Characterization of a mycoplasma isolated from infectious bovine keratoconjunctivitis: M. bovoculi sp. nov.

1973 ◽  
Vol 19 (11) ◽  
pp. 1435-1444 ◽  
Author(s):  
E. V. Langford ◽  
R. H. Leach
Keyword(s):  
New Species ◽  
Potential Significance ◽  
Infectious Bovine Keratoconjunctivitis ◽  
Taxonomic Description ◽  
A New Species

Two strains representative of numerous mycoplasmas isolated from the eyes of cattle with infectious bovine keratoconjunctivitis (IBK) have been characterized. On the basis of their cultural, morphological, biological, and serological properties, these and other antigenically similar strains have been classified as belonging to a new species of Mycoplasmatales for which the name Mycoplasma bovoculi has been proposed. A taxonomic description of the new species is provided. The potential significance of M. bovoculi in the etiology of IBK is currently being investigated.

Three simultaneous and independent approaches to the characterization of a new species of Labeo (Teleostei, Cyprinidae) from West Africa

1990 ◽  
Vol 68 (6) ◽  
pp. 1124-1131 ◽  
Author(s):  
D. Paugy ◽  
J.-F. Guégan ◽  
J.-F. Agnèse
Keyword(s):  
New Species ◽  
Sympatric Species ◽  
Alternative Possibility ◽  
Taxonomic Description ◽  
Niger River ◽  
Gill Raker ◽  
A New Species ◽  
Nei's Genetic Distance ◽  
Genetic Result

A new species of Labeo (Cuvier, 1817) is defined and described from the Upper Niger River and Upper Senegal (Baoulé) River basins. Although it is diagnosed as a new species, there is some overlap with two other sympatric species, L. coubie and L. senegalensis, in identifying characters. This overlap is sufficient to introduce the alternative possibility that the putative new species is a hybrid. Three separate techniques were used to test the two competing hypotheses: morphological/morphometric analysis, chromosomal/enzymological analysis, and comparative parasitology. These complementary studies were carried out simultaneously but essentially independently, to minimize any scientific bias during the investigation. It was established that the three species can be distinguished by a combination of mouth morphology and meristics (notably gill raker counts). Though all three have the same chromosome number (2N = 50), the new species can be identified allelically by four homozygous loci that are not present in L. coubie and L. senegalensis. This genetic result indicates that the new species is sexually isolated from the other two. Also, calculations of Nei's genetic distance produce an index which is shorter between L. coubie and L. senegalensis than between either of these two and the prospective new species. All three species can be further separated by their specific monogenean gill-parasite complement: L. coubie (five Dogielius spp., seven Dactylogyrus spp.); L. senegalensis (two Dogielius spp., five Dactylogyrus spp.); Labeo roseopunctatus n.sp (1 Dogielius sp., one Dactylogyrus sp.). As a result of these investigations, the idea of hybridism is rejected and a formal taxonomic description of Labeo roseopunctatus n.sp. is included in this paper.

Ultrastructural and molecular characterization of Bacillidium vesiculoformis n. sp. (Microspora: Mrazekiidae) in the freshwater oligochaete Nais simplex (Oligochaeta: Naididae)

Parasitology ◽  
2004 ◽  
Vol 130 (1) ◽  
pp. 31-40 ◽  
Author(s):  
D. J. MORRIS ◽  
R. S. TERRY ◽  
K. B. FERGUSON ◽  
J. E. SMITH ◽  
A. ADAMS
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Infected Cell ◽  
Host Cell ◽  
Developmental Stages ◽  
Parasite Development ◽  
Adhesive Quality ◽  
Transmission Studies ◽  
A New Species

