Diactidinae Shelley, 1996

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 : 4-5

Subfamily Diactidinae Shelley, 1996 , new status

Diactidini Shelley, 1996:40; 2002a:106. Hoffman, 1999:203. Shelley et al. 2000:57. Stoev et al., 2008:36.

Type-genus. Diactis Loomis, 1937

Diagnosis. (adapted from that of Diactidini by Shelley [1996]). Small-bodied Tynommatidae with conspicuous lateral stripes; median primary crests on pleuroterga 3–5 diverging caudad, transition to full complement of dorsal carinae on segments 7–8. Males smaller than females; 7 th male legs subequal to 6 th, 6 th and 7 th segments noticeably inflated; gonopodal aperture large and conspicuous, telopodites protruding in situ, widely separated from 7 th legs. Gonocoxae narrowly segregated by variably narrow sternum, expanding laterad into broad laminae extending to lateral side of, and enveloping, coxa, also expanding anteriad across base of telopodal stem, without anterior sternal plates, flagella, caudal sternal processes, and coxal processes. Telopodites arising anteriad from coxae, with or without true prefemoral processes; stems divided distal to midlengths into slender tibiotarsi, solenomere branches, and processes ‘B’ apparently representing relocated prefemoral processes; solenomere branches usually redivided, processes ‘A’ usually present.