Revision of the unusual Carboniferous ophiuroid Cholaster (Echinodermata) and remarks on skeletal differentiation within the Asterozoa

AbstractNewly discovered, relatively well-preserved specimens ofCholaster whitein. sp. (Ophiuroidea, Echinodermata) are described from a small area of extensive outcrop of the Bangor Limestone (Mississippian, Chesterian) exposed on the edge of Cedar Creek Reservoir in northern Alabama, USA. The only other known species of the genus,C.peculiarisWorthen and Miller, is based on a single specimen exposed in dorsal aspect and collected from strata of similar age from southwestern Illinois. Incomplete preservation of the singleC.peculiarisspecimen limits comparisons, but differences between the two occurrences support separation at the species level.Skeletal remains of both asteroids and ophiuroids are first recognized from Early Ordovician sediments, and representatives of the two classes have retained plesiomorphies or converged morphologically since that time, thereby suggesting important evolutionary potentials and limitations.Cholasteris asteroid-like and unusual among ophiuroids in that the arms are comparatively broad and strap-like, and lateral ossicles are similar to asteroid adambulacrals and marginals, whereas the “vertebrae” (i.e., fused axial pair) and oral frame configurations ofC. whitein. sp. are typical of the Ophiuroidea. The oral frame ofC. peculiarisis unknown.A poorly preserved specimen of the asteroidDelicaster? also was recovered from nearby strata associated with theC. whitein. sp.UUID:http://zoobank.org/e0eea445-58e5-4096-80c1-a65964832ef6

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Electrophoretic Resolution of Species Boundaries in Australian Microchiroptera. IV. The Molossidae (Chiroptera)

Australian Journal of Biological Sciences ◽

10.1071/bi9880315 ◽

1988 ◽

Vol 41 (3) ◽

pp. 315 ◽

Cited By ~ 34

Author(s):

M Adams ◽

TR Reardon ◽

PR Baverstock ◽

CHS Watts

Keyword(s):

Species Level ◽

Species Boundaries ◽

Allozyme Electrophoresis ◽

Single Specimen ◽

Data Support ◽

Electrophoretic Data ◽

Current Species ◽

Electrophoretic Resolution

Allozyme electrophoresis of 35 loci in 156 specimens of Australian bats belonging to the Molossidae was used to help elucidate the species-level taxonomy of the group in Australia. The electrophoretic data support the current species-level taxonomy of Tadarida australis and Chaerephon jobensis. However, for specimens currently allocated to the genus Mormopterus, the electrophoretic data fail to support any previous species-level account. On the electrophoretic data, a minimum of five species of the genus Mormopterus occur in Australia. A single specimen of a sixth species, whose generic affinities are undetermined, was also found.

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5 All Other Remains

Memoirs of the Society for American Archaeology ◽

10.1017/s0081130000002100 ◽

1969 ◽

Vol 23 ◽

pp. 46-53

Author(s):

Roberta S. Greenwood

Keyword(s):

Skeletal Remains ◽

Work Of Art ◽

Undisturbed Soil ◽

Delicate Balance ◽

Dorsal Aspect

Perhaps the most remarkable discoveries at the Browne site are the two effigy-like sculptures in-the-round. The larger of these was found in situ in undisturbed soil at a depth of one foot. It lay dorsal aspect uppermost in a portion of the site which yielded many of the grinding tools, and was within 10 inches of a mano. It measures 16.5 cm. in length, 11.8 cm. in diameter at the mid-point, and 7.5 cm. in height. It weighs 2,834 gr.The figure is a thoroughly sophisticated work of art with masterly handling of the plane surfaces and a delicate balance from both front to back and side to side. Although at first glance it resembles a fish, the absence of fishing equipment and skeletal remains makes it improbable that fish were either economically or ritually important at the site and therefore would be unlikely subjects for the artist. It is more likely the representation of a toad or frog. The protuberant eyes, pointed jaw, and V-shaped mouth all suggest an amphibian or some intermediate evolutionary form.

