A new species of Opuntia (Cactaceae) from Coniferous and Quercus Forest of northern Mexico

Bradleya ◽  
2018 ◽  
Vol 36 (36) ◽  
pp. 25-32
Author(s):  
Leia Scheinvar ◽  
Gabriel Olalde-Parra ◽  
Clemente Gallegos-Vazquez ◽  
Jesus Morales-Sandoval
Keyword(s):  
New Species ◽  
Northern Mexico ◽  
A New Species ◽  
Quercus Forest

scholarly journals A new species of Metacyclops Kiefer, 1927 (Copepoda, Cyclopidae, Cyclopinae) from the Chihuahuan desert, northern Mexico

ZooKeys ◽  
2013 ◽  
Vol 287 ◽  
pp. 1-18 ◽  
Author(s):  
Nancy Mercado-Salas ◽  
Eduardo Suarez-Morales ◽  
Alejandro Maeda-Martínez ◽  
Marcelo Silva-Briano
Keyword(s):  
New Species ◽  
Chihuahuan Desert ◽  
Northern Mexico ◽  
A New Species

scholarly journals Chiococca grandiflora (Rubiaceae), a new species from Northern Mexico

PhytoKeys ◽  
2018 ◽  
Vol 98 ◽  
pp. 73-83 ◽  
Author(s):  
David H. Lorence ◽  
Thomas R. Van Devender ◽  
George M. Ferguson
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Northern Mexico ◽  
Iucn Red List Criteria ◽  
A New Species

The new species Chiococcagrandiflora Lorence & T.Van Devender from Sinaloa and Sonora, Mexico differs from its congeners by its larger, showy white flowers in compact cymes of 3–9, and infundibuliform corollas 16–20 mm long with tubes 13–17 mm long and lobes 3–3.5 mm long. Its distribution, habitat, and relationships are outlined. The conservation status for this species is estimated to be Endangered (EN) based on IUCN Red List Criteria.

A New Species of the Freshwater Cladoceran Genus Scapholeberis Schoedler, 1858 (Cladocera: Anomopoda) from the Semidesert Northern Mexico, Highlighted by DNA Barcoding

Zootaxa ◽  
2009 ◽  
Vol 2236 (1) ◽  
pp. 50-64 ◽  
Author(s):  
PATRICIA QUIROZ-VÁZQUEZ ◽  
MANUEL ELÍAS-GUTIÉRREZ
Keyword(s):  
New Species ◽  
Morphological Analysis ◽  
Mitochondrial Gene ◽  
Distinctive Character ◽  
Desert Region ◽  
Northern Mexico ◽  
Hyaline Membrane ◽  
Morphological Differences ◽  
A New Species ◽  
Trunk Limb

Sequencing of the CO1 mitochondrial gene (barcoding) highlighted a possible different species in the semi-desert region of Mexico. After a detailed morphological analysis we describe Scapholeberis duranguensis n. sp. (Cladocera: Anomopoda: Daphniidae). Specimens from the type locality, El Chupadero, Durango, were compared with specimens of S. armata armata Herrick, 1882 and S. armata freyi Dumont and Pensaert, 1983 from Canada and southeastern, central and northern Mexico. The main characters that differentiate the new species are: (1) a thicker denticulate membrane with a conspicuous underlying hyaline membrane at the posterior rim of the valves, (2) fewer setae in the gnathobase of trunk limb II and (3) longer and more rectilinear ejector hooks in trunk limb I. The presence of a pore-like structure at the top of the head was also observed, however we are not certain whether this can be considered as a distinctive character, as it was not consistent in all SEM scanned organisms. The denticulate membrane, the number of setae in the gnathobase of trunk limb II and the length of the ejector hooks are characters shared with other species, however, the combination of them and in particular the structure and thickness of the double membrane at the posterior rim of the valves lead us to conclude that S. duranguensis is a species different from S. armata and from other members of this genus. The CO1 sequences of S. armata freyi and S. duranguensis n. sp. showed a mean divergence of 12.02%, thus supporting the morphological differences between them. Finally, a comparison of the CO1 sequences of Scapholeberis duranguensis n.sp. with other Scapholeberinae available in GenBank supported our results.

A New Species of Gibasis (Commelinaceae) from Northern Mexico

1972 ◽  
Vol 99 (5) ◽  
pp. 243 ◽  
Author(s):  
James L. Reveal ◽  
William J. Hess
Keyword(s):  
New Species ◽  
Northern Mexico ◽  
A New Species

scholarly journals A new species of Vernonia (Asteraceae, Vernonieae) from the state of Oaxaca, Mexico

Phytotaxa ◽  
2016 ◽  
Vol 282 (3) ◽  
pp. 211
Author(s):  
ROSARIO REDONDA-MARTÍNEZ ◽  
JOSÉ LUIS VILLASEÑOR ◽  
ALVARO CAMPOS-VILLANUEVA
Keyword(s):  
New Species ◽  
Cloud Forest ◽  
The State ◽  
Mexican Species ◽  
A New Species ◽  
Quercus Forest

A new species of Vernonia (Asteraceae, Vernonieae) is described from mountain cloud forest, Pinus forest and Pinus–Quercus forest in the State of Oaxaca, Mexico. Typical characters of this species are the lax corymbiform inflorescences, formed by 3–10 heads on peduncles > 4.5 cm long, and the lanceolate or elliptic-ovate shape of leaves. A key to the Mexican species of Vernonia is included.

