Virginia León-Règagnon

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Molecular evidence is interpreted in the light of morphology to examine the validity of several species of Haematoloechus described as Mexican endemics. Internal transcribed spacers 1 and 2 and 28S ribosomal genes were sequenced for 11 isolates. Phylogenetic analysis of separate partitions and combined databases was conducted. Results were analyzed, in the(More)
sporadic serogroup C ET-24 strain. The 16S rRNA gene sequences of 66 N. meningitidis isolates representing serogroups A, B, C, W135, Z, and Y were diverse, with nine different sequences among the NMW135 isolates. Finally , all four recent NMW135 isolates had identical NheI pulsed-field gel electrophoresis (PFGE) patterns distinct from patterns seen in other(More)
Two new species of Parapharyngodon collected from the intestine of the Mexican boulder spiny lizard Sceloporus pyrocephalus are described. This study increases to 49 the number of valid species assigned to Parapharyngodon worldwide, 11 of them distributed in Mexico. Males of the two new species share the presence of four pairs of caudal papillae, an(More)
Tegorhynchus pectinarius Van Cleave, 1940, is redescribed on the basis of male and female specimens in Microlepidotus brevipinnis from the marine waters of Costa Rica and México. The elongate proboscis with a heavy cuticular coating, cuticular body spines, 8 cement glands, and the heavy, strongly recurved hooks in the shape of an inverted apostrophe with(More)
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