A female of Cyriocosmus giganteus Kaderka 2016 is described and illustrated for
the first time, a new diagnosis of this species is proposed. Cyriocosmus paredesi sp.
nov. from Quebrada Putuiman (Marañon River) and Cyriocosmus foliatus sp. nov.
from Umaral near Iquitos, both from Loreto Department in Peru, are described,
diagnosed, illustrated and keyed. The male of Cyriocosmus sellatus (Simon 1889)
from Rio Blanco, the tributary of Rio Tahuyao, Loreto Department in Peru, is redescribed
and figured. The distribution area of this species is updated, and difficulties
in the identification of this species are discussed.
The male of Bistriopelma matuskai Kaderka 2015 is described and illustrated, the species is rediagnosed and
complemented by new biogeographical data. Additionally, a new species of Bistriopelma, B. titicaca sp. nov.,
from the Puno region in Peru is described, diagnosed and illustrated. An updated general description and
distribution map of Bistriopelma are provided.
Magnacarina gen. nov. from Mexico is described. Hapalopus aldanus West, 2000 from Nayarit, is transferred to the new genus with an emended diagnosis creating the new combination Magnacarina aldana comb. nov. Three new species are described: Magnacarina moderata Locht, Mendoza & Medina sp. nov. from Nayarit and Sinaloa; Magnacarina primaverensis Mendoza & Locht sp. nov. and Magnacarina cancer Mendoza & Locht sp. nov., both from Jalisco. Magnacarina gen. nov. is characterized by an unusual bifid palpal bulb, and has a primary projection located in the central area of the palpal bulb and directed retrolaterally; this projection possesses the prolateral superior and retrolateral keels. Next to the primary projection is a secondary projection, which may be short or long, ending in the prolateral inferior and apical keel surrounding the sperm pore. This secondary projection may have prolateral accessory keels and is diagnosed by possessing a nodule of inwardly curled megaspines, located in the basal ventro-retrolateral region of metatarsi I in adult males. Additionally, male tibiae I possess three apophyses. Females of Magnacarina gen. nov. have a single reduced and strongly sclerotized spermatheca, with an apical lobe projecting ventrally, and with a uterus externus that is longer and wider than the spermatheca.
A male of Avicularia rickwesti Bertani & Huff, 2013 from Pedernales province, Dominican Republic in the Greater Antillean island of Hispaniola is, herein, described and figured. The males of Avicularia rickwesti differ from all other congeners by the presence of well-developed keels on the embolus of the palpal bulb. The species is rediagnosed.
gen. nov. from the Andean region in Peru is here described, diagnosed and illustrated, together with two new species Bistriopelma lamasi
sp. nov. as a type species and Bistriopelma matuskai
sp. nov. This new genus differs from all other theraphosid genera, except the genus Phrixotrichus
Simon 1889 (sensu Perafán & Pérez-Miles 2014) and the troglobite species Tmesiphantes hypogeus
Bertani, Bichuette & Pedroso 2013, in the presence of two abdominal dorsolateral patches of the type III urticating setae. Bistriopelma
gen nov. can be distiguished from Phrixotrichus
by the different shape of spermathecae in females, consisting of two separate subparallel seminal receptacles in Bistriopelma
gen. nov. but strongly divergent in Phrixotrichus
and by the different morphology of male palpal bulb (embolus projecting retrolaterally from tegulum in Bistriopelma
gen. nov. against posteriorly in Phrixotrichus
); furthermore by the presence of basal spine on prolateral tibial apophysis, the absence of the type IV urticating setae and paired tarsal claws denticulate. Bistriopelma
gen. nov. is separated from Tmesiphantes hypogeus
by the position of the urticating seta patches (middle of abdomen in Bistriopelma
gen. nov. and posterior half in Tmesiphantes hypogeus
), the different shape of spermathecae (long separate seminal receptacles with subapical constriction in Bistriopelma
gen. nov. and short, subtriangular and widely separated in Tmesiphantes hypogeus
) and also in the extension of metatarsal scopulae. Additional comments and a distribution map of all species of this genus are provided.
sp. nov., C. itayensis
sp. nov., C. aueri
sp. nov., C. giganteus
sp. nov. from Peru, Loreto region, C. hoeferi
sp. nov. from Brazil, C. williamlamari
sp. nov. and C. nicholausgordoni
sp. nov. from Venezuela are described, illustrated, diagnosed and both sexes, if known, keyed. New Peruvian species can be distinguished from all congeners, except C. bertae
Pérez-Miles, 1998 and C. pribiki
Pérez-Miles and Weinmann, 2009, by the uniformly coloured carapace and abdomen without stripes and by the short paraembolic apophysis in male palpal bulb. The female of Cyriocosmus ritae
Pérez-Miles, 1998 is described for the first time from a known Peruvian population near Iquitos.
Ami armihuariensis sp. nov. from Cuzco region, Peru is described, diagnosed and figured.
Males of Ami armihuariensis sp. nov. differ from all other congeners, except A. pijaos, by
the presence of only one retrolateral process on male palpal tibia, from A. pijaos by the
granulation in tegular area of male palpal bulb. Additionally, photographs of A. yupanquii
spermatheca are for the first time presented in order to emphasize the characteristic shape of spermathecae in this genus.
Cyriocosmus venezuelensis sp. nov. from Venezuela, State of Lara and Carabobo,
is described, diagnosed and keyed. The new species can be distinguished from
all other congeners by its uniformly coloured carapace, dark ventral band on the
abdomen and by the paraembolic apophysis in male palpal bulb being half the
length of the embolus. Cyriocosmus rogerioi Pérez-Miles & Weinmann, 2009 is
placed in the synonymy of Cyriocosmus pribiki Pérez-Miles & Weinmann, 2009, from which
it does not differ in any characters of specific significance.
sp. n. from Bolivia, Beni province, is described, diag- nosed and keyed inside the inner group of Cyriocosmus
Simon 1903 which is represented by species with reduced paraembolic apophysis in male palpal bulb structures. The new species can be distinguished from all other cogeners, ex- cept C. blenginii
Pérez-Miles 1998, by uniformly coloured carapace and lateral four-striped pattern on abdomen. C. perezmilesi
sp. n. differs from C. blenginii
by presence of the reduced paraembolic apophysis and bicolour femora (reddish brown, distally black).