Dataset Information

Taxonomic updates in Amphitecna (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved A. megalophylla.

ABSTRACT: In this study, we analyzed the morphological affinities of the 24 species of Amphitecna based on detailed morphological studies and multivariate cluster analyses. Our results suggest that the genus Amphitecna includes six morphological groups that can be easily distinguished based on floral and fruits characteristics: A. donnell-smithii group, A. macrophylla group, A. megalophylla group, A. molinae group, A. spathicalyx group, and A. steyermarkii group. A new species from Mexico, Amphitecna fonceti, is described. This new species is clearly differentiated by the predominantly ramiflorous inflorescences bearing multiple flowers per shoot, buds rounded at the apex, large flowers with a transverse fold in the corolla throat, calyx surface pubescent and strongly costate, and fruits elliptic, apiculate at the apex. We discuss the characteristics of each morphological group and their geographical distribution, provide a detailed description of the new species including ethnobotany notes, and propose the re-establishment of the giant-leaved species A. megalophylla.

SUBMITTER: Gomez-Dominguez H

PROVIDER: S-EPMC7851107 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature

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Taxonomic updates in Amphitecna (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved A. megalophylla.

Gómez-Domínguez Héctor H Ortiz-Rodríguez Andrés Ernesto AE Velasco-Espino Delfilia D Hernández-Burguete Rene R

PhytoKeys 20210125

In this study, we analyzed the morphological affinities of the 24 species of Amphitecna based on detailed morphological studies and multivariate cluster analyses. Our results suggest that the genus Amphitecna includes six morphological groups that can be easily distinguished based on floral and fruits characteristics: A. donnell-smithii group, A. macrophylla group, A. megalophylla group, A. molinae group, A. spathicalyx group, and A. steyermark ...[more]

PMID: 33574728

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Project description:Carabus (Cathoplius) aliai was described as a separate species by Escalera in 1944 but since the 1950-60s it has been considered as a subspecies of Carabus (Cathoplius) stenocephalus Lucas, 1866. This downgrading was adopted after examining only a few specimens, due to their rarity in collections. In recent years, an important population of this taxon was rediscovered in the Tan-Tan area in southern Morocco. By combining field observations with laboratory breeding experiments including hybridization trials, and through the morphological examination of a representative number of individuals, it is confirmed that Carabusaliai is indeed a valid species. Despite close geographic distribution, the morphological and biological characteristics of Carabusaliai and Carabusstenocephalusifniensis Zarco, 1941, its northern substitutive taxon, are very different. Carabusaliai adults are characterized by a smaller size, a slender silhouette, a more brilliant aspect, a narrower pronotum, a coarser elytral sculpture, longer legs, and a wider and a little more curved apex of the median lobe of the aedeagus. Carabusaliai larvae are also characterized by a much smaller size and the Carabusaliai pupa has a narrower thoracic area and a different chaetotaxy compared to that of Carabusstenocephalusifniensis. Contrary to this, Carabusaliai has a life cycle belonging to the annual univoltine winter semelparous type. Moreover, the duration of its development cycle is shorter. Carabusaliai is a sabulicolous steppe-wandering species with an intensive running activity, while Carabusstenocephalusifniensis is a more sedentary taxon. Crossbreeding experiments showed a marked reproductive isolation between Carabusaliai and Carabusstenocephalusifniensis. When F1 hybrids were crossed with one another, a very high mortality rate during embryonic, larval and pupal development was evident and no vital F2 neo-adults were obtained. Morphological and biological differences, together with the reproductive failure in Carabusaliai × Carabusstenocephalusifniensis hybrids, clearly indicate that Carabusaliai is a separate Cathoplius species that is distributed in an area south of the Anti-Atlas chain, from Plage Blanche (Guelmim) to Lemsid and Bou Kra (south of Laâyoune). Carabusaliai is therefore both a Saharan desert endemic and an Atlantic resident. Moreover, it is the southernmost Carabus species of the western Palaearctic region.

Dataset Information

Taxonomic updates in Amphitecna (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved A. megalophylla.

Publications

Taxonomic updates in <i>Amphitecna</i> (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved <i>A. megalophylla</i>.

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