Colactidinae Hoffman, 1980

Shelley, Rowland M. & Richart, Casey H., 2014, Tynommatidae, n. stat., a family of western North American millipeds: Hypotheses on origins and affinities; tribal elevations; rediagnoses of Diactis Loomis, 1937, and Florea and Caliactis, both Shelley, 1996; and description of D. hedini, n. sp. (Callipodida: Schizopetalidea), Insecta Mundi 2014 (340), pp. 1-19 : 4

Subfamily Colactidinae Hoffman, 1980 , new status

Colactidini Hoffman, 1980:121 ; 1999:200. Shelley, 1996:30–31; 2002a:105. Shelley et al. 2000:57. Stoev et al., 2008:35.

Colactis Loomis, 1937 , type-genus. Four species, southern Nevada and Utah, USA, to southern Baja California Sur, Tiburon Island (Gulf of California), Sonora, and northwestern Durango, Mexico ( Chamberlin 1923, 1958; Loomis 1937; Chamberlin and Hoffman 1958; Hoffman 1954, 1980, 1999; Buckett 1964; Loomis 1968; Jeekel 1971; Shear 1974; Shelley 1996, 2002a; Bueno-Villegas et al. 2004; Stoev et al. 2008).

Heptium Loomis, 1937 . Two species, southernmost California, USA ( Loomis 1937; Chamberlin and Hoffman 1958; Buckett 1964; Jeekel 1971; Hoffman 1980, 1999; Shelley 1996, 2002a; Stoev et al. 2008).

Colactoides Shelley, 1997 . One species, southwestern Chihuahua, Mexico ( Shelley 1997, Hoffman 1999, Shelley et al. 2000, Bueno-Villegas et al. 2004, Stoev et al. 2008).

Remarks. Female as well as male colactidines can be readily distinguished from sympatric diactidines by their substantially longer and more robust bodies (Shelley 1996), which lack stripes and also seem more supple and flexible. Colactidines resemble abacionids more than other tynommatids in these attributes.