Metapontonia Bruce, 1967

Ďuriš, Zdeněk & Lin, Chia-Wei, 2016, The ‘ scorpion shrimp’, a new species of the genus Metapontonia (Crustacea: Decapoda: Palaemonidae) from Taiwan, with new generic record from Papua New Guinea, Zootaxa 4138 (3), pp. 474-490 : 475

Genus Metapontonia Bruce, 1967

Generic diagnosis (after Bruce, 1994, modified). Small sized shrimps of subcylindrical or slightly compressed body form. Rostrum short, compressed, lateral carinae oblique or undeveloped. Carapace smooth with acute median tooth over orbits, inferior orbital angle acute, orbit feebly developed posteriorly, supraorbital, epigastric and hepatic spines absent, branchiostegite strongly produced anteriorly and ventromedially. Pleon smooth, dorsal junctions of segments 4–5 and 5–6 widened, membranous, posterior margins of pleurae rounded. Telson with two pairs of dorsal spines and three pairs of posterior spines. Antennules normal, short, ventromedial tooth on basal segment lacking. Antennae with basicerite unarmed, scaphocerite well developed. Epistome with anterior median keel. Mandible without palp, molar process reduced, incisor process expanded; maxillula with bilobed palp, coxal endite reduced; maxilla with slender palp, endites lacking, scaphognathite normal; first maxilliped with slender palp, basal endite normal, coxal endite obsolete, exopod with large caridean lobe, flagellum reduced, short, with plumose terminal setae, epipod large, feebly bilobed; second maxilliped endopod normal, exopod normal with plumose terminal setae, epipod lacking; third maxilliped with endopod short and stout, ischiomerus partly fused to basis, exopod normal with plumose terminal setae, or rudimentary, short and unsetose, coxa with feebly developed lateral plate, arthrobranch absent. Fourth thoracic sternite without median process. First pereiopods normal, fingers simple. Second pereiopods robust, similar, subequal or unequal. Ambulatory pereiopods robust, turned dorsad, dactyls simple, strongly hooked. Uropods normal, exopod with movable distolateral spine only.