scholarly journals Variation in the adductor muscle-scar rosette of <i>Darwinula cicatricosa</i> Wakefield, 1994 (Ostracoda, Crustacea), and comparison with other species of <i>Darwinula</i>

1996 ◽  
Vol 15 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Matthew I. Wakefield
Keyword(s):  
Species Identification ◽  
Soft Part ◽  
Adductor Muscle ◽  
Muscle Scar ◽  
Fossil Species ◽  
Recent Species

Abstract. Variation in the morphology of the adductor muscle-scar pattern of Darwinula cicatricosa Wakefield, 1994 is demonstrated, and is shown to affect specific segments within the essentially rosette-shaped scar. Potential subdivisions of individual segments can be identified in fossil specimens as ‘scar-sutures’. All fossil and Recent species of Darwinula studied are shown to have different patterns to their adductor muscle-scar rosette. These differences can be used as an aid in species identification, particularly of fossil species, in which the muscle-scars are the best indicator of soft part morphology.

scholarly journals First record of preserved soft parts in a Palaeozoic podocopid (Metacopina) ostracod, Cytherellina submagna : phylogenetic implications

2011 ◽  
Vol 279 (1728) ◽  
pp. 564-570 ◽  
Author(s):  
E. Olempska ◽  
D. J. Horne ◽  
H. Szaniawski
Keyword(s):  
Soft Part ◽  
First Record ◽  
Copulatory Organ ◽  
Adductor Muscle ◽  
Precise Determination ◽  
Muscle Scar ◽  
Phylogenetic Implications ◽  
Characteristic Features ◽  
Pore Canals

The metacopines represent one of the oldest and most important extinct groups of ostracods, with a fossil record from the Mid-Ordovician to the Early Jurassic. Herein, we report the discovery of a representative of the group with three-dimensionally preserved soft parts. The specimen—a male of Cytherellina submagna —was found in the Early Devonian (416 Ma) of Podolia, Ukraine. A branchial plate (Bp) of the cephalic maxillula (Mx), a pair of thoracic appendages (walking legs), a presumed furca (Fu) and a copulatory organ are preserved. The material also includes phosphatized steinkerns with exceptionally preserved marginal pore canals and muscle scars. The morphology of the preserved limbs and valves of C. submagna suggests its relationship with extant Podocopida, particularly with the superfamilies Darwinuloidea and Sigillioidea, which have many similar characteristic features, including a large Bp on the Mx, the morphology of walking legs, Fu with two terminal claws, internal stop-teeth in the left valve, adductor muscle scar pattern, and a very narrow fused zone along the anterior and posterior margins. More precise determination of affinities will depend on the soft-part morphology of the cephalic segment, which has not been revealed in the present material.

Species identification of dried scallop adductor muscle (yao zhu) products sold on the market

Food Control ◽  
2017 ◽  
Vol 71 ◽  
pp. 83-87 ◽  
Author(s):  
Jing Wen ◽  
Ling Zeng ◽  
Ziming Chen ◽  
Yi Zhou ◽  
Youhou Xu ◽  
...  
Keyword(s):  
Species Identification ◽  
Adductor Muscle

Notes on fossil Bdelloidea 1: the first snout mite (Acariformes: Bdellidae: Odontoscirinae) from the Cretaceous amber of Myanmar

2020 ◽  
Vol 25 (10) ◽  
pp. 1754-1764
Author(s):  
Andrés O. Porta ◽  
Daniel N. Proud ◽  
Peter Michalik ◽  
Fabio Akashi Hernandes
Keyword(s):  
Fossil Record ◽  
Fossil Species ◽  
The Family ◽  
Recent Species ◽  
Mite Genus

A protonymph of the snout mite genus Odontoscirus Thor, 1913, O. cretacico sp. nov., is described and illustrated from Cretaceous amber of Myanmar is described and illustrated, constituting the earliest fossil species described of the family Bdellidae (ca. 99 Ma). After reexamining the literature and recollected specimens from type localities, we conclude that the following five recent species do not belong to the genus Biscirus and should be transferred to Odontoscirus: O. anomalicornis (Berlese 1916) comb. nov., O. symmetricus (Kramer 1898) comb. nov., O. uncinatus (Kramer 1898) comb. nov., O. norvegicus (Thor 1905) comb. nov., and O. insularis (Willmann 1939) comb. nov. The implications of the fossil record of the family is discussed.

New species from Late Cretaceous New Jersey amber and stasis in subfamily Attageninae (Insecta: Coleoptera: Dermestidae)

2016 ◽  
Vol 90 (3) ◽  
pp. 491-498 ◽  
Author(s):  
David Peris ◽  
Jiří Háva
Keyword(s):  
New Jersey ◽  
New Species ◽  
Late Cretaceous ◽  
Diagnostic Features ◽  
Fossil Species ◽  
Detailed Classification ◽  
The Family ◽  
Recent Species ◽  
The Stability ◽  
Synchrotron Microtomography

AbstractA new fossil species of Dermestidae (Insecta: Coleoptera), preserved in Late Cretaceous (Turonian) amber from New Jersey, is described asAttagenus(Aethriostoma)turonianensisn. sp. The specimen is fossilized in translucent amber, but 3D imaging using propagation phase-contrast X-ray synchrotron microtomography allowed detailed classification and description. This species is the oldest representative of the subfamily Attageninae and the third fossil species described in the family from the entire Mesozoic. Dermestidae comprise beetle species that typically feed on carcasses, although some Recent species ofAttagenusLatreille, 1802 are known to feed on plant debris, which is highly abundant in amber deposit sediments. This new species is evidence for diversification in the family during the Early Cretaceous as well as long morphological conservation of diagnostic features of the genusAttagenusfrom the Late Cretaceous. Analyzing the taxa from Mesozoic ambers that show stasis, the small size of the specimens together with a specific ecology could explain the stability of these lineages.

