Pachymerium is a genus of centipedes in the family Geophilidae. Centipedes in this genus feature elongate heads, sternal pores in a pair of anterior groups and a posterior transverse band, and scattered coxal pores; the forcipular coxosternite is broad, and the ultimate article of the forcipule has a conspicuous basal denticle. These centipedes range from about 2 cm to about 8 cm in length and have 37 to 79 pairs of legs. The Chilean species Pachymerium armatum measures only 20 mm in length and has only 37 leg pairs, the minimum number observed in this genus. The Russian species P. minutum is also notable for its small size and its modest number of legs. The Portuguese species P. coiffaiti is notable for its large size and many legs. Females of the large Turkish species P. serratum can reach 78 mm in length and have as many as 79 leg pairs, the maximum number observed in this genus. This genus contains the following species:
Geophilus is a large, heterogeneous genus of soil centipedes in the family Geophilidae largely considered to be synonymous with Brachygeophilus. This genus is a mostly holarctic and characterized by a claw-shaped ultimate pretarsus, anterior porefields, complete or nearly complete coxo-pleural sutures at the prosternum, and incomplete chitin-lines. Centipedes in this genus feature slightly elongate heads and labral intermediate parts with tubercles, the forcipules are usually poorly elongate with a single small tubercle at the base of each tarsungulum, and the anterior trunk metasternites usually have an anterior medial socket and a posterior transversally elongate pore-field. The generic name first appeared in Brewster's Edinburgh Encyclopaedia in 1814 as Geophilus electricus.
Sepedonophilus is a genus of three species of centipedes in the family Geophilidae. This genus is endemic to Australia, and was first described by Austrian myriapodologist Carl Attems in 1909. Centipedes in this genus feature scattered coxal pores and have no sternal pores; the lateral parts of the labrum almost touch medially, and the intermediate part is inconspicuous; the coxosternite of the second maxillae have peculiar anterior projections. These centipedes range from about 2 cm to 5 cm in length and have 49 to 79 pairs of legs. The smallest species in this genus, Sepedonophilus hodites, measures only 18 mm in length and has only 49 leg pairs, the minimum number recorded in this genus, whereas the largest species, S. perforatus, measures 50 mm in length and has 79 leg pairs, the maximum number recorded in this genus.
Geomerinus is a monotypic genus of centipedes in the family Geophilidae. It was described by French myriapodologist Henry Wilfred Brolemann in 1912. Its sole species is Geomerinus curtipes, originally described as Geophilus curtipes by Erich Haase in 1887. It is endemic to Australia.
Pachymerinus froggatti is a species of centipede in the Geophilidae family. It is endemic to Australia, and was first described in 1912 by French myriapodologist Henry Wilfred Brolemann.
Queenslandophilus is a genus of centipedes in the family Geophilidae. It was described by German myriapodologist Karl Wilhelm Verhoeff in 1925. Centipedes in this genus feature second maxillae with sclerotized ridges on the coxosternite, no sternal pores, and coxopleura many scattered pores; the lateral parts of the labrum almost touch medially, and the ultimate legs most often have claws. These centipedes range from 1 cm to 6 cm in length, have 37 to 75 pairs of legs, and are found in Australia, Japan, and North America. The Japanese species Queenslandophilus monoporus and Q. macropalpus are notable for their small sizes, measuring only 10 mm and 15 mm in length, respectively. The species Q. elongatus, found in California, is notable for its large size, ranging from 40 mm to 63 mm in length. The species Q. macropalpus has only 37 leg pairs, the minimum number recorded in this genus, whereas Q. elongatus has 73 to 75 leg pairs, the maximum number recorded in this genus.
Ribautia is a genus of centipedes in the family Geophilidae. It was described by French myriapodologist Henry Wilfred Brolemann in 1909. Centipedes in this genus are found in South America, tropical Africa, Madagascar, the Arabian peninsula, Australia, New Zealand, and Melanesia.
Ribautia rainbowi is a species of centipede in the Geophilidae family. It is endemic to Australia, and was first described in 1912 by French myriapodologist Henry Wilfred Brolemann.