scholarly journals A new species of the live-bearing fish genus Poeciliopsis from northern Mexico (Cyprinodontiformes, Poeciliidae)

ZooKeys ◽  
2019 ◽  
Vol 883 ◽  
pp. 91-118
Author(s):  
Kevin W. Conway ◽  
Mariana Mateos ◽  
Robert C. Vrijenhoek
Keyword(s):  
New Species ◽  
Water Demand ◽  
Species Group ◽  
Desert Environment ◽  
Northern Mexico ◽  
A New Species

Poeciliopsis jackschultzisp. nov., is described based on seven specimens (17.9–26.7 mm SL) from the Río Concepción (also known as Río Magdalena), Sonora, Mexico. The new species belongs to the Leptorhaphis species group and can be distinguished from other members of this group by features of the skeleton and colouration. The new species is sympatric with P. occidentalis, a hybridogenetic all-female biotype P. monacha-occidentalis, and hybrids between P. monacha-occidentalis females and P. jackschultzi males. The distribution of P. jackschultzi is highly restricted, and the main habitat, spring-fed marshy streams and pools, is susceptible to loss and degradation in a desert environment with increasing human water demand.

Morphological and molecular data on a new species of Plagiorhynchus Lühe, 1911 (Acanthocephala: Plagiorhynchidae) from the long-billed curlew (Numenius americanus) from northern Mexico

2019 ◽  
Vol 94 ◽  
Author(s):  
M. García-Varela ◽  
J.-K. Park ◽  
J.S. Hernández-Orts ◽  
C.D. Pinacho-Pinacho
Keyword(s):  
New Species ◽  
Marine Mammals ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Molecular Data ◽  
Small Subunit ◽  
Nuclear Ribosomal Dna ◽  
Northern Mexico ◽  
Numenius Americanus ◽  
A New Species

Abstract A new species of the genus Plagiorhynchus Lühe, 1911 from the intestine of the long-billed curlew (Numenius americanus) from northern Mexico is described. Plagiorhynchus (Plagiorhynchus) aznari n. sp. is morphologically distinguished from other congeneric species from the Americas by having a trunk expanded anteriorly and a cylindrical proboscis, armed with 19 longitudinal rows of hooks, with 14–15 hooks each row. Nearly complete sequences of the small subunit and large subunit of the nuclear ribosomal DNA of the new species were determined and compared with available sequences from GenBank. Phylogenetic analyses inferred from the two molecular markers consistently showed that P. (Plagiorhynchus) aznari n. sp. is closely related to P. (Plagiorhynchus) allisonae, and this clade is sister to a clade formed by P. (Prosthorhynchus) transversus and P. (Prosthorhynchus) cylindraceus from Plagiorhynchidae. The new species represents the second record of the genus in Mexico and the fourth species in the Americas. The phylogenetic relationships among the members of the order Polymorphida in this study provide significant insights into the evolution of ecological associations between parasites and their definitive hosts. Our analyses suggest that the colonization of marine mammals, fish-eating birds and waterfowl in Polymorphidae might have occurred independently, from a common ancestor of Centrorhynchidae and Plagiorhynchidae that colonized terrestrial birds and mammals.

Morphological and molecular evidence reveals a new species of Lyperosomum Looss, 1899 (Digenea: Dicrocoeliidae) from Melanerpes aurifrons (Wagler, 1829) from northern Mexico

2020 ◽  
Vol 94 ◽  
Author(s):  
M.T. González-García ◽  
M.P. Ortega-Olivares ◽  
L. Andrade-Gómez ◽  
M. García-Varela
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Nuclear Ribosomal Dna ◽  
Bootstrap Support ◽  
Molecular Evidence ◽  
Congeneric Species ◽  
Northern Mexico ◽  
A New Species ◽  
Cox 1

Abstract A new species of the genus Lyperosomum Looss, 1899, from the intestine of the golden-fronted woodpecker (Melanerpes aurifrons) from northern Mexico is described. Lyperosomum cuauhxinqui sp. n. is morphologically distinguished from other congeneric species from the Americas by a higher oral/ventral sucker ratio and its body length and width. The sequences of domains D1–D3 of the large subunit (LSU) of nuclear ribosomal DNA and cytochrome c oxidase subunit 1 (cox 1) from the mitochondrial DNA of the new species were obtained and compared with available sequences from GenBank. The genetic divergence estimated between the new species and other congeneric species ranged from 2 to 6% and 13.4 to 17.3% for LSU and cox 1, respectively. Phylogenetic analyses based on the two (LSU and cox 1) molecular markers consistently showed that L. cuauhxinqui sp. n. was nested within the genus Lyperosomum, with strong bootstrap support (100%) and Bayesian posterior probabilities (1.0). In particular, the LSU tree indicated that the sequence of the new species is closely related to sequences from Zonorchis alveyi, Zonorchis delectans and Zonorchis sp. from Central America, suggesting that these sequences should be transferred to the genus Lyperosomum. The new species represents the first record from Mexico and the fifth species identified in the Americas. Our study also revealed that the taxonomy of the genus Lyperosomum should be re-examined by combining molecular, morphological and ecological characteristics.

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