scholarly journals Evolution and skeletal characteristics of European owls

2017 ◽  
Vol 25 (2) ◽  
pp. 65-103 ◽  
Author(s):  
Jenő Eugen Kessler
Keyword(s):  
Fossil Species ◽  
Avian Predators ◽  
Major Significance ◽  
Recent Species ◽  
Owl Pellets ◽  
Extensive Bibliography

Abstract Owls represent typical nocturnal avian predators. They are known since the beginning of the Tertiary. Thirteen species live in Europe, but the number of extinct fossil species is only slightly above twice that number. The present genera appeared in the Neogene period. They also have a major significance regarding palaeoecology, since most of the fossilized remains of small-medium sized vertebrates are available from owl pellets. The author wishes to describe the occurrence and evolution of owls in Europe from the Cretaceous to current times, as well as to provide an osteological guide of recent species. The text is supplemented by 16 plates, 4 size charts, and extensive bibliography.

Current knowledge of the family Cardiliidae (Bivalvia, Mactroidea)

2018 ◽  
Vol 92 (2) ◽  
pp. 130-145
Author(s):  
Javier H. Signorelli ◽  
J.G.M. (Han) Raven
Keyword(s):  
External Surface ◽  
Current Knowledge ◽  
Middle Eocene ◽  
Adductor Muscle ◽  
Fossil Species ◽  
Eastern Atlantic Ocean ◽  
Extant Species ◽  
Range Type ◽  
The Family ◽  
The Western Pacific

AbstractThe family Cardiliidae has been scarcely studied. It was historically placed in the superfamily Mactroidea. Members of this family are characterized by a cordiform shell with a typical mactrid hinge, posterior adductor muscle placed into a myophore and three ornamental areas on the external surface of the shell. Six extant and 14 exclusively fossil species have been previously mentioned in the literature as belonging to the genusCardilia. The geographical distribution, stratigraphic range, type material and type locality of each extant and fossil species are provided. In this work, four extant species and 11 exclusively fossil species belonging to the genusCardiliaare recognized. Extant species are from the western Pacific Ocean, Indian Ocean and eastern Atlantic Ocean, while fossil taxa are recorded from deposits of middle Eocene to late Pliocene in Europe and Asia,. One of them is formally described herein asCardilia edwardsinew species.

Rediscovery of Terebratulina austroamericana Zezina, 1981 (Brachiopoda: Cancellothyrididae) from off northern Chile

Zootaxa ◽  
2018 ◽  
Vol 4407 (3) ◽  
pp. 443 ◽  
Author(s):  
JUAN FRANCISCO ARAYA ◽  
MARIA ALEKSANDRA BITNER
Keyword(s):  
Nineteenth Century ◽  
Population Structure ◽  
Southern Hemisphere ◽  
Marine Invertebrates ◽  
Common Species ◽  
Northern Chile ◽  
Southern Chile ◽  
Fossil Species ◽  
Extant Species ◽  
Recent Species

Phylum Brachiopoda, shelled marine invertebrates, is currently represented by about 400 extant species; a tiny fraction of the ca. 30,000 described fossil species (Emig et al. 2013; Bitner 2014; Nauendorf et al. 2014; Logan et al. 2015). Only twenty of these Recent species are known from the Chilean coasts (Lee et al. 2008), most of them from subtidal waters. Of these, only Magellania venosa (Dixon, 1789) (the largest extant brachiopod) and Discinisca lamellosa (Broderip, 1833) are common species found in the southern and central-northern coasts of the country, respectively. As with other marine invertebrates, brachiopods from the region have been reviewed in few studies, apart from some classic nineteenth century works by Sowerby (1822); Broderip (1833); Davidson (1878, 1888); Dall (1895, 1902, 1908), and by Dall and Pilsbry (1891). More recent studies include Cooper (1973, 1982) and Foster (1989) reviewing brachiopods from the Southern Hemisphere and the extreme South Pacific; Zezina (1981, 1989) describing species from the underwater ridges of the Eastern Pacific; Moyano (1995) who revised all the literature dealing with Brachiopoda in Chile; and most recently Baumgarten et al. (2014) who studied the population structure of Magellania venosa in the fjord region of southern Chile. 

The Silurian Ilionia prisca, oldest known deep-burrowing suspension-feeding bivalve

1992 ◽  
Vol 66 (2) ◽  
pp. 206-210 ◽  
Author(s):  
Louis Liljedahl
Keyword(s):  
Water Movement ◽  
Morphological Characteristics ◽  
Adductor Muscle ◽  
Suspension Feeder ◽  
Type Material ◽  
Suspension Feeding ◽  
Muscle Scar ◽  
Chemoautotrophic Bacteria

The type material of Ilionia prisca (Hisinger) is redescribed. This species shows several basic morphological characteristics typical of Recent Lucinacea, including an anteriorly expanded shell with conspicuous diagonal sulci, a hypertrophied anterior adductor muscle scar, and a nonsinuate pallial line. It is believed to have been a suspension feeder provided with a posterior exhalant siphon and capable of forming an anterior inhalant mucus tube in the sediment. Ilionia prisca lived in a habitat unfavorable for most other bivalves, deeply buried in a soft, oxygen-poor and sulphur-rich mud, in which it oriented itself obliquely against the direction of water movement. Probably it lived in symbiosis with chemoautotrophic bacteria. It is suggested that Ilionia prisca is the oldest known deep-burrowing suspension-feeding bivalve.

Sign in / Sign up

Export Citation Format

Share Document