Tricellina Forster &amp; Platnick, 1989 in Platnick 1989
Creators: name: Rix, Michael
name: Harvey, Mark
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Micropholcommatidae
Tricellina

description: Genus <i>Tricellina</i> Forster &amp; Platnick, 1989 <i>Tricella</i> Forster &amp; Platnick, 1981: 266 (name preoccupied in Diptera). Type species by original designation <i>Tricella gertschi</i> Forster &amp; Platnick, 1981. Brignoli, 1983: 696. <i>Tricellina</i> Forster &amp; Platnick, 1989 <i>in</i> Platnick, 1989: 166 (replacement name for <i>Tricella</i> Forster &amp; Platnick, 1981). Platnick, 2009. <b>Affinities.</b> The genus <i>Tricellina</i> appears to be the sister-lineage to <i>Austropholcomma</i> from Australia (Fig. 4). <b>Diagnosis.</b> <i>Tricellina gertschi</i> can be distinguished from all other Micropholcommatini by the presence of an extremely long (length &gt;&gt; 5× width), bifurcate embolus with a complex trajectory around the entire pedipalpal bulb (Fig. 45). Other diagnostic characters include the presence of a concave male clypeus in lateral view (Fig. 41A), and the retention of a five-segmented female pedipalp (Fig. 43C). <b>Description.</b> Very small, entelegyne Araneoidea; total length 1.00 to 1.10. <i>Cephalothorax</i>: Carapace without glandular depressions above maxillae; cuticle without glandular pits (Fig. 42E); margins fused to sternum via pleural sclerites; clypeus of male concave in lateral view (Fig. 41A). Eight eyes present on anterior margin of pars cephalica (Fig. 41); AME smallest. Chelicerae with bulging anterior projections in males; promargin with true teeth, a pair of fused setal sockets adjacent to base of fang and single peg tooth in males (Fig. 43F); proximal peg tooth-like seta of fused setal sockets modified in males, proximally-flattened (Fig. 43F); ectal stridulatory ridges present in males. <i>Legs and female pedipalp</i>: Legs three-clawed (Fig. 44D), covered with smooth or serrate hair-like setae. Trichobothria present on tibiae and metatarsi of legs; tibiae each with two (legs I–III) or three (leg IV) trichobothria; metatarsi (legs I–III) each with single trichobothrium (Fig. 44C). Female pedipalp entire, five-segmented; claw absent (Figs 43 C–D). <i>Abdomen</i>: Abdomen oval; anterior sclerite present around epigastric region and petiole; large dorsal scute present on males (Fig. 41A), absent on females (Fig. 40B); lateral sclerotic strips present on males; posterior sclerotic ring surrounding spinnerets and colulus. Six spinnerets situated posterior to fleshy colulus (Figs 23 G–H); PMS with single medial AC gland spigot and apparently without anterior CY gland spigot; PLS with complete triad. Anterior tracheal system with multiple anteriorly-directed tracheae; posterior tracheal spiracle absent. <i>Genitalia</i>: Male pedipalp (Fig. 45) relatively large; trochanter with modified prolateral seta forming stridulatory ‘tooth’; patella with broad, distally-directed, flang- ed ligulate retrolateral apophysis; tegulum smooth, with curved, evaginated tegular ridge; embolus exposed, very long (length &gt;&gt; 5× width), with looped proximal portion and bifurcate distal portion which winds in a complex trajectory around the entire pedipalpal bulb. Female genitalia (Fig. 33D) with pair of separate, globular anterior spermathecae; insemination ducts coiled around fertilisation ducts, with sclerotised proximal portion and expanded, membranous distal portion; fertilisation ducts bent, posteriorly-directed. <b>Distribution.</b> Southern Chile, in Región de la Araucanía (Cautín and Malleco provinces) and Región de los Lagos (Chiloé, Llanquihue, Osorno and Palena provinces) (Fig. 212). <b>Composition.</b> Only the type species <i>Tricellina gertschi</i> (Forster &amp; Platnick, 1981).
description: Published as part of <i>Rix, Michael &amp; Harvey, Mark, 2010, The spider family Micropholcommatidae (Arachnida: Araneae: Araneoidea): a relimitation and revision at the generic level, pp. 1-321 in ZooKeys 36 (36)</i> on pages 34-35, DOI: 10.3897/zookeys.36.306, http://zenodo.org/record/576620
description: {"references": ["Forster RR, Platnick NI (1981) A textricellid spider from Chile (Araneae, Textricellidae). Bulletin of the American Museum of Natural History 170: 263 - 270.", "Brignoli PM (1983) A Catalogue of the Araneae Described Between 1940 and 1981. Manchester University Press, Manchester, 755 pp.", "Platnick NI (2009) The World Spider Catalog, Version 10.0. American Museum of Natural History, New York. http: // research. amnh. org / entomology / spiders / catalog / [accessed 20. X. 2009]"]}