Search results for "Systematics"
showing 10 items of 6702 documents
The Taxon Rasivalva (Hymenoptera: Braconidae) in the Palaearctic Region and Description of Rasivalva pyrenaica New Species from Andorra
2005
Rasivalva appears to be an uncommon genus, although it is nearly cosmopolitan with the exception of the Australian continent. Five species have been recorded from Europe and Crimea. In this paper, Rasivalva pyrenaica n. sp. is described as the most southern Palaearctic record of this genus, as well as the first record of the genus from Iberian Peninsula. An identification key is proposed for the Palaearctic species.
The complex nature of progenetic species — examples from Mesozoic ammonites
1991
Several examples of progenetic species among Mesozoic ammonites are investigated. The ammonites are Middle Jurassic kosmoceratids, Upper Jurassic oppeliids, and Upper Cretaceous scaphites. As assessed through outgroup comparison, the progenetic species in each of these examples is characterized by small size at maturity and the presence of morphological features typical of those of the juveniles of more primitive species. However, in none of these examples is the progenetic species a duplicate form of the juvenile stage of more primitive species. There are at least three kinds of features of progenetic species that differ from those of the juveniles of more primitive species: (1) symplesiom…
A revision of Papaver sect. Meconidium
2010
The biennial Papaver L. sect. Meconidium Spach (Papaveraceae) is considered to contain four species: P. libanoticum Boiss. with subspp libanoticum and polychaetum (Schott & Kotschy ex Boiss.) Kadereit comb. et stat. nov., P. armeniacum (L.)DC. with subspp armeniacum, microstigmum (Boiss.) Kadereit comb. et stat. nov. and pilgerianum (Fedde) Kadereit comb. et stat. nov., P. curviscapum Nab., and P. persicum Lindl. with subspp persicum, tauricolum (Boiss.) Kadereit comb. et stat. nov. and microcarpum (Boiss.) Kadereit comb. et stat. nov. A key to species and subspecies is given, capsules and leaves of all taxa are illustrated, and distribution maps are provided.
The genus Pterocephalus (Dipsacaceae) in Morocco
1999
In Morocco the genus Pterocephalus ADANS. (Dipsacaceae) is represented by two species: Pterocephalus depressus COSSON & BALANSA, endemic in the Grand Atlas and Pterocephalus kunkelianus PERIS, ROMO & STUBING sp. nova, endemic in the central part of the Rif mountains. Information on the nomenclature, morphology, ecology and distribution of both taxa in Morocco is given here and original illustrations are also included. In Marokko wird die Gattung Pterocephalus ADANS. (Dipsacaceae) durch zwei Arten vertreten: Pterocephalus depressus COSSON & BALANSA, endemisch im Grosen Atlas, und Pterocephalus kunkelianus PERIS, ROMO & STUBING sp. nova, endemisch im zentralen Rif-Gebirge. Informationen zu No…
<strong>Nomenclatural notes on Fabaceae described from Sicily</strong>
2021
A note about some taxa in Anthyllis and Trifolium (Fabaceae) described from Sicily is presented. Concerning Trifolium, we provide the lectotypification of the name T. pratense var. semipurpureum (≡ T. pratense subsp. semipurpureum), using a specimen preserved at PAL (Todaro’s collection). Concerning the Lojacono-Pojero’s name Vulneraria heterophylla var. parvula, it is lectotypified by a specimen at G. A neotype at NAP is proposed for the Gussone’s name Vulneraria heterophylla var. albiflora. As this latter name is applied to a taxon accepted here at specific rank, a new combination is validated. On the contrary, A. heterophylla var. parvula is considered as a new heterotypic synonym of Ant…
Typification and Taxonomic Characterization ofThymuslongicaulisC. Presl (Lamiaceae)
2014
Thymus longicaulis C. Presl, described from Sicily by Carl Bořivoj Presl, is a critical Mediterranean species, often confused with other taxa belonging to Thymus sect. Serpyllum. In order to preserve the current application of this name, a lectotype is designated. We provide a detailed morphological description and information about its habitat, phenology, distribution and taxonomy.
Typification of <em>Statice dichotoma</em> Cav. (Plumbaginaceae)
2013
A lectotype and an epitype are here designated for Statice dichotoma Cav. (Plumbaginaceae), an endemic taxon from the central part of the Iberian Peninsula, which is currently named Limonium dichotomum (Cav.) Kuntze
On the status of Mabokopithecus clarki
1985
The discovery of a second specimen of Mabokopithecus clarki at Maboko, Western Kenya, has allowed the reassessment of this enigmatic genus and species. The new specimen, unlike the holotype is complete and undamaged, which dispels the uncertainty about the morphology of the distal part of the tooth, a fact that has always hindered proper assessment of the holotype. It is suggested that the two teeth now assigned to the taxon are teratogenic lower molars of Kenyapithecus africanus . The record of the family Oreopithecidae at Maboko based on Mabokopithecus can now be deleted; only to be replaced by abundant records of a new genus of Oreopithecidae quite different in morphology from Mabokopith…
Subsistence strategies throughout the African Middle Pleistocene: Faunal evidence for behavioral change and continuity across the Earlier to Middle S…
2018
Abstract The African Middle Pleistocene (781–126 ka) is a key period for human evolution, witnessing both the origin of the modern human lineage and the lithic turnover from Earlier Stone Age (ESA) Acheulean bifacial tools to Middle Stone Age (MSA) prepared core and point technologies. This ESA/MSA transition is interpreted as representing changing landscape use with greater foraging distances and more active hunting strategies. So far, these behavioral inferences are mainly based on the extensive stone tool record, with only a minor role for site-based and regional faunal studies. To provide additional insights into these behavioral changes, this paper details a pan-African metastudy of 63…
Geographic Variation in Social Parasite Pressure Predicts Intraspecific but not Interspecific Aggressive Responses in Hosts of a Slavemaking Ant
2015
Variation in community composition over a species' geographic range leads to divergent selection pressures, resulting in interpopulation variation in trait expression. One of the most pervasive selective forces stems from antagonists such as parasites. Whereas hosts of microparasites developed sophisticated immune systems, social parasites select for behavioural host defences. Here, we investigated the link between parasite pressure exerted by the socially parasitic slavemaking ant Protomognathus americanus and colony-level aggression in Temnothorax ants from 17 populations. We studied almost the entire geographic range of two host species, including unparasitized populations. As previous s…