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.

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.

Morphological and genetic characterization of a new Armadillidium species (Oniscidea, Armadillidiidae) from Tunisia

Crustaceana ◽  
2018 ◽  
Vol 91 (2) ◽  
pp. 169-183
Author(s):  
S. Hamaied ◽  
F. Charfi-Cheikhrouha ◽  
B. M. Lombardo
Keyword(s):  
New Species ◽  
Genetic Characterization ◽  
Morphological Differentiation ◽  
Morphological Comparison ◽  
Enzymatic Systems ◽  
Northeastern Tunisia ◽  
A New Species ◽  
Semi Arid ◽  
Nei's Genetic Distance

Armadillidium boukorninense n. sp., a new species collected in northeastern Tunisia, is described. This species can be easily recognised by the tegument structure, the morphology of the cephalon and the high differentiation of the male pereopod 7. Its geographical distribution is limited to the northeast of Tunisia, in the maquis and garrigues habitats of sub-humid and semi-arid areas. This new species is morphologically similar to A. decorum. However, the morphological comparison between these two species showed a divergence at the cephalon, hind margin of pereon-epimeron 1, pereopod VII and pleotelson. An allozyme analysis of ten enzymatic systems (ME, PHI, EST, MPI, ACPH, GOT, IDH, PEP, PGM, MDH) confirmed this morphological differentiation. Among the eighteen loci that were analysed, differentiation in six diagnostic (Mpi, Pgm, Me, Acph-2, Pep-3, Got-2) and two partially-diagnostic loci (Idh-1, Phi),were easily recognized. Furthermore, high values of Nei’s genetic distance (Nei, 1978) () and indicated a high genetic differentiation of these two species. When taking into account these two approaches, A. boukorninense n. sp. is morphologically and genetically different from A. decorum.

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.

A new species of Coelosis Hope, 1837 (Coleoptera: Scarabaeidae: Dynastinae: Oryctini) from Paraguay

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
BRETT RATCLIFFE ◽  
RONALD CAVE
Keyword(s):  
New Species ◽  
Sympatric Species ◽  
Distribution Map ◽  
San Pedro ◽  
A New Species

Coelosis spinophallicus Ratcliffe & Cave is described as a new species from Capiíbary, San Pedro Department, Paraguay. The new species is compared with the sympatric species Coelosis inermis (Sternberg). A description, diagnosis, illustrations, and distribution map are provided for the new species, with a key to the Paraguayan species of Coelosis Hope.

scholarly journals Anopheles (Nyssorhynchus) deaneorum: a new species in the albitarsis complex (Diptera: culicidae)

1989 ◽  
Vol 84 (4) ◽  
pp. 535-543 ◽  
Author(s):  
Maria Goreti Rosa-Freitas
Keyword(s):  
New Species ◽  
Genetic Distance ◽  
Adult Female ◽  
Instar Larva ◽  
Fourth Instar ◽  
Type Locality ◽  
Fourth Instar Larva ◽  
External Appearance ◽  
A New Species ◽  
Nei's Genetic Distance

Anopheles (Nyssorhynchus) deaneorum sp. n. is described from specimens collected in Guajará-Mirim, Rondônia state and Rio Branco, Acre state, Brazil, on human and animal baits, inside dwellings and from the progenies of engorged females. A detailed description of the shape of egg, external appearance of adult female and male, genitalias, female cibarial armature and complete chaetotaxy of pupa and larva show that it can be distinguished from Anopheles albitarsis from the type-locality and other areas by the paler general external appearance of the adult, the posterolateral tufts of scales, on the female abdominal terga and the branching of the outer anterior clypeal seta (3-C) of the fourth instar larva (as shown in illustrations). If species can also be distinguished from An. albitarsis from the type locality by the allele frequencies at 11 enzymic loci as represented by Nei's Genetic Distance.

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.

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