Siremata Passanha & Brescovit 2018, new genus
Creators: name: Passanha, Victor
name: Brescovit, Antonio D.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Dipluridae
Siremata

description: Siremata new genus
Type species. Siremata valteri n. sp.
Etymology. The generic name is an anagram of Masteria and herein considered a feminine noun.
Diagnosis. Siremata differs from the other Masteriinae in the presence of microspines around the eyes (Fig. 40B), the quadrate pattern of the eyes, with the posterior median eyes being on a tubercle (Fig. 40A) and males with ventral megaspine in the median region of tibia I (Fig. 40C).
Description. Small-sized mygalomorph spiders, total length between 2.16̄4.25. Color: carapace in dorsal view, chelicerae and legs varying from whitish to dark brown, with variations of yellow, orange and light brown. Endites, labium and sternum light brown to whitish. Abdomen light brown or whitish. Clypeus narrow (0.01̄0.03) in relation to ALE. Chelicerae without rastellum. Basal segment of chelicerae with row of 9̄13 prolateral teeth and row of 10¯18 mesobasal denticles (Fig. 41C). Ocular tubercle wider than long, with six eyes; AME absent, posterior row straight, PME on elevated tubercle (Fig. 40A). Tegument around eyes with microspines (Fig. 40B). Labium wider than long, without cuspules. Endites without cuspules, with linear serrula on apical border (Fig. 41A). Sternum oval, longer than wide, without evident sigilla. Tarsus of all legs without scopulae, with few sensorial setae interspaced or many sensorial setae. Two superior tarsal claws, a row of teeth (5̄11), inferior claw with 2–4 teeth. Tibia I of males with ventral megaspine on medial portion (Fig. 40C), absent in Siremata lucasae n. sp. Cymbium of male palp with 2–4 apical spines. Trichobothria filiform, corrugated bases, with longitudinal keels (Fig. 41B); Legs with one dorsal trichobothrial row on tarsus and two, dorsal and dorso-retrolateral, on metatarsus and two dorsal on tibia. Tarsal organ without elevation with low and concentric keels (Fig. 41D). Palp with one row of trichobothria on tarsus and two on tibia. Abdomen with oval pulmonary opening. Posterior median spinnerets short with spigots on apex, australotheline crescent present. Posterior lateral spinnerets 3-segmented, elongated, apical segment with triangular apex, major ampulate spigots, aciniform spigots and pumpkiniforms spigots present on ventral face. Female palp with one or two ventral spines on tarsus base, tarsal claw with central row of 13̄14 teeth. Male palp: cymbium as wide as long, with short prolateral lobe, tibia with median retrolateral grouped spines or setae (Fig. 42D, 44E), absent in S. juruti n. sp. Palpal bulb elongated (Fig. 42B, 44C) or dorso-ventrally flattened (Fig. 43B ̄C). Embolus elongate. Female genitalia: spermathecae bilobed, elongate (Fig. 42F, Fig. 44E) or short (Fig. 43E ̄F). Glandular region short with large glands in ducts (Fig. 42F, 44F), except in S. juruti n. sp., not evident (Fig. 43E–F).
Species included. Siremata valteri n. sp., S. lucasae n. sp., S. juruti n. sp.
Distribution. Brazilian Amazon region (Fig. 45).
description: Published as part of Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), pp. 1-73 in Zootaxa 4463 (1) on page 62, DOI: 10.5281/zenodo.1441911