Bidentogon californicus (Chamberlin,1918)

Shear, William A. & Marek, Paul E., 2021, Three new genera and eighteen new species of miniature polydesmid millipedes from the northwestern United States (Diplopoda, Polydesmida, Polydesmidae), Zootaxa 4975 (1), pp. 81-126 : 88

publication ID

https://doi.org/ 10.11646/zootaxa.4975.1.3

publication LSID

lsid:zoobank.org:pub:DB7C9028-3EDF-454F-88D0-336624AD1DC4

DOI

https://doi.org/10.5281/zenodo.4804964

persistent identifier

https://treatment.plazi.org/id/03B18797-FFEE-9D0E-4BA5-05ADDC3D2420

treatment provided by

Plazi

scientific name

Bidentogon californicus (Chamberlin,1918)
status

 

Bidentogon californicus (Chamberlin,1918) View in CoL

Figs 1–6 View FIGURES 1–6

Brachydesmus californicus Chamberlin 1918:9 View in CoL .

Bidentogon helferorum Buckett & Gardner 1968:198 View in CoL ; Shear, 1972:490.

Bidentogon californicus, Shelley, 2003:10 View in CoL View Cited Treatment .

Diagnosis. The terminal zone of the gonopod (tz, Fig. 6 View FIGURES 1–6 ) is acute, not expanded as it is in the other known species of the genus. The anterior marginal row of setae on the collum ranges in number from 14 to 16 ( Fig. 1 View FIGURES 1–6 ).

Notes. After some confusion, the name of this species was finally settled by Shelley (2003). Shear (1972) had discovered the supposed type material of Chamberlin’s Brachydesmus californicus in the collections of the Museum of Comparative Zoology and redescribed that species while applying the genus name Bidentogon (at the time Chamberlin described the species, any polydesmid with 19 rings was placed in Brachydesmus , now understood as an exclusively European genus). However, Shelley (2003) was able to show that B. helferorum was actually a synonym of B. californicus , and provided the new name B. expansus Shelley, 2003 , for Shear’s concept of B. californicus .

Buckett & Gardner (1968) provided a good detailed description of this species (as B. helferorum ), supplemented by Shear (1972) with additional illustrations. Shelley (2003) documented and mapped many new localities from Alameda, Marin, Mendocino, San Mateo, Santa Clara and Santa Cruz counties in California. Here we provide SEM illustrations for the first time ( Figs 1–6 View FIGURES 1–6 ). Using material temporarily mounted on microscope slides, it was possible to trace the seminal canal out to the tip of the shorter gonopod branch, which is therefore referred to as a solenomere. No vesicle could be seen and the course of the canal is more or less direct, though it does sharply change direction laterad near the base of the solenomere. The simple, acute, terminal zone distinguishes this species from B. expansus , in which the terminal zone widens distally.

Distribution. San Francisco Bay region of California, and north to Mendocino County ( Shelley, 2003)

New records. CALIFORNIA: Marin Co.: 1 mi. west of Bolinas (37.308°, -122.706°), 16 January 1960, C. Judson, m ff ( FSCA); 3 mi northwest of Inverness (38.124°, -122.903°), 8 May 1976, A. Newton, M. Thayer, m, f ( FMNH); 6 mi east of Point Reyes Station (38.094°, -122.735°), A. Grigarik et al., 1 March 1960 ( FSCA) . San Mateo Co.: 0.5 mi southeast of Half Moon Bay (37.462°, -121.530°), 18 May 1954, R. Schuster mm ff ( FSCA) .

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

FMNH

Field Museum of Natural History

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Polydesmida

SubOrder

Polydesmidea

SuperFamily

Polydesmoidea

Family

Polydesmidae

Genus

Bidentogon

Loc

Bidentogon californicus (Chamberlin,1918)

Shear, William A. & Marek, Paul E. 2021
2021
Loc

Bidentogon californicus

Shelley, R. M. 2003: 10
2003
Loc

Bidentogon helferorum

Shear, W. A. 1972: 490
1972
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF