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| Chinchaysuyu spinosa Ferretti, Chaparro, Ochoa & West, 2023 |
Abstract
Chinchaysuyu gen. nov. is described as a new monotypic Theraphosidae genus from northern Peru, with distinct genitalic morphology. Males of Chinchaysuyu gen. nov. differ from all known species by having a palpal bulb organ with many conspicuous keels extending towards the subtegulum. Females differ by having two pairs of short and hyper-sclerotized receptacles. This new genus is described and illustrated on the basis of the type species Chinchaysuyu spinosa sp. nov. and their morphological affinities and its phylogenetic position are analyzed and discussed.
Keywords: Taxonomy, Theraphosinae, New species, Cajamarca, Andes
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| (A–B) Chinchaysuyu spinosa sp. nov., male, habitus. (C) Habitat from type locality (San José) of Chinchaysuyu gen. nov. |
Chinchaysuyu gen. nov.
Etymology. Chincha = North, suyu = region, from Quechua language (Academia Mayor de Lengua Quechua 2005) is a noun that refers to the largest of the four divisions of the Inca Empire, which comprises the northern Andes, where this new genus was found. The gender is feminine.
Diagnosis. Chinchaysuyu gen. nov. differs from all known genera by the palpal bulb with a large subtegulum having a high number of well-developed and extended keels (Fig. 1, Fig. 5) and female spermatheca consisting in two pairs of receptacula (Fig. 9D). In addition, it differs from the majority of Theraphosinae genera by the reduce number of labial cuspules in combination with short spiniform setae on ventral maxillae (Fig. 2, Fig. 4, Fig. 9C); from Antikuna, the other theraphosine genus with spiniform setae on ventral maxillae, in the morphology of the male palp (Fig. 1, Fig. 5), the presence of long spiniform setae retrolateral on male cymbial lobe (Fig. 2E and F) and female spermatheca morphology (Fig. 9D).
Chinchaysuyu spinosa sp. nov.
Etymology. The specific epithet is a Latin adjective, meaning ‘spined’ and refers to the presence of spines on the ventral maxillae.
Nelson Ferretti, Juan C. Chaparro, José A. Ochoa and Rick West. 2023. A New Tarantula (Mygalomorphae: Theraphosidae) Genus endemic from Peru with A Novel Genitalic Morphology among Theraphosinae and Its Phylogenetic Placement. Zoologischer Anzeiger. 302; 102-112. DOI: 10.1016/j.jcz.2022.11.011
