TABLE 1. Morphological comparison of the species of the M. placidulum species-group. M. ngankeeae sp. nov.M. lepidactyloidesM. feunteuniM. placidulumM. placidumRostrumPost-orbital teeth3–45–75–74–65–7Position of first tooth relative to total cephalothorax length0.23–0.270.47–0.550.24–0.300.29–0.500.41–0.50P2 majorRelative length of dactylus and palm0.63–0.721.27–1.330.66–1.030.55–0.720.82–1.02Relative length of chela and carpus2.38–3.182.37–2.531.57–2.331.64–2.011.82–2.18P2 minorRelative length of dactylus and palm0.97–1.491.75–2.120.85–1.551.0–1.290.85–1.1Ocular beakProminentModerately developedModerately developedAbsent or poorly developedModerately developedFourth thoracic sternitePresence of projectionNo projectionNo projectionNo projectionNo projection

Published as part of Mazancourt, Valentin De, Marquet, Gerard, Wowor, Daisy & Keith, Philippe, 2024, Macrobrachium ngankeeae, a new species of freshwater shrimp (Crustacea: Decapoda: Palaemonidae) from Papua Barat Province, Indonesia, pp. 259 in Zootaxa 5476 (1) on page 259, DOI: 10.11646/zootaxa.5476.1.22, http://zenodo.org/record/12727070