A Single Specimen Approach for

2009 ◽  
pp. 397-397-18 ◽  
Author(s):  
MH Sharobeam ◽  
JD Landes
Keyword(s):  
Single Specimen

A new, giant ricinuleid (Arachnida, Ricinulei), from the Pennsylvanian of Illinois, and the identification of a new, ontogenetically stable, diagnostic character

2020 ◽  
pp. 1-12
Author(s):  
Niall Whalen ◽  
Paul Selden
Keyword(s):  
Body Size ◽  
Statistical Analyses ◽  
Diagnostic Character ◽  
Single Specimen

Abstract A new fossil ricinuleid, Curculioides bohemondi n. sp., from the Pennsylvanian Energy Shale of Illinois is described from a single specimen. It is the largest ricinuleid species yet described, living or extinct. The Energy Shale represents a new geographic locale for fossil ricinuleids, a sparsely distributed group. The species is distinguished from other members within the genus by the possession of very large (0.09 mm) carapace tubercles at a very low (30 mm-2) density. Statistical analyses are performed on extant and fossil ricinuleids to determine how their tubercles change throughout ontogeny, culminating in the recovery of a new ontogenetically stable diagnostic character: the tubercle coefficient (a measure of the size of the tubercles relative to body size). UUID: http://zoobank.org/aa9f2de5-c49d-4f70-bba5-db12fdee406f.

scholarly journals Split-footed lacewings declined over time: indications from the morphological diversity of their antlion-like larvae

PalZ ◽  
2021 ◽  
Author(s):  
Gideon T. Haug ◽  
Carolin Haug ◽  
Serita van der Wal ◽  
Patrick Müller ◽  
Joachim T. Haug
Keyword(s):  
Morphological Diversity ◽  
Single Specimen ◽  
Burmese Amber ◽  
The Past ◽  
The World ◽  
Poor Group ◽  
Outline Analysis ◽  
Loss Of Diversity ◽  
Over Time ◽  
Antlion Larvae

AbstractNymphidae, the group of split-footed lacewings, is a rather species-poor group. Split-footed lacewings nowadays are restricted to Australasia, while fossil forms are also known from other areas of the world, indicating that the group was more species-rich and therefore likely diverse in the past. Split-footed lacewings have rather distinct larvae, roughly resembling antlion larvae, but differing from the latter especially with regard to the mandibles. Antlion larvae usually have three prominent teeth on each mandible, while at least extant larvae of split-footed lacewings only have a single prominent tooth per mandible. Fossils interpreted as larvae of split-footed lacewings are well known from amber from Myanmar (ca. 100 myr; Burmese amber) and by a single specimen from Baltic amber (about 40 myr). We here report additional fossil specimens from Myanmar amber, expanding the known record of fossil forms from six depicted specimens to 15. For the extant fauna, we could compile 25 larvae. We compare the diversity of shape of extant and fossil larvae through time using an outline analysis (based on elliptic Fourier transformation) of the head. The results of this analysis indicate that the morphological diversity, or disparity, of split-footed lacewing larvae was higher in the past than it is today. With this type of analysis, we can show a loss of diversity over time, without the necessity to identify the fossil larvae down to a narrow taxonomical range. A similar pattern has already been recognised in silky lacewings, Psychopsidae. This might indicate a general loss of diversity of lacewing larvae.

scholarly journals The Histology of The Oral Mucosa of Macaca Irus

1967 ◽  
Vol 1 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Lawrence Cohen
Keyword(s):  
Oral Mucosa ◽  
Granular Layer ◽  
Single Specimen

Summary The histology of the oral mucosa of Macaca irus was studied in nineteen monkeys. It was found that the oral mucosa of this monkey is identical with that of man. No single specimen of M. irus had orthokeratinization of the gingivae in all regions. In addition, those sections of gingiva which exhibited orthokeratosis had a poorly developed granular layer. Thus it seems unlikely that keratohyalin granules contribute towards keratinization; they probably represent cytoplasmic debris.