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Unnoticed arrival of two dipteran species in Austria: the synanthropic moth fly Clogmia albipunctata (Williston, 1893) and the parasitic bird louse fly Ornithoica turdi (Olivier in Latreille, 1811)

Parasitology Research ◽

10.1007/s00436-019-06563-9 ◽

2019 ◽

Vol 119 (2) ◽

pp. 737-740 ◽

Cited By ~ 1

Author(s):

Carina Zittra ◽

Ellen R. Schoener ◽

Rüdiger Wagner ◽

Mike Heddergott ◽

Georg G. Duscher ◽

...

Keyword(s):

Monitoring Program ◽

Species Level ◽

Reference Sequence ◽

Single Specimen ◽

Veterinary Importance ◽

Clogmia Albipunctata ◽

Dipteran Species ◽

Mosquito Monitoring

AbstractIn the framework of a mosquito-monitoring program conducted from 2014 to 2018, non-culicid dipteran bycatch was identified to species-level with a focus on Diptera of medical and veterinary importance as part of a biodiversity initiative and barcoding project (“Austrian Barcode of Life”). Two species hitherto not known from Austria, the regularly sampled synanthropic moth fly Clogmia albipunctata (Psychodidae) and a single specimen of the louse fly Ornithoica turdi (Hippoboscidae), were collected in Vienna and Lower Austria. We confirmed identification results using a barcoding approach and provide the first reference sequence for O. turdi.

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New edrioasterine and astrocystitid (Echinodermata: Edrioasteroidea) from the Ninemile Shale (Lower Ordovician), central Nevada

Journal of Paleontology ◽

10.1017/jpa.2014.29 ◽

2015 ◽

Vol 89 (2) ◽

pp. 346-352 ◽

Cited By ~ 5

Author(s):

James Sprinkle ◽

Colin D. Sumrall

Keyword(s):

Floor Plate ◽

Bottom Surface ◽

Single Specimen ◽

Early Ordovician ◽

New Information ◽

Lower Ordovician ◽

Rare Group ◽

Cover Plates

AbstractThe new edrioasterinePseudedriophus guensburgin. gen. n. sp., is described from the Lower Ordovician Ninemile Shale of central Nevada based on three complete to partial small specimens, a well-preserved large ambulacrum, and an isolated ambulacral floor plate. The weathered-out holotype of this edrioasterine exposes the bottom surface of the theca that bears an aboral collar, peduncular stalk, and attachment disk, features that are poorly known in this clade. These specimens were found with a single specimen of a new edrioblastoid,Porosublastus inexpectusn. gen. n. sp., only the second edrioblastoid ever found in the Early Ordovician. Some of the ambulacral cover plates are stripped off one of the ambulacal grooves, revealing new information about how the ambulacra are built in this rare group of bud-shaped edrioasteroids.

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Rocking Beam Microarea Diffraction Applied to Metallic thin Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100091962 ◽

1976 ◽

Vol 34 ◽

pp. 396-397

Author(s):

R. H. Geiss

Keyword(s):

Thin Films ◽

Electron Diffraction ◽

Small Area ◽

Objective Lens ◽

Electron Optics ◽

Metallic Thin Films ◽

Transmission Electron Diffraction ◽

Transmission Electron ◽

Sample Height ◽

Scanning Transmission

The theory and practical limitations of micro area scanning transmission electron diffraction (MASTED) will be presented. It has been demonstrated that MASTED patterns of metallic thin films from areas as small as 30 Åin diameter may be obtained with the standard STEM unit available for the Philips 301 TEM. The key to the successful application of MASTED to very small area diffraction is the proper use of the electron optics of the STEM unit. First the objective lens current must be adjusted such that the image of the C2 aperture is quasi-stationary under the action of the rocking beam (obtained with 40-80-160 SEM settings of the P301). Second, the sample must be elevated to coincide with the C2 aperture image and its image also be quasi-stationary. This sample height adjustment must be entirely mechanical after the objective lens current has been fixed in the first step.

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