Tooth structure and buccal pores in the chaetognath Flaccisagitta hexaptera and their relation to the capture of fish larvae and copepods

1987 ◽  
Vol 65 (1) ◽  
pp. 181-187 ◽  
Author(s):  
Erik V. Thuesen ◽  
Robert Bieri
Keyword(s):  
Larval Fish ◽  
Fish Larvae ◽  
Scanning Electron Micrographs ◽  
Posterior Teeth ◽  
Tooth Structure ◽  
Anterior Teeth ◽  
New Type ◽  
First Time ◽  
Chemosensory Function ◽  
Scanning Electron

The teeth of Flaccisagitta hexaptera are capable of penetrating the exoskeleton of copepods. The grasping spines, anterior, and posterior teeth are all capable of piercing the epidermis of larval fish as seen in a series of scanning electron micrographs. A new type of anterior tooth structure is observed. A chemosensory function is suggested for a new set of pores found between the sets of anterior teeth. The secretory nature of the vestibular pit is clearly seen for the first time.

Minimally Invasive Adhesive Rehabilitation for a Patient With Tooth Erosion: Seven-year Follow-up

2019 ◽  
Vol 44 (1) ◽  
pp. E45-E57
Author(s):  
NI Pavesi Pini ◽  
LM De Marchi ◽  
AL Ramos ◽  
RC Pascotto
Keyword(s):  
Composite Resin ◽  
Tooth Wear ◽  
Restorative Dentistry ◽  
Posterior Teeth ◽  
Main Complaint ◽  
Anterior Teeth ◽  
Prevention And Treatment ◽  
Orthodontic Device ◽  
Scanning Electron

SUMMARY Tooth wear is a multifactorial condition of growing concern. In clinical practice, it is often a challenge for prevention and treatment since many etiological factors may be involved. This case report describes an esthetic rehabilitation of a young patient presenting tooth wear due to erosion. The etiological factor of this case was the patient sucking on lemons, an acidic fruit. The main complaint of the patient was the appearance of short maxillary incisors. The treatment involved orthodontic and restorative dentistry techniques. First of all, an orthodontic device was used to increase the vertical dimension of occlusion and create an adequate space for the direct restorations. The posterior teeth were restored with two direct composite resin techniques; the anterior teeth were then restored using a balanced occlusion. The seven-year follow-up of the case is presented. Replicas of the restorations were made and visualized under scanning electron microscopy up to the 12-month evaluation. In the clinical follow-up at seven years, maintenance of the results and restorations can be clearly seen.

Two remarkable new Riccia (Marchantiales, Ricciaceae) records for the bryophyte flora of Cape Verde Islands, an important biogeographical refuge area

2019 ◽  
Vol 41 (2) ◽  
pp. 71-76
Author(s):  
CECILIA SERGIO ◽  
IRENEIA MELO
Keyword(s):  
Electron Micrographs ◽  
Habitat Preferences ◽  
Cape Verde ◽  
Scanning Electron Micrographs ◽  
Cape Verde Islands ◽  
Refuge Area ◽  
First Time ◽  
Scanning Electron

Recent progresses of knowledge on Riccia diversity in Cape Verde islands are briefly surveyed. The occurrence of two remarkable Riccia species in this archipelago is examined, and their overall distribution is presented.                Riccia atropurpurea Sim and R. congoana Steph. are noteworthy liverwort species, here reported for the first time for Cape Verde islands, from specimens collected in Fogo island. Main diagnosing characters and those of related taxa, habitat preferences, illustrations, scanning electron micrographs and updated ranges of the species are presented.

Valdensiniaheterodoxa (Sclerotiniaceae) in the United States

1994 ◽  
Vol 24 (9) ◽  
pp. 1981-1983 ◽  
Author(s):  
Lorelei L. Norvell ◽  
Scott A. Redhead
Keyword(s):  
United States ◽  
Electron Micrographs ◽  
Leaf Spot ◽  
The United States ◽  
Scanning Electron Micrographs ◽  
First Time ◽  
Scanning Electron

The leaf-spot pathogen Valdensiniaheterodoxa Peyronel is reported for the first time from the United States (Idaho, Washington, and Oregon), based on the recovery of the anamorph. Scanning electron micrographs illustrate anamorphic propagules collected from economically significant ericaceous hosts Gaultheriashallon Pursh, Vacciniumalaskaense Howell, and Vacciniummembranaceum Douglas.

A new record of the genus Calonema, with the new species Calonema gansuence from China

Phytotaxa ◽  
2015 ◽  
Vol 212 (2) ◽  
pp. 169
Author(s):  
Zhang Bo ◽  
YU LI
Keyword(s):  
New Species ◽  
Electron Micrographs ◽  
New Record ◽  
Gansu Province ◽  
Scanning Electron Micrographs ◽  
Qilian Mountain ◽  
First Time ◽  
Scanning Electron

The genus Calonema is recorded from China for the first time as the new species Calonema gansuence, described on the basis of material collected from Qilian Mountain, Gansu Province, China. This new species is characterized by its brick brown sporocarps, relatively thick peridium and spores (about 9–12 μm in diam.) marked with rows of warts. A description, scanning electron micrographs and a key to all of the species in the genus Calonema are provided herein. Holotype specimens are deposited in the Herbarium of the Mycological Institute of Jilin Agricultural University (HMJAU), Changchun, China.

