Pseudocellus
Creators: name: Valdez-Mondragón, Alejandro
name: Francke, Oscar F.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Ricinulei
Ricinoididae
Pseudocellus

description: Key to adult males of Pseudocellus species from Mexico and USA
1 Troglomorphic species with all appendages elongated (Fig. 14): femur II at least 1.5× longer than carapace; tibia II longer than carapace............................................................................................. 2
- Edaphomophic species with short appendages (Fig. 1): femur II less than 1.5× carapace length; tibia II shorter than carapace..................................................................................................... 9
2 Femur II length/width ratio greater than 9; femur II over twice as long as carapace.................................. 3
- Femur II length/width ratio less than 9; femur II less than twice as long as carapace................................. 6
3 Cheliceral fingers with 5 teeth.................................................... P. reddelli (Durango, Mexico)
- Cheliceral fingers with more than 5 teeth.................................................................. 4
4. Leg formula 2413; tibia II twice as long as patella II................................. P. sbordonii (Chiapas, Mexico)
- Leg formula 2431; tibia II less than twice as long as patella II.................................................. 5
5 Tibia I with a granulose prolateral hump (Valdez-Mondragón & Francke 2011, figs. 24, 26); tibia II and tarsus II unarmed.............................................................................. P. platnicki (Coahuila, Mexico)
- Tibia I without a granulose prolateral hump (Valdez-Mondragón & Francke 2011, fig. 17); tibia II and tarsus II with two dis- tinct rows of spines prodorsally and proventrally (Valdez-Mondragón & Francke 2011, fig. 19)... P. oztotl (Puebla, Mexico)
6 Leg formula 2341; cheliceral fixed finger with 4 teeth; tarsal claws asymmetrical, some spatulate.................................................................................................... P. bolivari (Chiapas, Mexico)
- Leg formula 2431; cheliceral fixed finger with 5 or 6 teeth; tarsal claws symmetrical, none spatulate.................. 7
7 Tibia II elongated, around 11× longer than wide, with scattered spines or scattered granules prolaterally................. 8
- Tibia II shorter, around 6× longer than wide, with two distinct rows of spines prolaterally...... P. boneti (Guerrero, Mexico)
8 Tibia II with a few scattered spines prolaterally; cheliceral movable finger with teeth uniform in size............................................................................................ P. osorioi (San Luis Potosí, Mexico)
- Tibia II without scattered spines, only with numerous granules prolaterally (Fig. 17); cheliceral movable finger with teeth lon- ger basally than distally (Fig. 18)...................................... P. monjarazi new species (Chiapas, Mexico)
9 Tibia II armed with one or two distinct tubercles prolaterally (Valdez-Mondragón & Francke 2011, fig. 3).............. 10
- Tibia II without distinct tubercles prolaterally (Figs 4, 5).................................................... 12
10 Femur II moderately thickened, 4× longer than wide; tibia II with a single prodorsal tubercle, lacking a distinct proventral tubercle....................................................................... P. pearsei (Yucatán, Mexico)
- Femur strongly thickened, less than 2.5× longer than wide; tibia II with prodorsal and proventral tubercles subequal in size..................................................................................................... 11
11 Femur II shorter than carapace; tibia II with prodorsal and proventral tubercles aligned, situated medially........................................................................................... P. spinotibialis (Chiapas, Mexico)
- Femur II distinctly longer than carapace; tibia II with tubercles not aligned, proventral tubercle in basal third, and prodorsal one in distal third (Valdez-Mondragón & Francke 2011, figs. 1, 3)....... P. chankin (Chiapas, Mexico; Petén, Guatemala)
12 Leg formula 2431; carapace and opisthosoma distinctly and evenly pitted....................................... 13
- Leg formula 2341; integument not distinctly pitted......................................................... 14
13 Adult 3.2 mm in total length; tibia II slightly over 0.5× carapace length; patella II and tibia II subequal in length.......................................................................................... P. do ro thea e (Texas, USA)
- Adult 5.0 mm in total length; tibia II almost equal to carapace length; tibia II 1.5× longer than patella II............................................................................................. P. mitchelli (Durango, Mexico)
14 Femora I and IV conspicuously enlarged, at least 1.5× thicker than preceding and following segments............................................................................................... P. gertschi (Veracruz, Mexico)
- Femora I and IV not enlarged, about same thickness as preceding and following segments (Fig. 1).................... 15
15 Femur II thickened (Fig. 1), around 2.5× longer than wide; tibia II at least 1.5× length of patella II................... 16
- Femur II not thickened, slightly over 4× longer than wide; tibia II 1.2× longer than patella II.................................................................................................. P. pelaezi (San Luis Potosi, Mexico)
16 Tarsal process of leg III narrow, with two tips distally (Valdez-Mondragón & Francke 2011, figs 13–14).............................................................................................. P. jaroch o (Chiapas, Mexico)
- Tarsal process of leg III wide, ending in a single, long, thin and sharp tip (Figs 10–12)................................................................................................ P. cruzlopezi new species (Oaxaca, Mexico)
description: Published as part of Valdez-Mondragón, Alejandro & Francke, Oscar F., 2013, Two new species of ricinuleids of the genus Pseudocellus (Arachnida: Ricinulei: Ricinoididae) from southern Mexico, pp. 545-556 in Zootaxa 3635 (5) on pages 546-547, DOI: 10.11646/zootaxa.3635.5.4, http://zenodo.org/record/219614