Revue française d'ornithologie

A new genus and new species of the family Camptandriidae Stimpson, 1858, are described from Lower Kinabatangan-Segama Wetlands, Sabah, Malaysia. Exagorium fidelisi, new genus & species, can be distinguished from known camptandriid genera and species by the characters of the carapace, male abdomen and male first gonopod.

Examination of pea crabs, Plenotheres coarctatus (Bürger, 1895) (Decapoda: Pinnotheridae), from mangrove clams, Geloina coaxans (Gmelin, 1791) (Bivalvia: Cyrenidae), collected in Vietnam led to the discovery of a new genus and species of bopyrid parasite. Herein we describe Rhizophoracepon magnagibbus, new genus, new species, females of which are found in the left or right branchial chamber of the pea crab hosts and are distinguished from other pinnotherid bopyrids based on rounded coxal plates with crenulate surfaces and small thin projections, lack of dorsolateral bosses, tergal projections or mid-dorsal projections on the pereomeres, and five pairs of short, subequal digitate biramous pleopods and uniramous lateral plates and uniramous uropods. Males of R. magnagibbus are distinguished based on their slightly tapered pleon with the pleomeres splayed out laterally, mid-ventral tubercles on pleomeres 1–4, and broad, widely separated lobes on the pleotelson. These findings expand on our knowledge of the diversity of these poorly known hyperparasites from pinnotherid crabs, which are symbionts of commercially important bivalves