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.

scholarly journals Oropuella, a new genus of Orthocladiinae from the western Nearctic

2020 ◽  
pp. 17-30
Author(s):  
Andrew Fasbender
Keyword(s):  
North America ◽  
New Genus ◽  
Novel Species ◽  
Life Stages ◽  
Western North America ◽  
Current State ◽  
Species Taxonomy

A new genus and two species of the subfamily Orthocladiinae are described from western North America. Oropuella gen. n. shows affinities to Parametriocnemus Goetghebuer and Paraphaenocladius Thienemann, but can be distinguished by morphology for all life stages. Two novel species are placed in the new genus, Oropuella eidolon sp. n and Oropuella pallida sp. n. Amendments to current genus keys are given to incorporate the new genus, and the current state of Orthocladiinae species taxonomy in the western Nearctic is discussed.

A review of the ectoparasitic Leptinus beetles of North America (Coleoptera: Leptinidae)

1982 ◽  
Vol 60 (7) ◽  
pp. 1517-1527 ◽  
Author(s):  
Stewart B. Peck
Keyword(s):  
United States ◽  
North America ◽  
Mississippi River ◽  
Western North America ◽  
Land Bridge ◽  
Blarina Brevicauda ◽  
Bering Land Bridge ◽  
Early Tertiary ◽  
The Family ◽  
Central United States

Leptinus beetles are facultative ectoparasites known to occur on 18 species of small mammals in North America. Leptinus americanus is restricted to the central United States, west of the Mississippi River. Its hosts and seasonality are unknown. Leptinus orientamericanus n.sp. is widespread east of the Mississippi River. It occurs on seven hosts, most frequently on Blarina brevicauda and Scalopus aquaticus and during fall and winter months. Leptinus occidentamericanus n.sp. has a range in western North America from California to Alaska and the Yukon. It occurs on 11 hosts, most frequently on Sorex trowbridgii, and during spring and fall months. A hypothesis of evolution is given for all nine species in the genus. It suggests a Palaearctic origin for the family and genus and an early Tertiary entry to North America by a Bering land bridge.

Kochiella Poulsen, 1927, and Hadrocephalites new genus (Trilobita: Ptychopariida) from the early Middle Cambrian of western North America

2002 ◽  
Vol 76 (1) ◽  
pp. 76-94 ◽  
Author(s):  
Frederick A. Sundberg ◽  
Linda B. McCollum
Keyword(s):  
New Species ◽  
North America ◽  
New Genus ◽  
Western North America ◽  
Type Specimens ◽  
Middle Cambrian ◽  
Informal Group ◽  
Nomen Dubium

Kochaspids are an informal group of ptychopariid trilobites that were both abundant and widespread in the early Middle Cambrian of North America. Based on the reassociation of pygidia and cranidia of some kochaspids, Kochiella Poulsen, 1927, is redefined and Hadrocephalites n. gen. is proposed. Hadrocephalites includes taxa previously assigned by Rasetti and Palmer to Schistometopus Resser, 1938a. Schistometopus is considered nomen dubium. Representatives of Kochiella and Hadrocephalites from the Pioche Shale and Carrara Formation of Nevada are described, including the new species Kochiella rasettii, K. brevaspis, Hadrocephalites lyndonensis, and H. rhytidodes. Other kochaspids previously assigned to Kochaspis Resser, 1935; Eiffelaspis Chang, 1963; Schistometopus; and Kochiella are discussed and some are reassigned. The type specimens of Kochiella augusta (Walcott, 1886); K. crito (Walcott, 1917b); K. chares (Walcott, 1917a); K. mansfieldi Resser, 1939; K. arenosa Resser, 1939; Hadrocephalites carina (Walcott, 1917b), and H. cecinna (Walcott, 1917b) are re-illustrated.

