Calityla humboldtensis,

Shear, William A., Richart, Casey H. & Wong, Victoria L., 2020, The millipede family Conotylidae in northwestern North America, with a complete bibliography of the family (Diplopoda, Chordeumatida, Heterochordeumatidea, Conotyloidea), Zootaxa 4753 (1), pp. 1-78: 20-23

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Calityla humboldtensis

new species

Calityla humboldtensis  , new species

Figs. 75View FIGS –85

Types: Male holotype and female paratype from CALIFORNIA: Humboldt Co., 2.75 mi NNE Orleans, Six Rivers National Forest , estimated coordinates taken from CA-96 2.75 mi NNE of the U.S. Post Office in Orleans, elev. 175 m., 41.3311°N, - 123.5131°W, collected 21 December 1976, by RGoogleMaps  . K. Johnson ( FSCA)  .

Diagnosis: In addition to its remarkably simple gonopods, this species differs from all others in Calityla  in having distal knobs on some of the pregonopodal leg prefemora, as well as the femora.

Etymology: The species name, an adjective, refers to the type locality in Humboldt County.

Description: Male holotype: Length, 9.5 mm. 19 ocelli in triangular eyepatch. Metazonites with moderate shoulders on rings 3–26. Coloration pale tan, lightly marked darker brown. Legpairs one and two reduced, three to seven enlarged, fungiform knobs basal on femora four, five and seven, mesodistal on femora six, knobs of femora seven set with small teeth; prefemora four to seven with small distal knobs, smallest on femora six ( Figs. 78–82View FIGS, 85). Anterior gonopods ( Fig. 75View FIGS) large, broad, with small mesal branches about one-tenth length of main, lateral branches, these with finely corrugated areas just below tips. Posterior gonopod coxites ( Figs. 76, 77View FIGS) with simple, acuminate, distally hooked coxites, anteriorly bearing densely fimbriate process. Legpair 10 coxae of normal size, with small glands ( Fig. 83View FIGS), legpair 11 femora with blunt, dorsally directed knobs ( Fig. 84View FIGS).

Female 10 mm long, otherwise as male in nonsexual characters.

Distribution: Only known from the type locality.

Notes: Probably the extra prefemoral knobs allow the males to have a firmer grip on the females during mating.


Departamento de Geologia, Universidad de Chile


Florida State Collection of Arthropods, The Museum of Entomology