Amplaria Chamberlin, 1941

Shear, William A., Nosler, Philip & Marek, Paul E., 2022, The millipede family Striariidae Bollman, 1893. IV. Amplaria oedipus, n. sp., with a secondary sexual modification of males unique among millipedes (Diplopoda Chordeumatida, Striarioidea), Zootaxa 5099 (1), pp. 137-145 : 138-144

Genus Amplaria Chamberlin, 1941

For synonymy and a detailed discussion of the genus, see Shear (2020, 2021a).

Key to species of Amplaria

Key based on males. Amplaria eutypa and A. eldora are not included (both descriptions based on females only).

1a. Tarsi 5 and 6 of males pyriform, much enlarged....................................................... oedipus .

1b. Tarsi 5 and 6 of males similar to other tarsi.................................................................2.

2a. Eyeless, with troglobiotic adaptations.....................................................................3.

2b. Ommatidia present, not troglobiotic.......................................................................4.

3a. Length 25 mm or greater.......................................................................... shastae .

3b. Length about 12 mm ........................................................................... flucticulus.

4a. First legs of males with long, needle-like setae..............................................................5.

4b. First legs of males without long, needle-like setae............................................................8.

5a. Coxae and trochanters of legs 2 separate, not fused...................................................... staceyi.

5b. Coxae and trochanters of legs 2 fused.....................................................................6.

6a. Third coxal flasks separate, but tightly appressed in midline.............................................. nazinta.

6b. Third coxal flasks basally fused..........................................................................7.

7a. Four or fewer ommatidia........................................................................ crawfordi.

7b. Seven to 9 ommatidia........................................................................... fontinalis.

8a. Telson elongate, flattened...............................................................................9.

8b. Telson not elongate, not flattened........................................................................10.

9a. Metatergal crests posteriorly elevated................................................................ arcata.

9b. Metatergal crests moderately developed, not elevated.................................................. rykkenae.

10a. Length 16–17 mm ................................................................................. muiri .

10b. Length 9–12mm .....................................................................................11.

11a. Thirteen to 15 ommatidia..............................................................................12.

11b. 5 or fewer ommatidia.................................................................................13.

12a. Coxae of legpairs 4 and 5 depressed, finely setose................................................... mendocino.

12b. Coxae of legpairs 4 and 5 not depressed.............................................................. cervus.

13a. Process of second trochanter very short or apparently absent.............................................. baughi.

13b. Process of second trochanter of moderate length............................................................14.

14a. Gonopod anterior angiocoxite simple, scoop-like...................................................... imberbis .

14b. Gonopod anterior angiocoxite with lateral branch...........................................................15.

15a. Coxal flasks of legpair 3 long, gradually tapered....................................................... umatilla.

15b. Coxal flasks of legpair 3 short, basally swollen......................................................... adamsi .