Geophilus anonyx explained

Geophilus anonyx is a species of soil centipede in the family Geophilidae^[1] found in Oregon.^[2] It was originally placed in the genus Brachygeophilus based on the lack of sternal pores, a character shared with the type species B. truncorum^[3] (now Geophilus truncorum), however it was later moved to Geophilus.^[2]

Description

G. anonyx has 57 leg pairs and grows to a length of 24 millimeters. It's characterized by a prosternum lacking chitinous lines; dorsal plates distinctly bisulcate (cloven); spiracles all circular, last ventral plate narrow; coxal pores small, about a dozen on each side; anal pores present, distinct; and anal legs with tarsus biarticulate, without terminal claw.^[4] Like G. tampophor, it differs from other western American geophilids by having prehensorial claws armed at the base, however unlike G. tampophor it possesses unarmed anal claws and a greater number of legs.^[5]

Notes and References

1. Web site: ITIS - Report: Geophilus anonyx . Integrated Taxonomic Information System . 17 December 2021.
2. Web site: Geophilus anonyx (Chamberlin,1941) . ChiloBase 2.0 . 17 December 2021.
3. Bonato . Lucio . Minelli . Alessandro . Zapparoli . Marzio . Morphology, taxonomy and distribution of Diphyonyx gen. n., a lineage of geophilid centipedes with unusually shaped claws (Chilopoda: Geophilidae) . European Journal of Entomology . 2008 . 105 . 2 . 343–354 . 10.14411/eje.2008.041 . 17 December 2021. free . 11577/2452453 . free .
4. Chamberlin . Ralph V. . New genera and species of north American geophiloid centipedes . Annals of the Entomological Society of America . 1941 . 34 . 4 . 773–790 . 10.1093/aesa/34.4.773 . 17 December 2021.
5. Chamberlin . Ralph V. . Two New Oregon Chilopods of the Order Geophilida . Psyche: A Journal of Entomology . 1953 . 60 . 37–39 . 10.1155/1953/47646 . free .