Nepa pfeiferiae Ferrari, 1888 Laccotrephes pfeiferiae is a species of water scorpion belonging to the family Nepidae.

[1][2] It was until 1999 considered synonym of Laccotrephes robustus; records of L. robustus outside the Philippines refer to this species.

[2] Laccotrephes pfeiferiae can reach a length of about 45–50 millimetres (1.8–2.0 in).

A breathing tube, up to 32–35 millimetres (1.3–1.4 in), located at the end of an elongated abdomen, can be kept out of the water to breathe.

[3] This species can be found in Myanmar, Thailand, West Malaysia, Indonesia (Sumatra, Java), southern China, and Taiwan.