scholarly journals A First Account of Freshwater Potamolepid Sponges (Demospongiae, Spongillina, Potamolepidae) from the Middle Eocene: Biogeographic and Paleoclimatic Implications

2013 ◽  
Vol 87 (3) ◽  
pp. 373-378 ◽  
Author(s):  
Andrzej Pisera ◽  
Peter A. Siver ◽  
Alexander P. Wolfe
Keyword(s):  
New Species ◽  
Lake Sediments ◽  
High Latitude ◽  
Middle Eocene ◽  
Water Bodies ◽  
Northern Canada ◽  
Tropical Water ◽  
A New Species

We report the oldest fossil occurrence of freshwater potamolepid sponges (Demospongiae, Spongillina, Potamolepidae) to date, originating from middle Eocene lake sediments accumulated in the Giraffe kimberlite maar, northern Canada. Sponges are represented by strongyle spicules that are gemmuloscleres. These are described herein as belonging to a new species,Potamophloios canadensis. Because the most similar extant potamolepid sponges inhabit subtropical to tropical water bodies, these observations provide further evidence of biogeographic reorganizations in response to warm high-latitude Eocene paleoclimates.

scholarly journals A new species of Alonella Sars, 1862 (Crustacea: Cladocera: Chydoridae) from the Ecuadorian Andes

Zootaxa ◽  
2017 ◽  
Vol 4290 (3) ◽  
pp. 581 ◽  
Author(s):  
MIGUEL ALONSO ◽  
ALEXEY KOTOV
Keyword(s):  
New Species ◽  
High Altitude ◽  
Morphological Characteristics ◽  
Water Bodies ◽  
A New Species

Several authors have pointed out that the Andean high altitude waters constitute a very interesting hotspot of biodiversity. Studies of these water bodies could significantly increase the number of Neotropical endemics among the Cladocera. One of the above mentioned taxa is described here as Alonella hampelae sp. nov. (Crustacea: Cladocera: Chydoridae). This new species belongs to the “excisa­clathratula” group, characterized by the carapace strongly reticulated and bearing fine striae within the cells of reticulation, but presents several specific morphological characteristics. The most outstanding is the evenly rounded posteroventral angle of the valves that lack any denticles, which is unique within the genus Alonella Sars, 1862. 

scholarly journals A Middle Eocene Shorebird from China

The Condor ◽  
2002 ◽  
Vol 104 (4) ◽  
pp. 896-899 ◽  
Author(s):  
Lianhai Hou ◽  
Per G. P. Ericson
Keyword(s):  
New Species ◽  
Middle Eocene ◽  
Jilin Province ◽  
General Morphology ◽  
The Family ◽  
Charadrius Vociferus ◽  
A New Species

Abstract We describe a new species of shorebird, tentatively referred to the family Charadriidae, from the Huadian Formation (Middle Eocene) in Jilin Province, China. In general morphology the specimen closely matches that of an extant charadriid, and corresponds in size to the Killdeer (Charadrius vociferus). If correctly identified this is the oldest record of the Charadriidae. The Middle Eocene paleoenvironment of the Huadian region is thought to have resembled a subtropical swamp. Un Ave Playera de China del Eoceno Medio Resumen. Describimos una nueva especie de ave playera, tentativamente clasificada como de la Familia Charadriidae, de la Formación Huadian (Eoceno Medio) en la Provincia de Jilin, China. En términos de morfología general, el ejemplar coincide mayormente con la morfología de un charádrido actual, y se asemeja en tamaño a Charadrius vociferus. Si la identificación es correcta, este representa el registro más antiguo para la Familia Charadriidae. El paleoambiente del Eoceno Medio de la región de Huadian se asemejaba probablemente a un pantano subtropical.

A new species and taxonomic notes on northern Nearctic Cerodontha (Icteromyza) (Diptera: Agromyzidae)

2008 ◽  
Vol 140 (5) ◽  
pp. 557-562 ◽  
Author(s):  
Stéphanie Boucher
Keyword(s):  
New Species ◽  
North America ◽  
Yukon Territory ◽  
Palaearctic Species ◽  
Northern Canada ◽  
First Time ◽  
A New Species

AbstractCerodontha (Icteromyza) pilosan. sp. is described from the Yukon Territory. The Palaearctic species C. (I.) lineella (Zetterstedt) is recorded for the first time in North America, based on specimens from northern Canada and Alaska, and C. (I.) pollinosa (Melander) is synonymized with C. lineella. Cerodontha pilosa is most similar to C. (I.) longipennis (Loew) and C. (I.) lineella. Distinguishing characters and a modification of Spencer’s key to Canadian species of Cerodontha are given to separate these species.

Discovery of a new species of the Cretaceous genus Microphorites Hennig, 1971 (Diptera: Dolichopodidae s. lat.) in Paleogene amber from eastern Moravia (Czech Republic)

2016 ◽  
Vol 47 (2) ◽  
pp. 181-193 ◽  
Author(s):  
Michal Tkoč ◽  
André Nel ◽  
Jakub Prokop
Keyword(s):  
Czech Republic ◽  
New Species ◽  
Middle Eocene ◽  
Wing Venation ◽  
Extant Species ◽  
Radial Vein ◽  
Complete Cell ◽  
Geochemical Analyses ◽  
Extinct Genus ◽  
A New Species

A new species of the extinct genusMicrophoritesHennig, 1971 (Dolichopodidae s. lat.: Microphorinae) is described from a single female preserved in Študlov amber (Moravia, Czech Republic), currently dated from the Paleocene to the middle Eocene.Microphorites moravicussp. n. has the typical wing venation of the genus, e.g., three radial veins, crossvein r-m, crossvein bm-cu complete, cell dm, two medial veins and vein CuA1. It differs from the other species ofMicrophoritesby the long antenna, with prolonged and laterally compressed first flagellomere and presence of a pterostigma at the fusion of the first radial vein and costa. A comparison ofM. moravicuswith all other species ofMicrophorites, as well as fossil and extant species ofMicrophorMacquart, 1827 is given. The age and source plant of Študlov amber is discussed in terms of newly performed geochemical analyses.

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