Fabaeformiscandona japonica ( Okubo, 1990 )

Smith, Robin J. & Janz, Horst, 2008, Recent species of the Family Candonidae (Ostracoda, Crustacea) from the ancient Lake Biwa, Central Japan, Journal of Natural History 42 (45 - 46), pp. 2865-2922 : 2868

Fabaeformiscandona japonica ( Okubo, 1990)

( Figures 2A,B and 3 A–E)

Candona japonica Okubo, 1990

Fabaeformiscandona holzkampfi (Hartwig, 1990) : Okubo, 2004 (misidentification)

Remarks

This species has previously been reported from the Prefectures of Okayama, Fukuoka, Gunma ( Okubo 1990, 2004) and Ishikawa ( Smith and Kamiya 2007). It is commonly found in rice fields and the watercourses associated with them (e.g. irrigation ditches and ponds) ( Okubo 1990, 2004). Smith and Kamiya (2007) reported this species from a man-made pond in Kanazawa, Ishikawa Prefecture, living in the littoral zone on a muddy substrate. Okubo (2004; citing Janz et al. 2001) reported this species living at a depth of 20 m in Lake Biwa. This survey collected F. japonica from depths ranging from the littoral zone to 22 m. Localities 35, 44, 66, 70, 78, 81, 87, 88, 90 and 94 in Figure 1 .

Figures

Figure 1. Location of Lake Biwa and sampling localities.

Figure 2. (A, B) Fabaeformiscandona japonica. (A) Male, whole carapace, right lateral view (LBM 1430003270); (B) female, whole carapace, right lateral view (LBM 1430003271). (C, D) Fabaeformiscandona tora. (C) Male, whole carapace, right lateral view (LBM 1430003275); (D) female, whole carapace, right lateral view (LBM 1430003276). (E, F) Fabaeformiscandona myllaina. (E) Male, whole carapace, right lateral view (LBM 1430003280); (F) female, whole

Figure 3. (A–E) Fabaeformiscandona japonica. (A) Male left valve, internal view (LBM 1430003274); (B) female left valve, internal view (LBM 1430003273); (C) male left L5 palp (LBM 1430003272); (D) male right L5 palp (LBM 1430003272); (E) Hp (m process shaded grey) (LBM 1430003272).(F–J) Fabaeformiscandonatora. (F)Male leftvalve,internal view (LBM 1430003279); (G)female leftvalve,internal view(LBM1430003278);(H) maleleftL5 palp(LBM1430003277);(I) male right L5 palp (LBM 1430003277); (J) Hp (m process shaded grey) (LBM 1430003277).(K–O) Fabaeformiscandona myllaina. (K) Male left valve, internal view (LBM 1430003283);(L) female left valve, internal view (LBM 1430003284); (M) male left L5 palp (LBM 1430003282); (N) male right L5 palp (LBM 1430003282); (O) Hp (m process shaded grey) (LBM 1430003282).