Genus Martiodrilus Michaelsen, 1936

Martiodrilus Michaelsen, 1936: 1172 . — Righi 1971: 4; 1995: 512. — Zicsi & Csuzdi 1997: 82. — Zicsi 2001: 113. — Csuzdi & Pavlíček 2011: 57.

Thamnodrilus – Michaelsen 1900: 434. — Černosvitov 1935: 18.

Thamnodrilus (Thamnodrilus) (part.) — Michaelsen 1918: 86. — Černosvitov 1934: 53. — Fragoso & Brown 2007: 59.

Thamnodriloides – Csuzdi & Pavlíček 2011: 58.

TYPE SPECIES. — Hypogaeon heterostichon Schmarda, 1861 .

DIAGNOSIS. — Setae arranged in eight regular longitudinal lines. One pair of intra-clitellar male pores. Five to eight pairs of calciferous glands in segments VII-XI, XII, XIII, XIV of tubular structure or alveolar structure. Genital apparatus holandric and metagynous. Seminal vesicles generally short, limited to one segment.Spermathecae in pre-testicular segments (Righi 1971). Ovaries in XIII.

Four sub-genera are separated depending on the type of anterior septa, the type of nephridia and the number of spermathecae (Csuzdi & Pavlicek 2011):

Martiodrilus (Martiodrilus) Michaelsen, 1936 has strongly thickened septa after the gizzard and nephridia with a single nephrostome; Martiodrilus (Cordilleroscoloex) Zicsi & Csuzdi, 1997 has strongly thickened septa after the gizzard and nephridia with multiple nephrostomes;

Martiodrilus (Botaria) Zicsi, 1998 has membranous septa after gizzard, nephridia with a single nephrostome and two to three pairs of spermathecae;

Martiodrilus (Maipure) Righi, 1995 membranous septa after gizzard, nephridia with a single nephrostome and four to six pairs of spermathecae.

DISTRIBUTION. — Martiodrilus comprises 85 valid species (not including the new species described here) distributed in South and Central America: Ecuador (57 species), Colombia (22 species), French Guiana (seven species), Peru (six species), Brazil (three species), Surinam (three species), Panama (two species) and Guyana (one species) (http://taxo.drilobase.org/; Misirlioğlu et al. 2023; Brown et al. 2023).