Pseudonemesia tabiskey, a new species of Pseudonemesia Caporiacco 1955 and new ultramorphological data for the Microstigmatinae (Araneae: Microstigmatidae)
Creators: name: Indicatti, Rafael Prezzi
name: Osvaldo Villarreal, M.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy

description: Genus <i>Pseudonemesia Caporiacco 1955</i> <i>Pseudonemesia</i> Caporiacco, 1955: 266 (type species by monotypy, <i>Pseudonemesia parva</i> Caporiacco, 1955); Raven and Platnick 1981: 17, figs 5, 13, 27, 31, 35, 45, 49 <i>–</i> 52; World Spider Catalog 2015. <i>Diagnosis</i> Males of <i>Pseudonemesia</i> differ from those of <i>Micromygale, Microstigmata</i> Strand, 1932, <i>Ministigmata, Xenonemesia</i> and <i>Envia</i> by the oval palpal bulb and short, blunt embolus, curved to ventral side (Figures 1 (a <i>–</i> e), 2(a,b), 11(a); Raven and Platnick 1981, figs 45, 47, 48; Goloboff 1993, fig. 3); and elevated pars thoracica (Raven and Platnick 1981, fig. 51). Females can be distinguished from the <i>Spelocteniza</i> and above-mentioned genera (except from <i>Microstigmata</i>) by the wide spermathecal bases and no twisted ducts (Figure 1 (f)). It can be distinguished from <i>Microstigmata</i> by the absence of labial cuspules (Figure 6 (d)); presence of corrugated trichobothrial bases (Figure 5 (c,d); and no encrusting cuticule with dirt or debris (Figure 6 (a <i>–</i> f)). In addition, <i>Pseudonemesia</i> resembles <i>Envia</i> by the elongated cymbium lacking an anterior notch (Figure 2 (c <i>–</i> e); Goloboff 1993, fig. 3); palpal bulb resting in a cymbial cavity (Figure 1 (a,e); Goloboff 1993, Figure 3); serrula with widely separated teeth and greatly flattened (Figure 8 (c)); modified comb-shaped setae on prolateral border of the maxilla (Figure 8 (b, d)); presence of flattened scaly cuticle with highest distal ends, without digitiform pustules (Figure 4 (c,d); and tarsal organ about two-fifths away from the anterior edge (Figure 4 (a,c,d)); all also here considered as diagnostic features for the Pseudonemesiini. It can be distinguished from <i>Envia</i> by lacking apical paraembolic apophysis on the palpal bulb (Figures 1 (a <i>–</i> e), 2(a,b), 11(a)); presence of spines on cymbium (Figures 1 a,e, 2(c <i>–</i> f); Raven and Platnick 1981, figs 45, 48); tarsal organ rounded in lateral view and twice as elevated (Figure 5 (b)); and elevated spermathecal bases (Figure 1 (f); Raven and Platnick 1981, fig. 54).
description: Published as part of <i>Rafael Prezzi Indicatti &amp; Osvaldo Villarreal M., 2016, Pseudonemesia tabiskey, a new species of Pseudonemesia Caporiacco 1955 and new ultramorphological data for the Microstigmatinae (Araneae: Microstigmatidae), pp. 2153-2167 in Journal of Natural History 50 (33)</i> on page 3, DOI: 10.1080/00222933.2016.1196297, http://zenodo.org/record/165798
description: {"references": ["Caporiacco LD. 1955. Estudios sobre los aracnidos de Venezuela. 2 a parte: araneae. Act Biol Venezuelica. 1: 265 - 448.", "Raven RJ, Platnick NI. 1981. A revision of the American spiders of the family Microstigmatidae (Araneae, Mygalomorphae). Am Mus Novit. 2707: 1 - 20.", "World Spider Catalog. 2015. World Spider Catalog. Nat Hist Mus Bern. cited 2015 Jul 15. Available from http: // wsc. nmbe. ch, version 16.5", "Goloboff PA. 1993. A reanalysis of mygalomorph spiders families (Araneae). Am Mus Novit. 3056: 1 - 32."]}