Bimastos parvus (Eisen, 1874)

Blakemore, Robert J., 2013, Ulleung-do earthworms - Dagelet Island revisited, Journal of Species Research 2 (1), pp. 55-68 : 62-64

Bimastos parvus (Eisen, 1874)

Material examined. INV0000261250, four specimens from Tongumi, a “ parvus ” morph providing DNA sample w51, and a “ beddardi ” morph providing w52. Results in Appendix.

Description. Lengths 42-45 mm. Colour pinkish. Dorsal pores from 4/5. Clitellum in 24-30 lacking tubercular pubertatis ( B. parvus sample w51) or clitellum in 25,26- 31 with tubercula pubertatis in 29-30 ( B. beddardi sample w52 that returns DNA result as D. rubidus ).

Note. One of the four specimens has first dorsal pore in 6/7 and clitellum in 26,27-31 with faint tubercula in 29- 30; however, segment 16 is abnormal perhaps invalidating these counts.

Remarks. The four specimens looked similar but varied slightly. Bimastos parvus is a cosmopolitan species usually with synonym Bimastos beddardi (Michaelsen, 1894) included. However Hong (2000) - while consistently misspelling parvus as “ parva ” - attempts to revive this taxon in Korea, possibly following Kobayashi (1941: 156). Nevertheless, this is the first record of either from Ulleung-do. Original orthography, type localities and types of these two taxa (and an intervening synonym) are:

Allolobophora parva Eisen, 1874: 46 [locality Mt Lebanon, New York. Types in US National Museum].

Dendrobaena constricta (part): Friend, 1893: 19 [non Allolobophora constricta Rosa, 1884: 38 (= Dendrodrilus rubidus )].

Allolobophora beddardi Michaelsen, 1894: 182 [locality Orlando, Orange County, Florida in a rotted tree trunk.

Type Hamburg, 153]. [Non A. beddardi Ribaucourt, 1896 (= Ap. caliginosa / trapezoides complex)].