Ortholasma colossus
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Ordo: Opiliones
Familia: Nemastomatidae
Genus: Ortholasma
Name
Ortholasma colossus Shear, William A., 2010 – Wikispecies link – Pensoft Profile
- Ortholasma colossus Shear, William A., 2010, ZooKeys 52: 18-20.
Diagnosis
Diagnosis. The notably larger size of the females distinguishes this species of Ortholasma from all others.
Etymology
Etymology. The species name, a Latin noun in apposition, refers to a gigantic statue, or by implication, anything outlandishly large for its type.
Description
Description. Male holotype: total length, 4.5, width, 2.25. Color uniform blackish brown, legs somewhat lighter brown. Carapace arcuate, about twice as wide as long, with complete lateral and posterior submarginal keels; median keels connect eye tubercle and innermost lateral hood process, lateral keels also arising on innermost lateral hood process. Two acute lateral hood processes each about half as long as median hood process. Circumocular keels absent, only subocular portion present. Median hood process arising dorsally on eye tubercle, length 1.6, width 1.0; bearing 24 lateral T-shaped tubercles, all connected. Metapeltidium free, complete keel along anterior margin. Scute 2.6 long, 2.25 wide. Pattern of scute keels typical, paired median scute spines low, scarcely standing above level of keels; posterior marginal keel with complete fenestrations (Fig. 2). Chelicerae (Figs 4, 5, 10) with basal article 0.9 long, 0.25 wide, prominent epigamic gland with dense vestiture of small, fine setae (Fig. 5), otherwise sparsely setose; second article 0.75 long, 0.21 wide, with small, curved mediobasal tooth. Palpus (Figs 6, 20) with dense vestiture of clavate setae; trochanter with several ventral seta-tipped tubercles; tibia swollen; dimensions given in Table 1. Legs in order of length, 2 (11.95), 4 (9.7), 3 (6.3), 1 (5.8); metatarsus 2 with 8 false articulations, otherwise false articulations lacking; tarsi 1-4 with 10, 11, 10, 11 articles respectively. Lengths of leg segments given in Table 1. Leg femora with typical ornamentation (Fig. 7). Genital operculum broadly rounded, marginate, suture faintly indicated. Penis (Fig. 30) 1.0 long, typically thin; glans (Fig. 31) sinuate with hooked tip, subtended by small setae. Female paratype: total length, 6.6, width, 4.2. Nonsexual characters as in male (Fig. 3); median hood process 1.7 long, 0.9 wide. Scute 4.5 long, 4.2 wide. Chelicera without gland on basal article, distal article lacking tooth, basal article 1.05 long, 0.26 wide; distal article 0.90 long, 0.24 wide. Palpal tibia not swollen, dimensions given in Table 2. Legs in order of length, 2 (10.6), 4 (7.34), 3 (5.7), 1 (4.87); metatarsus 2 with 6 false articulations; tarsi 1-4 with 7, 8, 9, 11 articles respectively. Lengths of leg segments given in Table 2. Genital operculum broadly rounded, marginate, without suture. Ovipositor typical. Femur Patella Tibia Metatarsus Tarsus Palpus 1.10 0.76 0.70 - 0.52 Leg 1 1.90 0.60 1.10 1.10 1.10 Leg 2 4.00 0.75 3.50 2.50 1.20 Leg 3 1.90 0.40 2.00 0.90 1.10 Leg 4 3.20 1.00 3.00 1.30 1.20
Distribution
Distribution. All specimens deposited in CAS unless otherwise noted. CALIFORNIA: Fresno Co., 3 mi. south of Trimmer, 4 June 1967, under rhyolite in oak forest, T. Briggs, female (AMNH). Tulare Co., Johnsondale, Kern River, 4 July 1956, V. Roth, W. Gertsch, female (AMNH); Lost Soldier 's Cave, December 1977, A. Grubbs, female (AMNH); 21 July 2003, J. Krejcaet al., female, 23 July 2003, molt fragment, 9 November 2003, female; Lightening Cave, 30 June 1952, A. Lange, female (used for SEM; AMNH); Sequoia National Park, Ash Mtn., 26 April 1951, E. Schlinger, male (AMNH); Paradise Cave, 30 April 2004, J. Krejca et al., male, juveniles; Lange Cave, 6 May 2004, J. Krejca et al., male, 2 females, 6 May 2004, male, female, 7 May 2004, late instar juvenile; Carmoe Crevice, 5 July 2003, J. Krejcaet al., male; May 's Cave, 16 May 2004, J. Krejca et al., female, early juvenile; Hidden Cave, 15 November 2003, J. Krejca, V. Loftin, male; Highway 245, 14 mi. north of Woodlake, near Cottonwood Creek and Rattlesnake Creek confluence, 26 March 2009, M. Hedin et al., female (pictured alive and in the field in Fig. 1). Femur Patella Tibia Metatarsus Tarsus Palpus 1.10 0.90 0.70 - 0.46 Leg 1 1.50 0.52 1.20 1.00 1.10 Leg 2 3.50 0.80 2.60 2.10 1.60 Leg 3 1.80 0.52 1.52 0.90 0.96 Leg 4 2.20 0.80 2.20 1.10 1.04
Taxon Treatment
- Shear, William A.; 2010: New species and records of ortholasmatine harvestmen from Mexico, Honduras, and the western United States (Opiliones, Nemastomatidae, Ortholasmatinae) ZooKeys, 52: 18-20. doi
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