New information on a juvenile sauropod specimen from the Morrison Formation and the reassessment of its systematic position

Macelognathus vagans was described by O.C. Marsh in 1884, based on a mandibular symphysis from the Upper Jurassic Morrison Formation of Wyoming. Often considered a dinosaur but later tentatively referred to the Crocodylia, its phylogenetic identity has until now been enigmatic. New material of this species from the Morrison Formation of western Colorado demonstrates its affinities with basal crocodylomorphs commonly grouped together as the Sphenosuchia, which are characterized by a gracile postcranial skeleton with erect limb posture. Macelognathus shares features with Kayentasuchus from the Lower Jurassic Kayenta Formation of Arizona and Hallopus, which may be from the Morrison Formation of eastern Colorado. The new material constitutes the youngest definitive occurrence of a sphenosuchian, previously known from the Late Triassic to the Middle or Late? Jurassic.

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The diatom genus Oricymba in Vietnam and Laos with description of one new species, and a consideration of its systematic placement

Phytotaxa ◽

10.11646/phytotaxa.227.2.2 ◽

2015 ◽

Vol 227 (2) ◽

pp. 120 ◽

Cited By ~ 8

Author(s):

Maxim Sergeevich Kulikovskiy ◽

Anton Glushchenko ◽

John Patrick Kociolek

Keyword(s):

Electron Microscopy ◽

New Species ◽

Systematic Position ◽

Freshwater Ecosystems ◽

Diatom Flora ◽

New Information ◽

Diatom Genus ◽

One New Species ◽

A New Species ◽

Scanning Electron

Species from the genus Oricymba are studied from freshwater ecosystems of Vietnam and Laos. Three species were found in Vietnam, namely O. japonica, O. subovalis and O. perjaponica comb. nov. The two last species are new taxa for the diatom flora of Vietnam. A new species is described from Laos, O. voronkinae sp. nov., and its morphology is documented with light and scanning electron microscopy. Oricymba voronkinae sp. nov. represents the first documented occurrence of the genus Oricymba in Laos. Our findings provide new information about the morphology and species distribution of the genus Oricymba in Indochina. We discuss the systematic position of Oricymba within the Cymbellales.

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New Information on the Madagascan Middle Jurassic Sauropod Lapparentosaurus madagascariensis

Geosciences ◽

10.3390/geosciences9120498 ◽

2019 ◽

Vol 9 (12) ◽

pp. 498

Author(s):

Miky Lova Tantely Raveloson ◽

Neil D. L. Clark ◽

Armand H. Rasoamiaramana

Keyword(s):

Middle Jurassic ◽

Hind Limb ◽

Axial Skeleton ◽

Systematic Position ◽

Full Description ◽

Neural Spine ◽

Additional Information ◽

New Information ◽

Bone Fragments ◽

The Common

The systematic position of the Middle Jurassic sauropod Lapparentosaurus madagascariensis is not fully understood due to a lack of useful anatomical detail. Despite many new bone fragments from the axial skeleton, post-cranial skeleton, and a hind limb having been previously unearthed, its systematic position has not yet been satisfactorily established. Although this Malagasy taxon is only recognised by two autapomorphies located in the scapula and coracoid, two features of the neural spine, which are reported here, provide additional information on the common autapomorphies shared with the British genus Cetiosaurus. A full description of the femur and neural spine helps to determine some aspects of its relationship to other similar taxa. Remains of Lapparentosaurus madagascariensis have been recovered from mixed facies that may have been deposited in a shallow water lagoon during a transgressive period in the Isallo IIIb subunit in the Majunga Basin.

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Observations on Hypotrichous Ciliates: The Genera Stichotricha and Chaetospira

Journal of Cell Science ◽

10.1242/jcs.s3-90.10.141 ◽

1949 ◽

Vol s3-90 (10) ◽

pp. 141-158

Author(s):

JOAN FROUD

Keyword(s):

Plant Cell ◽

Asexual Reproduction ◽

Systematic Position ◽

New Information ◽

First Time

1. The structure, behaviour, and asexual reproduction of a plant-cell-inhabiting hypotrichous ciliate are described. 2. The systematic position of the ciliate is discussed and it is placed in the genus Stichotricha Perty as S. intermedia n.sp. 3. New information concerning behaviour, nuclear apparatus, and asexual reproduction is given for the loricate Chaetospira mülleri Lachmann. Cysts are described for the first time.

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New information on the geographical distribution of Piscicola brylinskae Bielecki, 2001 (Hirudinea: Piscicolidae) in Poland and remarks on its systematic position

Biologia ◽

10.2478/s11756-011-0071-9 ◽

2011 ◽

Vol 66 (4) ◽

Cited By ~ 3

Author(s):

Aleksander Bielecki ◽

Katarzyna Palińska ◽

Joanna Cichocka ◽

Ron Beenen ◽

Iwona Jeleń ◽

...