The development of a new species, Bacillidium vesiculoformis n. sp. (Microspora, Mrazekiidae), is described from the freshwater oligochaete Nais simplex (Oligochaeta, Naididae). Initial stages of parasite development consist of a monokaryotic merogony within a haemocyte of the intestinal blood sinus. The resulting hypertrophied haemocyte is attached to the chloragocytes of the sinus by fine cytoplasmic extensions with the sinus around the cell becoming greatly enlarged. The meronts within the haemocyte form diplokaryotic sporonts that undergo sporogenesis directly within the cytoplasm of the host cell. The infected cell becomes packed with spores and developmental stages, causing it dramatically to increase in size, eventually rupturing the oligochaete and cell. Sporogony appears to be disporoblastic. Released spores were observed to have an adhesive quality. Transmission studies conducted with mature spores failed to transmit the parasite horizontally although vertical transmission was observed. Phylogenetic analysis of the parasite demonstrated that B. vesiculoformis clustered with microsporidian parasites of bryozoa and two other microsporidians, Janacekia debaiseuxi and an unidentified Bacillidium sp.

Description of Diploplastron dehorityi sp. nov. (Entodiniomorphida, Ophryoscolecidae), a new rumen ciliate from Brazilian sheep (Ovis aries)

Zootaxa ◽  
2017 ◽  
Vol 4258 (6) ◽  
pp. 581 ◽  
Author(s):  
FRANCIANE CEDROLA ◽  
ROBERTO JÚNIO PEDROSO DIAS ◽  
ISABEL MARTINELE ◽  
MARTA D’AGOSTO
Keyword(s):  
New Species ◽  
Body Shape ◽  
The Body ◽  
Ovis Aries ◽  
Domestic Sheep ◽  
Diagnostic Features ◽  
Ciliate Community ◽  
The Right ◽  
A New Species

To date the genus Diploplastron comprised only one species of ophryoscolecid ciliate, Diploplastron affine, which is characterized by having two retractable ciliary zones in the anterior end of the body, two slender and juxtaposed skeletal plates on the right side, a rod shape macronucleus, and two contractile vacuoles. During study on the characterization of rumen ciliate community composition in Brazilian domestic sheep, we observed ciliates with atypical morphology but with diagnostic features of genus Diploplastron. This study describes Diploplastron dehorityi, a new species of ophryoscolecid ciliate, that differs from D. affine, primarily, in the morphology of skeletal plates, morphology of nuclear apparatus and body shape. In addition to the similarities between the new species and congener species, D. dehorityi has some morphological similarities to species of genus Eremoplastron.

Morphology and molecular phylogeny of ornamental freshwater prawns of the genus Macrobrachium (Decapoda, Caridea, Palaemonidae) from China with the description of a new species

Crustaceana ◽  
2021 ◽  
Vol 94 (10) ◽  
pp. 1201-1220
Author(s):  
Qinghua Chen ◽  
Wenjian Chen ◽  
Yuanwei Hu ◽  
Ka Yan Ma ◽  
Zhaoliang Guo
Keyword(s):  
New Species ◽  
Colour Pattern ◽  
Molecular Evidence ◽  
Cytochrome Oxidase Subunit ◽  
Mitochondrial Cytochrome Oxidase Subunit ◽  
Closely Related Species ◽  
Distribution Maps ◽  
Mitochondrial Cytochrome Oxidase ◽  
A New Species

Abstract This study dealt with three species of ornamental palaemonid freshwater prawns of the genus Macrobrachium, based on morphological and molecular analysis. Macrobrachium pentazona He, Gao & Guo, 2009; M. laevis Zheng, Chen & Guo, 2019; and M. bilineare sp. nov. are distinguishable from closely related species by segmental ratios, spination of the second pereiopods and the slender scaphocerite. Macrobrachium bilineare sp. nov. can easily be recognized in the field by its bright colour pattern. Molecular evidence of mitochondrial cytochrome oxidase subunit I (COI), also supports the characterization of this new species, raising the total number of Macrobrachium spp. known from China to 41. Detailed description, illustrations, colour photographs, habitat information, distribution maps and features of conservation significance are also briefly discussed.

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