caeruleus, Stiphodon Parenti [L. R.] & Maciolek [J. A.] 1993:966, Figs. 5C, 13-14 [Bulletin of Marine Science v. 53 (no. 3); ref. 21279] 4th tributary of Nanpil-Kiepw River, Ponape/Pohnpei, eastern Caroline Islands (Federated States of Micronesia). Holotype: CAS 67350. Paratypes: BPBM 35017 [ex CAS 67316] (8); CAS 67316 (74, 4 c&s), 67318 (32), 67320-21 (5, 20), 67327-28 (31, 15), 67330-33 (21, 19, 3, 24), 67336 (4), 67344-49 (6), 67351-54 (4), 67355-57 (3), 67443 (16), 67449 (10), 77368 [ex CAS 67491] (1); ROM 64672 [ex CAS 67316] (4); USNM 223007 (28), 322471 [ex CAS 67316] (8). •Valid as Stiphodon caeruleus Parenti & Maciolek 1993 -- (Watson 1996:114 [ref. 22688], Larson & Murdy 2001:3603 [ref. 26293], Chabarria et al. 2014:23 [ref. 33324], Keith et al. 2015:186 [ref. 34328], Parenti 2021:426 [ref. 38603]). Current status: Valid as Stiphodon caeruleus Parenti & Maciolek 1993. Oxudercidae: Sicydiinae. Distribution: Western Pacific: Pohnpei (Federated States of Micronesia) endemic [amphidromous]. Habitat: freshwater, brackish, marine.