Keyword(s):

The Netherlands ◽

Geographical Distribution ◽

Systematic Position ◽

Individual Species ◽

New Information ◽

First Time ◽

The Village

AbstractFor the first time, Piscicola brylinskae was described from Lake Vechten in the village of Bunnik, near Utrecht — The Netherlands. Until now, P. brylinskae has been found in Poland in Lake Maróz and in the Łyna River near Olsztyn (the northern part of Warmian-Masurian voivodeship). Thanks to proper conservation the coloration of P. brylinskae was described for the first time. Applying 32 indexes resulted that P. brylinskae clustered to Caspiobdella fadejewi. Analysis based on 113 non-metric characteristics has shown that P. brylinskae is most similar to Piscicola margaritae. Though, P. brylinskae do not form with P. margaritae dichotomic branching nor with any other species from this cluster, it could confirm that it is an individual species of the Piscicola genus.

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The Anatomy of Liga brevis (von Linstow, 1884) Dubinina, 1953, a Cyclophyllidean Tapeworm from the Golden-plover, Plnvialis apricaria (L.) and Some Discussion on the Genus Liga Weinland, 1857

Journal of Helminthology ◽

10.1017/s0022149x00022501 ◽

1962 ◽

Vol 36 (1-2) ◽

pp. 215-236

Author(s):

I. C. Williams

Keyword(s):

Nervous System ◽

Reproductive System ◽

Morphological Characters ◽

Systematic Position ◽

Ecological Features ◽

New Information ◽

Relationship Of ◽

First Time ◽

The Relationship ◽

Golden Plover

Liga brevis (von Linstow, 1884) Dubinina, 1953, is recorded for the first time in the British Isles.Detailed descriptions are given of the external features, integument and musculature, excretory system, nervous system and reproductive system of Liga brevis.The relationship of Liga brevis to other species of the genus Liga Weinland, 1857, settstt Ransom, 1909, is discussed and new information on the relationship of the genital ducts to the longitudinal excretory vessels in Liga facile (Meggitt, 1927) Szpotańiska, 1931, is given. The systematic position of Liga brevicollis (Fuhrmann, 1907) Sandeman, 1959, is discussed. The value of some of the morphological characters used to differentiate the species of Liga is discussed.A table showing the more important morphological and ecological features of thirteen species ascribed to Liga Weinland, 1857, sensu Ransom, 1909, is given.

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REOPENING THE MOTHER'S DAY QUARRY (JURASSIC MORRISON FORMATION, MONTANA) IS YIELDING NEW INFORMATION

10.1130/abs/2019am-333256 ◽

2019 ◽

Author(s):

Jason P. Schein ◽

◽

Jason C. Poole ◽

Richard W. Schmidt ◽

Laura Rooney

Keyword(s):

Morrison Formation ◽

New Information ◽

Mother’S Day

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Nematode Parasites of Vertebrates in the Philadelphia Zoological Garden and Vicinity

Parasitology ◽

10.1017/s0031182000022794 ◽

1929 ◽

Vol 21 (1-2) ◽

pp. 63-102 ◽

Cited By ~ 28

Author(s):

William P. N. Canavan

Keyword(s):

New Species ◽

Brook Trout ◽

Wide Distribution ◽

Systematic Position ◽

New Host ◽

Nematode Parasites ◽

New Information ◽

New Localities ◽

Host Parasite ◽

Taxonomic Relations

The Helminths herein reported are of importance because of their economic and taxonomic relations. To point this out, it is only necessary to mention Haemonchus, whose relation to the Bovidae and Ovidae is equivalent to those of Necator and Ancylostoma to the human host.Some are well-known roundworms having a world-wide distribution as parasites of animals, and are listed only on account of locality and museum interest; others, especially certain rare forms from uncommon hosts, are of greater interest and are discussed more fully. Certain details, at one time thought not.to be necessary and hence neglected are added because to-day they are indispensable for specific designation.Because of the abundance of material, it has been possible to supplement accounts given by other authors and to correct some errors due, no doubt, to poor or too few specimens. Several changes in systematic position of known forms and confirmation of others are made.A new name (D. histrix) is proposed for Dirofilaria subcutanea (Linstow, 1899) Boulenger, 1920. Eustrongylides larvae, of Ciurea, J. 1924, are included under the pre-adult stage of a new species (Eustrongylides wenrichi) because both are alike and their characters fit no other known species. New information is added about Trypanoxyuris trypanuris Vevers, 1923, and Cyrnea coloni Cram, 1927, amending their descriptions.Descriptions and illustrations of seven new species in as many genera are given. They are Acuaria (Dispharynx) resticula from a groove-billed ani, Ascaridia petrensa from a partridge, Dirofilaria spinosa from a porcupine, Physaloptera multiuteri from a monkey, Subulura pennula from a quail, Spironoura procera from a terrapin, and the above-mentioned pre-adult Eustrongylides wenrichi from a stream pike, brook-trout, calico bass, sunfish, and a frog.In all there are 162 determinations in 38 genera and 56 species, including new ones, from 150 hosts involving 117 different host species.Superparasitism and significant cases of parasitism are pointed out because they are of interest to one concerned with incidence and degree of infestation. Numerous records of new host-parasite relations and new localities will be of interest to students of distribution.

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