Geophilus mordax
Meinert, 1886
pitted soil centipede
Geophilus mordax, commonly called the pitted soil , is a soil-dwelling geophilid centipede native to North America. It is a moderately sized averaging 25–40 mm in length, with a bright red coloration and 49–57 leg pairs depending on sex. The species is distinguished by the presence of a sacculus or pit on each sternite, a key diagnostic feature that separates it from similar .
Pronunciation
How to pronounce Geophilus mordax: /ˈdʒiːəˌfaɪləs ˈmɔːrdæks/
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Identification
Distinguished from Geophilus ampyx by the presence of a sacculus or pit on each sternite. Polymorphic; some forms possess lateral coxo- pores on the ultimate legs while others lack them. Forms without pores may exhibit a chitinous thickening on the postero- surface of the coxopleuron, possibly representing closed or pores.
Appearance
Bright red in color. Body length averages 25–40 mm, with maximum recorded length of 50 mm. Males possess 49–53 pairs of legs; females possess 49–57 pairs of legs. Bears 3–5 labral teeth. Second have a short and robust claw. Prebasal plate is exposed. Sacculi are large and consolidated.
Habitat
Soil-dwelling; inhabits soil environments. Specific microhabitat preferences beyond general soil association are not documented.
Distribution
North America, with records from Indiana, Arkansas, Louisiana, North Carolina, South Carolina, and Florida.
Similar Taxa
- Geophilus ampyxOften confused with G. mordax; distinguished by the absence of a sacculus or pit on each sternite
- Geophilus virginiensisPossibly ; represents the form of G. mordax with lateral coxo- pores on the ultimate legs
- Geophilus louisianae / Geophilus atopleurusPossibly ; represents the form of G. mordax without lateral coxo- pores on the ultimate legs
More Details
Taxonomic Uncertainty
G. mordax is polymorphic and may comprise two separate : one with lateral coxo- pores on the ultimate legs (sometimes recognized as G. virginiensis) and one without (sometimes recognized as G. louisianae or G. atopleurus).