Tylobolus utahensis Chamberlin 1925

Tylobolus utahensis Chamberlin
Tylobolus utahensis Chamberlin, Pan-Pacific Ent., vol. 2, p. 60. 1925.
Calif orniholus utahensis Chamberlin, Journ. Washington Acad. Sci., vol. 39, p.
166. 1949. Californibolus utahensis, Chamberlin and Hoffman, U. S. Nat. Mus. Bull., no.
212, p. 162. 1958.
Diagnosis. — Distinguished from all other species of the genus except uncigerus and fredricksoni by the broad distal ends of the anterior telopodites of the male gonopods. Differs from the two species mentioned in details of the posterior gonopods, and from the former also in having few striae on sides and weak anal lips.
Description. — Measurements and segment count based on one male, all other characters based on tw^o males.
L 68 mm. ; W 5.4 mm. ; L/W 12.6. Segments 53.
Eyes 35 + 36, 33 + 34. Clypeal setae 8, 9 ; labral setae 14, 14. Stipital setae of gnathochilarium 8 + 7, 8 + 9. Antennal groove not as deep as in uncigerus.
Striae of hindbelts ending about midway between pleural sutures and repugnatorial pores.
Anal lips indistinct.
Coxae and other podomeres of male legs similar to those of claremontus. Claws of 1st and 2nd legs not quite as long as last podomeres, those of legs 3-7
about a third as long as last podomeres; claws of postgenital legs slightly shorter than last podomeres.
Coxal endites of anterior gonopods much exceeding apex of sternum, their mesoventral corners produced ventrad. Anterior telopodites broad distally, not uncinate. Posterior telopodite not curved like that of other species, tibiotarsal portion relatively straight and approximately perpendicular to prefenioral portion, distal process thus directed away from base of telopodite. Inner plate of tibiotarsal region subrectangular, running far along process, distally forming approximately right angle with process; free corner of inner plate sharply angled. Spicules on cephalic face of tibiotarsus and also along outer border of receptacle wall. Postgenital bar relatively broad and flat, not raised as in uncigerus.
Type.— Ma.Q (MCZ). Locality: Utah, Zion National Park. I have seen the holotype and a male paratype. The species has not been taken since its original collection.