Two new genera of Nearctic Chamaemyiidae (Diptera: Lauxanioidea) associated with Cinara aphids (Hemiptera: Aphididae) on Pinus

Zootaxa ◽  
2020 ◽  
Vol 4852 (1) ◽  
pp. 61-82
Author(s):  
STEPHEN D. GAIMARI
Keyword(s):  
United States ◽  
North America ◽  
Pinus Ponderosa ◽  
Type Species ◽  
Immature Stages ◽  
New Genera ◽  
Western North America ◽  
Southwestern United States ◽  
The Third

Two new genera of Chamaemyiidae (Diptera: Lauxanioidea) are described and illustrated, including: Chamaethrix gen. nov. (type species Chamaethrix necopina sp. nov.), possibly a predator of Cinara ponderosae (Williams) on Pinus ponderosa in the southwestern United States; and Vitaleucopis gen. nov. (type species Vitaleucopis nidolkah sp. nov.; other included species Vitaleucopis astonea (McAlpine), comb. nov., and Vitaleucopis scopulus sp. nov.), predators of Cinara aphids and possibly adelgids on Pinaceae in western North America. Immature stages are discussed or described and illustrated for some taxa, including the eggs of Chamaethrix necopina and Vitaleucopis nidolkah; and the third instars and puparia of Vitaleucopis nidolkah. 

Flake Tools in the American Arctic: Some Speculations

1964 ◽  
Vol 29 (3) ◽  
pp. 338-344 ◽  
Author(s):  
Edwin N. Wilmsen
Keyword(s):  
North America ◽  
Central Asia ◽  
New World ◽  
Yukon Territory ◽  
River Delta ◽  
The Arctic ◽  
Land Bridge ◽  
Bering Land Bridge

AbstractTwo sites, Kogruk (at the summit of Anaktuvuk Pass, Alaska) and Engigstciak (at the head of the Firth River delta, Yukon Territory, Canada), have recently yielded flake-tool assemblages which show striking resemblances to a Eurasiatic flake-blade tradition based on a Levallois-Mousterian stone-chipping technique, and to the Clovis flake-blade tradition of America which appears to be based on a similar chipping technique. It is suggested that these traditions are historically related and that the Arctic sites provide a possible link between the two. The presence of incipient fluting in Siberia and at Engigstciak may prove significant. Dating is discussed in terms of the ecology and geology of the sites and is correlated with the probable periods of availability of the Bering land bridge. An upland-foothills zone is seen to be essentially continuous from central Asia to central North America. It is suggested that this zone provided the only environmentally compatible link between the two continents, and that it was therefore the most probable route of early hunting peoples into the New World.

A new genus of cassiduloid echinoid from the lower Eocene of the Pacific coast of western North America and a new report of Cassidulus ellipticus Kew, 1920, from the lower Eocene of Baja California Sur, Mexico

1995 ◽  
Vol 69 (3) ◽  
pp. 509-515 ◽  
Author(s):  
Richard L. Squires ◽  
Robert A. Demetrion
Keyword(s):  
North America ◽  
New Genus ◽  
Baja California ◽  
Pacific Coast ◽  
Middle Part ◽  
Baja California Sur ◽  
Western North America ◽  
Lower Eocene ◽  
Shallow Marine ◽  
The Pacific

The cassiduloid echinoid Calilampas californiensis n. gen. and sp. is described from middle lower Eocene (“Capay Stage”) shallow-marine sandstones in both the middle part of the Bateque Formation, Baja California Sur, Mexico, and the lower part of the Llajas Formation, southern California. The new genus is tentatively placed in family Pliolampadidae. The cassiduloid Cassidulus ellipticus Kew, 1920, previously known only from the “Capay Stage” in California, is also present in “Capay Stage” shallow-marine sandstones of the Bateque Formation.

The Sweetognathus complex in the Permian of China: implications for evolution and homeomorphy

1987 ◽  
Vol 61 (5) ◽  
pp. 1047-1057 ◽  
Author(s):  
Wang Cheng-Yuan ◽  
Scott M. Ritter ◽  
David L. Clark
Keyword(s):  
New Species ◽  
North America ◽  
New Genus ◽  
Late Permian ◽  
Western North America ◽  
Evolutionary Studies ◽  
Complete Sequences ◽  
Iterative Evolution

The well-exposed and fossiliferous Permian carbonates in China have yielded Early and Late Permian species of the Sweetognathus complex that permit worldwide stratigraphic evaluation of members of the group. The sporadic appearance of species of Sweetognathus and related genera throughout the Permian in western North America and Iran, in particular, may represent iterative evolution and homeomorphy. The pectiniform element morphologies of the several species are interpreted as most important for evolutionary studies and document a partial Permian biostratigraphy in China that aids in the interpretation of less complete sequences elsewhere. A new genus, Pseudosweetognathus, and four new species, Pseudosweetognathus costatus, Sweetognathus subsymmetricus, S. paraguizhouensis, and Iranognathus nudus, are described.

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