Validation of the name Vochysia moskovitsiana (Vochysiaceae), with corrected type citation

Phytotaxa ◽  
2016 ◽  
Vol 277 (3) ◽  
pp. 293
Author(s):  
ISAU HUAMANTUPA CHUQUIMACO
Keyword(s):  
International Code ◽  
Single Specimen

The name Vochysia moskovitsiana Huamantupa (2012: 142) was not validly published due to errors in the citation of the holotype. In the type paragraph following the name citation, a single gathering but more than one specimen, E. Gudiño 1190 (QCNE, MO) was cited as the type. This is a defective citation according to the International Code for Nomenclature (ICN) Article 40.7 (McNeill et al. 2012) because a single specimen is not indicated as the holotype. Although a separate collection, Gudiño & Gualinga 1622 (MO), is cited in the caption to Figure 2 as the holotype, the same specimen also appears in the list of paratypes on page 147. Thus the citation of type is entirely ambiguous, and this work does not constitute valid publication.

A new garden eel, Heteroconger fugax (Congridae: Heterocongrinae), from the northwestern Pacific Ocean

Zootaxa ◽  
2018 ◽  
Vol 4418 (3) ◽  
pp. 287 ◽  
Author(s):  
KEITA KOEDA ◽  
TAKUMA FUJII ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
New Caledonia ◽  
Slender Body ◽  
Northwestern Pacific ◽  
Single Specimen ◽  
Ryukyu Archipelago ◽  
Northwestern Pacific Ocean ◽  
Pectoral Fin ◽  
Dorsal Fin

Heteroconger fugax sp. nov. (Congridae: Heterocongrinae) is described from a single specimen collected from Amami-oshima island, Japan. The new species is most similar to Heteroconger tomberua Castle & Randall 1999, known from Fiji and New Caledonia, in having a remarkably slender body with numerous small spots and a vertebral count close to 200. However, it can be distinguished from H. tomberua by the presence of a large distinct white blotch on the opercle; more numerous, dense spots over the entire head, including lips; ground color of body uniformly cream, without microscopic melanophores; numerous small conical cirri on the chin; and dorsal-fin origin located more posteriorly to appressed pectoral-fin tip. A survey of underwater photographs of Heteroconger on photographic database revealed H. fugax to be widely distributed in the northwestern Pacific Ocean, from the Ryukyu Archipelago to Borneo.

ALYPIA OCTOMACULATA

1882 ◽  
Vol 14 (12) ◽  
pp. 228-228
Author(s):  
H. H. Lyman
Keyword(s):  
Single Specimen ◽  
Public Gardens ◽  
The Public ◽  
The City

Last June I was in Boston, from the 14th to the 30th, and during this time Alypia octomaculata was in season and very abundant. Had I chosen to carry a net in the public gardens and uptown streets, I suppose I could have taken a couple of hundred specimens, always provided that I wasn't “run in” as a lunatic. As it was, I contented myself with carrying a supply of pill boxes, and succeeded in taking about thirty-five specimens. During two days I was visiting a friend about seven miles from the city, but did not see a single specimen of this species; but in those streets in which there were small plots of grass in front of the houses, they were very common. The spot where I took the most of those I captured was a plot of grass about ten feet by seven, in which there was a Syringa between two Deutzias, both species of shrubs being in blossom.

Brachiella obesa, a Parasitic Copepod of Trigla cuculus, with a Description of the Male

Parasitology ◽  
1928 ◽  
Vol 20 (1) ◽  
pp. 25-31 ◽  
Author(s):  
W. Harold Leigh-Sharpe
Keyword(s):  
Parasitic Copepod ◽  
Single Specimen ◽  
Parasitic Copepoda

This species has received so few notices from collectors of parasitic Copepoda that it might be judged uncommon. Thus Krøyer (1837), originally placed it in the genus Lernaeopoda having but a single specimen at his disposal the host of which he had forgotten; subsequently it has been recorded by Olsson (1869), who was the first to place it correctly in the genus Brachiella. This species has also been recorded by P. J. van Beneden (1870), by T. Scott (1901), by A. Scott (1904), and collected by L. Harrison Matthews, as mentioned by me (1926), at Plymouth.