Geophilus duponti is a species of centipede in the Geophilidae family. It is endemic to Australia, and was first described in 1897 by Italian entomologist Filippo Silvestri.
Tuoba is a genus of 17 species of centipedes, in the family Geophilidae. It was described by American biologist Ralph Vary Chamberlin in 1920.
Schendyla is a genus of centipedes in the family Schendylidae. It was described by Danish entomologists Vilhelm Bergsøe and Frederik Vilhelm August Meinert in 1866. Centipedes in this genus feature only a few spines on the claws of the second maxillae, two pores on each coxopleuron, and ultimate legs without claws. These centipedes range from 1 cm to about 4 cm in length and have from 31 to 57 pairs of legs. The species Schendyla verneri is notable for its small size and for having only 31 leg pairs, the minimum recorded in this genus. Other small species with notably few legs in this genus include S. walachica, S. dalmatica, S. dentata, S. gracillima. and S. armata. The species S. monoeci measures only 17.5 mm in length but can have from 51 to as many as 57 leg pairs, the maximum number found in this genus. Descriptions of the species S. vizzavonae report no more than 51 leg pairs, but this species is notable for its relatively large size, reaching 45 mm in length.
Maoriella is a genus of centipedes in the family Geophilidae. It was described by Austrian myriapodologist Carl Attems in 1903. Species in this genus are found in New Zealand, Australia, and Tahiti.
Pectiniunguis is a genus of centipedes in the family Schendylidae. It was described by American naturalist Charles Harvey Bollman in 1889. Centipedes in this genus feature second maxillae with claws fringed by two rows of filaments, transversally elliptical sternal pore-fields on almost all trunk segments, two pores on each coxopleuron, and ultimate legs without claws. These centipedes range from 16 mm to 67 mm in length, have 35 to 73 pairs of legs, and are found in the tropical and subtropical regions of the Americas, Fiji, and west Africa. The African species Pectiniunguis minutus is notable not only for being the smallest in this genus but also for having as few as 35 leg pairs, the minimum number in this genus. The Brazilian species P. ducalis is notable not only for being the largest in this genus but also for having as many as 73 leg pairs, the maximum number in this genus.
Ityphilus is a genus of centipedes in the clade Ballophilidae. It was described by American myriapodologist Orator Fuller Cook in 1899. Centipedes in this genus feature distinctly club-like antennae, well marked sclerotized lines on the forcipular coxosternite, and two pores on each coxopleuron. These centipedes range from about 1 cm to about 9 cm in length and have 41 to 113 pairs of legs. The dwarf species Ityphilus donatellae ranges from 8.5 to 11 mm in length and can have as few as 41 leg pairs, the minimum number found in this genus. The large species I. grandis can reach 93 mm in length and have as many as 113 leg pairs, the maximum number found in the clade Ballophilidae.
Marsikomerus is a genus of centipedes in the family Schendylidae. It was described by Austrian myriapodologist Carl Attems in 1938. Species in this genus are found in Mexico and in the United States.
Nesomerium is a monotypic genus of centipedes in the family Geophilidae. It was described in 1953 by American myriapodologist Ralph Vary Chamberlin. The sole species is Nesomerium hawaiiense Chamberlin, 1953. Since the original description of this species based on a single specimen, no other specimens have been referred to this species or this genus, and some authorities express doubts about the validity of these taxa and their placement in the family Geophilidae.
Eucratonyx is a genus of centipedes in the family Gonibregmatidae. This genus was described in 1898 by British zoologist Reginald Innes Pocock. Centipedes in this genus are found from the Andaman Islands to New Britain.
Mecistocephalus uncifer is a species of centipede in the Mecistocephalidae family. It was described in 1919 by Italian myriapodologist Filippo Silvestri. This species has 49 pairs of legs and can reach 65 mm in length.
Mecistocephalus modestus is a species of centipede in the Mecistocephalidae family. It was described in 1919 by the Italian myriapodologist Filippo Silvestri. This species has 49 pairs of legs and can reach 35 mm in length.
Mecistocephalus subgigas is a species of centipede in the Mecistocephalidae family. It was described in 1919 by Italian myriapodologist Filippo Silvestri. This species has 49 pairs of legs and can reach 60 mm in length.
