isabella González-Gamboa ◽  
Yimy Herrera-Martínez
Keyword(s):  
North America ◽  
South America ◽  
Procambarus Clarkii ◽  
Aquatic Insect ◽  
First Record ◽  
Adult Males ◽  
Northern South America ◽  
The Town

In the course of research conducted on Procambarus clarkii (Girard, 1852) in Colombia, Ramphocorixa rotundocephala Hungerford, 1927 was collected in Güitoque Lake, outside the town of Gachantivá, Boyacá. The species was identified from the adult males found there. This species of aquatic insect occurs mostly in Central and North America, but there are also two records from Venezuela in South America. This is the first record of this species and its genus for Colombia. This finding increases this species’ known distribution on the continent and the diversity of hemipterans in northern South America.

Effects of adults on survival and recruitment of Peromyscus leucopus

1987 ◽  
Vol 65 (10) ◽  
pp. 2519-2523
Author(s):  
Gregory H. Adler ◽  
Mark L. Wilson ◽  
Michael J. DeRosa
Keyword(s):  
Adult Female ◽  
Adult Male ◽  
Peromyscus Leucopus ◽  
Survival Rates ◽  
Adult Males ◽  
Control Grid ◽  
Young Males ◽  
Young Females ◽  
Breeding Seasons ◽  
And Control

A population of Peromyscus leucopus (white-footed mouse) in northeastern Massachusetts was manipulated for 3 years to determine the effects of adults on survival and recruitment. Two experimental grids were established, from which either all adult males or all adult females were removed continually. The effects of these two manipulations were compared with demography on a control grid. Manipulations had no apparent effect on breeding intensity of young, survival rates of adults, or residency rates of adults and young. Recruitment of adult males was higher on the adult male removal grid than on the control grid. Recruitment rates of adult males and of young males and young females were lower on the adult female removal grid than on the control grid. Survival rates of young males were higher on the adult female removal grid than on the control grid; this effect may have been due to either reduced adult female residency or adult male recruitment. All differences between experimental and control grids were noted only during breeding seasons. Adult males apparently limited recruitment of adult consexuals. The effects of manipulations on other measured parameters were inconclusive because of high immigration rates of adult males onto the adult male removal grid and reduced recruitment of adult males and decreased production of young on the adult female removal grid.

A new species of the genus Odonteus (Coleoptera: Geotrupidae) from northern Pakistan

Zootaxa ◽  
2005 ◽  
Vol 968 (1) ◽  
pp. 1
Author(s):  
GIUSEPPE M. CARPANETO ◽  
ROBERTO MIGNANI
Keyword(s):  
New Species ◽  
North America ◽  
Adult Female ◽  
Adult Male ◽  
Similar Species ◽  
Northern Pakistan ◽  
Relict Species ◽  
Old World ◽  
Definition Of ◽  
A New Species

A remarkable new species, Odonteus gandhara Carpaneto & Mignani, n. sp., is described from northern Pakistan. The holotype (adult male) and the paratype (adult female) are illustrated and compared with O. armiger (Scopoli, 1772) and O. orientalis Mittal, 1998, the only two species of this genus recognized in the Old World. Both O. armiger and O. orientalis have the eye not completely divided by the canthus and have a sensory area on the external side of the last antennomere (this character has never been discussed in the literature until now). These two character states in O. armiger and O. orientalis compel emendations to the definition of the genus. The new species has a great zoogeographical relevance because similar species occur in North America (O. obesus LeConte, 1859 and O. falli Wallis, 1928), and probably represents a relict species endemic to the Himalayan range.

Description of the postembryonic stages of Mulcticola macrocephalus (Kellogg, 1896) (Phthiraptera, Ischnocera: Philopteridae)

2020 ◽  
Vol 152 (6) ◽  
pp. 723-733 ◽  
Author(s):  
Kamila M.D. Kuabara ◽  
Michel P. Valim ◽  
Terry D. Galloway
Keyword(s):  
North America ◽  
Adult Female ◽  
Adult Male ◽  
Male Genitalia ◽  
Postembryonic Development ◽  
Chewing Louse ◽  
Line Drawings ◽  
Anterior Dorsal

AbstractThe nymphs I, II, III, and adult male and adult female stages of Mulcticola macrocephalus (Kellogg) (Phthiraptera, Ischnocera: Philopteridae), a monoxenous species of chewing louse infesting common nighthawk, Chordeiles minor (Forster) (Caprimulgiformes: Caprimulgidae), in North America, are described. Line drawings of whole nymphs and adults are presented, as are details of anterior dorsal head plates, metasternal plates, female subvulvar plates, and male genitalia. Ontogenetic characters exhibited during the postembryonic development of this species of chewing louse are described and discussed in relation to previous information in the literature.

Sign in / Sign up

Export Citation Format

Share Document