A new species of Craterium (Myxomycetes, Physaraceae) growing on living grass and new records of the genus from China

Phytotaxa ◽  
2020 ◽  
Vol 443 (1) ◽  
pp. 13-18
Author(s):  
BO ZHANG ◽  
HAIXIA MA ◽  
ZHUANG LI ◽  
YU LI ◽  
XIAO LI
Keyword(s):  
New Species ◽  
Nature Reserve ◽  
New Records ◽  
Northeastern China ◽  
Scanning Electron Micrographs ◽  
Fruiting Bodies ◽  
National Nature Reserve ◽  
First Time ◽  
A New Species ◽  
Scanning Electron

A new species of Craterium (C. subpurpurea) collected in the Changbai Mountain National Nature Reserve, Jilin Province, northeastern China, is described. The fruiting bodies of C. subpurpurea are long cylindrical with distinct ridges, with large spinulose spores (8–10 μm diam.) as well as a persistent purplish pale peridium at the base of the sporotheca. A newly described species, C. aureonuleatum, has been documented in China for the first time, based on material collected from the Shennongjia National Nature Reserve, Hubei Province and the Gexigou National Nature Reserve, Sichuan Province. Craterium aureonuleatum is characterized by a yellowish pseudocolumella at the apex of the sporocarp and a persistent cup-like peridium when mature. Descriptions and scanning electron micrographs for these members of the genus Craterium are provided.

New position of an abdominal defensive gland complex in Staphylinidae (Coleoptera) with redescription of Piestus heterocephalus Fauvel, 1902 (Piestinae)

Zootaxa ◽  
2008 ◽  
Vol 1895 (1) ◽  
pp. 1-9 ◽  
Author(s):  
EDILSON CARON ◽  
CIBELE S. RIBEIRO-COSTA ◽  
ALFRED F. NEWTON
Keyword(s):  
Electron Micrographs ◽  
Scanning Electron Micrographs ◽  
Preliminary Survey ◽  
Rove Beetle ◽  
First Time ◽  
Abdominal Defensive Gland ◽  
Scanning Electron

A Neotropical rove beetle, Piestus heterocephalus Fauvel, 1902 (Coleoptera, Staphylinidae, Piestinae), is redescribed and illustrated. Its abdominal defensive gland complex is described using drawings, photos and scanning electron micrographs. This complex is reported for the first time in Piestinae and its distinctive position is unique in Staphylinidae. Our preliminary survey suggests that the presence of this gland complex is restricted to part or all of the genus Piestus Gravenhorst, 1806.

Revision of the American Pill Millipedes I: Onomeris and Trichomeris (Diplopoda, Glomerida, Glomeridae)

Zootaxa ◽  
2019 ◽  
Vol 2725 (1) ◽  
pp. 28 ◽  
Author(s):  
THOMAS WESENER
Keyword(s):  
United States ◽  
North Carolina ◽  
Electron Micrographs ◽  
Distribution Data ◽  
Scanning Electron Micrographs ◽  
Eastern United States ◽  
Mountainous Areas ◽  
Cumberland Plateau ◽  
First Time ◽  
Scanning Electron

The unique characters which distinguish Trichomeris Loomis, 1943 from Onomeris Cook, 1896 are based on erroneous drawings and not actual differences. Trichomeris is a junior synonym of Onomeris. All three species of Onomeris, O. sinuata (Loomis), 1943, O. underwoodi Cook, 1896 and O. australora Hoffman, 1950 are redescribed, based on their holotypes, as well as additional specimens. Scanning electron micrographs are presented for the first time for an American member of the order Glomerida. A key to the three species of Onomeris is provided. The available distribution data for Onomeris is still rudimentary, but the distribution areas of the three species are Cumberland Plateau from NW Alabama to Virginia for O. sinuata n. comb., lowland areas from Mississippi to Georgia for O. underwoodi, mountainous areas of Tennessee, Georgia and North Carolina for O. australora. Additional Onomeris species can potentially be discovered in the eastern United States.

