Three new species of Strengeriana from Colombia (Crustacea: Decapoda: Pseudothelphusidae) (original) (raw)
Related papers
Proceedings of the Biological Society of Washington, 2006
We describe a new species of Strengeriana Pretzmann, 1971, S. villaensis, from Villahermosa, Tolima Department, on the eastern slope of the Central Andes. The genus is endemic to Colombia and is distributed in the Sierra Nevada de Santa Marta and the Western and Central Andes, at elevations ranging from 700 to 2000 m. With the addition of S. villaensis the total number of species in the genus rises to 16. This new species is distinguished from its congeners primarily by the morphology of the first male gonopod, particularly by the shape of the mesial, cephalic and lateral lobes, and the mesial and cephalic processes. We present a key for the identification of the species of the genus based on the morphology of the first male gonopod and the third maxilliped.
New species of freshwater crabs (Crustacea: Decapoda: Pseudothelphusidae) from Colombia
Proceedings of the Biological Society of Washington., 1984
Tv^o new species of Pseudothelphusidae are described from Colombia. Strengeriana chaparralensis, n.sp. adds a fifth species to a primitive group of crabs from the Central Cordillera; its gonopod resembles that of its nearest geographic relative, S. tolimensis Rodriguez and Diaz, 1981. Chaceus davidi, n.sp. also belongs to a small genus of primitive crabs from the Sierra de Santa Marta; the gonopod has characters of both Chaceus and Hypolobocera. A geographical record is given for Hypolobocera martelatani Pretzmann, 1965, which was originally described from an unknown locality in "Columbia.
New species of freshwater crabs from the Andes (Crustacea: Decapoda: Pseudothelphusidae)
Three new species of Pseudothelphu sidae are described from the Andes. Strengeriana tolimensis n. sp, belongs, with four other species, to a primitive group of crabs of the Central Cordillera of Colombia. Hypolobocera quevedensis n. sp. is closely related to H. ratbbuni PRETZMANN 1968, both from the western slopes of the Andes of Ecuador. Hypolobocera brevipenis n. sp. forms a natural series with four other species from the eastern slopes of Ecuador and Peru. • During a recent trip throughout the Andes, the junior author had the oppor tunity of collecting freshwater crabs at several localu.es. in Colombia, Ecuador and Peru. Among this material are several interest! ivz specimens, in particular a new species of the genus Strengeriana. This genus groups the most primitive members or the Pseudothelphusidae still surviving in South America, according to an hypotnesis recently formulated !w RODRIGUEZ (in press). The addition of a fourth species to the genus not only completes the pictur...
Journal of Crustacean Biology, 1989
The species of Strengerianini are restricted to altitudinal levels between 900 and 3,000 m in the Eastern, Western, and Central Cordilleras, and the Sierra Nevada de Santa Marta in Colombia, and the Sierra de Perija in Venezuela. A cladistic analysis of the genera Chaceus and Strengeriana, including the new species Strengeriana risaraldensis, Strengeriana bolivarensis, Strengeriana huilensis, and Strengeriana taironae, using somatic and gonopodal characters, confirms the separation of both genera and suggests the geographic disjunction of 3 sister groups. Bridging of these disjunctions requires, within a dispersalist hypothesis, the establishment of migratory paths either across extensive areas of lowlands or through a very long stretch of continuous highlands, if the present geography is assumed. It is suggested that the group was widespread in the area by Miocene times. Later the uplifting and displacement of the Santa Marta Massif led to disruption of the ancestral Strengerianini stock to form the actual pattern of distribution and diversification. This model requires dating the first radiation of the Strengerianini before the end of the Miocene, after a previous splitting of the family into sister groups, in the Antilles and in the northern Andes, in Eocene times.
Zootaxa, 2010
A new species of the genus Strengeriana Pretzmann, 1971, is described. With the addition of the new species, this genus now includes 15 species, distributed in the Sierra Nevada de Santa Marta, and the Western, Central and Eastern Cordilleras of the Colombian Andes, at altitudes ranging from 700 to 1800 m above sea level. The species are distinguished by morphological characteristics of the first male gonopod.
A new species of the genus Neostrengeria Pretzmann, 1965, N. lemaitrei from Magdalena Valley, Cundinamarca Department, is described. The genus is endemic to the Eastern Andes of Colombia, at altitudes ranging from 300 to 300 m above sea level. With the addition of N lemaitrei the total number of species rises to 21. This new species, like all others in Neostrengeria, is distinguished primarily by the morphology of the first male gonopod, partic ularly by the form of lateral and accessory lobes, and the shape of the apex.
A new species of freshwater crab of the genus Neostrengeria Pretzmann, 1965, N. binderi, is described from Alto de Cunday, Tolima De partment, Colombia. The addition of this new species brings to 18 species and 2 subspecies the total number of taxa known in this genus endemic to the Eastern Andes of Colombia. The genus Neostrengeria Pretzmann, 1965, comprising 18 species and 2 subspe cies of pseudothelphu sid crabs, is endemic to the Eastern Andes of Colombia. On the west slope, the genus was known as far south as Cundinamarca, but recent collec tions in the Cunday region of eastern Toli ma have resulted in the discovery of a new species, which extends the range of the ge nus ca. 50 km further south. Additional ex plorations in the region have failed to locate this species west of the Magdalena river, confirming the association of the genus with the Eastern Andes. The systematics of Neostrengeria were established by Rodriguez (1982) and have been recently reviewed by Campos (1...
Caldasia, 2008
We describe two new species of Neostrengeria Pretzmann, 1965, N. bataensis, from Santa María, Boyacá Department, and N. celioi, from Aguazul, Casanare Department, on the eastern slope of the Eastern Andes. With the addition of the new species, the number of species in the genus rises to 23. These new species are distinguished from their congeners primarily by the morphology of the first male gonopod, particularly by the shape of the lateral and accessory lobes, outline of apex, mesocaudal projection and mesial lobe. The genus Neostrengeria is endemic to Colombia and is distributed in both slopes and the high plain of the Eastern Cordillera, at elevations ranging from 470 to 3000 m. We present a key for the identification of the species based essencially on the morphology of the first male gonopod and pereopods.