A revision of Xinjiangchelys oshanensis (Ye, 1973), and new material from the Middle Jurassic of Lufeng, Yunnan Province, China

2015 ◽  
Vol 186 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Haiyan Tong ◽  
Zhiming Dong ◽  
Tao Wang
Keyword(s):  
Middle Jurassic ◽  
Yunnan Province ◽  
Shell Morphology ◽  
Single Specimen ◽  
Systematic Revision ◽  
Additional Information ◽  
New Material

Abstract Xinjiangchelys oshanensis (Ye, 1973) was originally described as Plesiochelys oshanensisYe, 1973 from the Jurassic Upper Lufeng series of Eshan, Yunnan Province, China. The species was based on a single specimen (IVPP V4444), a damaged shell with articulated carapace and plastron. This species was later referred to as Xinjiangchelys? oshanensis and X. oshanensis respectively, but has never been revised and often overlooked in the studies of Asian Mesozoic turtles. In this paper, we provide the systematic revision of X. oshanensis (Ye, 1973) after new restoration of the specimen. Five additional shells from the Middle Jurassic Chuanjie Formation of Lufeng, Yunnan Province, China are referred to this species. Our study confirms the validity of the species and its assignment to the genus Xinjiangchelys. The study of the new material completes the shell morphology of X. oshanensis and provides additional information about its age.

Unexpected low-grade infections in revision hip arthroplasty for aseptic loosening

2021 ◽  
Vol 103-B (6) ◽  
pp. 1070-1077
Author(s):  
Christian Hipfl ◽  
Wiebke Mooij ◽  
Carsten Perka ◽  
Sebastian Hardt ◽  
Georgi I. Wassilew
Keyword(s):  
Aseptic Loosening ◽  
Hip Arthroplasty ◽  
Joint Infection ◽  
Implant Failure ◽  
Revision Hip Arthroplasty ◽  
Coagulase Negative Staphylococcus ◽  
Histopathological Analysis ◽  
Low Grade ◽  
Single Specimen ◽  
Musculoskeletal Infection

Aims The purpose of this study was to evaluate unexpected positive cultures in total hip arthroplasty (THA) revisions for presumed aseptic loosening, to assess the prevalence of low-grade infection using two definition criteria, and to analyze its impact on implant survival after revision. Methods A total of 274 THA revisions performed for presumed aseptic loosening from 2012 to 2016 were reviewed. In addition to obtaining intraoperative tissue cultures from all patients, synovial and sonication fluid samples of the removed implant were obtained in 215 cases (79%) and 101 cases (37%), respectively. Histopathological analysis was performed in 250 cases (91%). Patients were classified as having low-grade infections according to institutional criteria and Musculoskeletal Infection Society (MSIS) International Consensus Meeting (ICM) 2013 criteria. Low-grade infections according to institutional criteria were treated with targeted antibiotics for six weeks postoperatively. Implant failure was defined as the need for re-revision resulting from periprosthetic joint infection (PJI) and aseptic reasons. The mean follow-up was 68 months (26 to 95). Results Unexpected positive intraoperative samples were found in 77 revisions (28%). Low-grade infection was diagnosed in 36 cases (13%) using institutional criteria and in nine cases (3%) using MSIS ICM 2013 criteria. In all, 41 patients (15%) had single specimen growth of a low-virulent pathogen and were deemed contaminated. Coagulase-negative Staphylococcus and anaerobes were the most commonly isolated bacteria. Implant failure for PJI was higher in revisions with presumed contaminants (5/41, 12%) compared to those with low-grade infections (2/36, 6%) and those with negative samples (5/197, 3%) (p = 0.021). The rate of all-cause re-revision was similar in patients diagnosed with low-grade infections (5/36, 14%) and those with presumed contaminants (6/41, 15%) and negative samples (21/197, 11%) (p = 0.699). Conclusion Our findings suggest that the presumption of culture contamination in aseptic revision hip arthroplasty may increase the detection of PJI. In this cohort, the presence of low-grade infection did not increase the risk of re-revision. Further studies are needed to assess the relevance of single specimen growth and the benefits of specific postoperative antibiotic regimens. Cite this article: Bone Joint J 2021;103-B(6):1070–1077.

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