The microstructure of the dentition and dermal ornament of three dipnoans from the Devonian of Western Australia: a contribution towards dipnoan interrelations, and morphogenesis, growth and adaption of the skeletal tissues

1977 ◽  
Vol 281 (979) ◽  
pp. 29-72 ◽  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Anterior Part ◽  
Polarized Light ◽  
Scanning Electron Micrographs ◽  
Dental Tissues ◽  
Functional Surfaces ◽  
Current Usage ◽  
First Time ◽  
Scanning Electron

Detailed descriptions of the microstructure, which includes both histology and ultrastructure, are given for each type of tissue in each of the three species of Australian dipnoan. Most of the tissues have not previously been recorded in this way even for other species within the same genera. The microstructure is interpreted from examination of ground sections in transmitted and polarized light, together with examination of functional, forming and fracture surfaces in the scanning electron microscope. No previous studies of dipnoan dental tissues have been published in which the histology is related to surface morphology as seen in the scanning electron microscope. The histology, microstructure, growth and distribution of buccal denticles are described in Griphognathus whitei and Holodipterus gogoensis , and their morphogenesis and adaptation to function is discussed. It is concluded that the phyletic trend towards macromerism, as shown in chondricthyans and primitive teleostomes, is illustrated in the three species of dipnoan. The continuous layer of dentine of the tooth ridges, lips and covering to the dermal snout is described and found to be similar in the three species and equivalent to the tissue described previously in other dipnoans, sometimes as a form of cosmine. A term not in current usage is suggested for this dentine, namely syndentine. Dentine terminology is reviewed and the relevance to dipnoan dental tissues is discussed with the conclusion that an older term should be reintroduced to eliminate the current anomalies in terminology. Chirodipterus australis is the only species with typical tooth plates. The histology is compared with previous accounts of tooth plates in dipnoans and found to have some similarity with those of Neoceratodus forsteri . The microstructure is reported from examination of the worn functional surfaces and acid-etched functional surfaces with the scanning electron microscope, this information has not previously been reported for dipnoan tooth plates and is presented here as a basis for comparison with other species. New features of cosmine structure are described from scanning electron micrographs of the surfaces and these are related to the probable mode of formation and the involvement of the epithelial cells. The structure is found to compare in some ways with the cosmine of osteolepids. The loss of cosmine and replacement by tubercles in Griphognathus whitei and Holodipterus gogoensis is explained as retention of an ontogenetic potential which is comparable with Ørvig’s theory of cosmine regression in the porolepids. Superpositional growth in the dermal skull bones is described for the first time in dipnoans. It is postulated that the ancestors of dipnoans had superimposed denticles beneath a cosmine covering. The information obtained from the microstructure is used to examine the hypothesis proposed by Miles (1977) in a paper on the phyletic relations within the dipnoans. This confirms that Griphognathus white i has retained a primitive dentition with separate buccal denticles and tooth ridges; Holodipterus gogoensis has retained these features, denticles and lip ridges, together with an advanced feature of tooth cusps which are a divergent specialization phyletically preceding tooth plates; Chirodipterus australis has not retained buccal denticles but has lip ridges on the snout and anterior part of the lower jaw, and the specialized tooth plates. Pleromic dentine is recorded in two of these species and discussed with other observed methods of adaptation to wear.

Three new species of genus Cenocorixa (Hemiptera: Heteroptera: Corixidae: Corixinae) from China

Zootaxa ◽  
2010 ◽  
Vol 2350 (1) ◽  
pp. 35
Author(s):  
SHUZHI REN ◽  
WEIBING ZHU
Keyword(s):  
New Species ◽  
Electron Micrographs ◽  
Scanning Electron Micrographs ◽  
Three New Species ◽  
First Time ◽  
Scanning Electron

The genus Cenocorixa is recorded for the first time in China. Three new species Cenocorixa bui, Cenocorixa crestiforma, and Cenocorixa montana from China are described and illustrated. Some characters are illustrated by drawings and scanning electron micrographs.

A review of the Diplazontinae of Mongolia (Hymenoptera: Ichneumonidae)

Zootaxa ◽  
2011 ◽  
Vol 2790 (1) ◽  
pp. 35 ◽  
Author(s):  
SERAINA KLOPFSTEIN
Keyword(s):  
New Species ◽  
Natural History ◽  
Electron Micrographs ◽  
Scanning Electron Micrographs ◽  
Large Variability ◽  
History Museum ◽  
Hungarian Natural History Museum ◽  
First Time ◽  
A New Species ◽  
Scanning Electron

The Diplazontinae identified and described by Setsuya Momoi in the collection of Dr. Kaszab from Mongolia were examined at the Hungarian Natural History Museum in Budapest. Because of insufficient labelling, the type status of some specimens had to be clarified and four lectotypes were designated. Syrphophilus stibarus Momoi,1973 is conspecific with Syrphophilus dilleriator Aubert, 1976, syn. nov., and Syrphoctonus lipothrix (Momoi, 1973) is a junior synonym of Syrphoctonus haemorrhoidalis (Szépligeti, 1898), syn. nov. Diplazon multicolor (Gravenhorst, 1829) is removed from synonymy with Diplazon annulatus (Gravenhorst, 1829), stat. rev. A new species is described, Sussaba mongolica sp. nov., and the male of Syrphoctonus venustus (Dasch, 1964) is re-described to account for the material from Mongolia. The ultrastructure of the tyloids of three species is illustrated by scanning electron micrographs to demonstrate their large variability in the subfamily. Seven species are recorded for the first time from Mongolia, four of which are recorded for the first time from the Eastern Palaearctic. These data on the Mongolian diplazontines provide further evidence for an unusually large proportion of species of this subfamily with a multiregional distribution.

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