FIGURE 19 in Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea)

FIGURE 19. Species of Megaesthesius and Alainthesius n. gen. A, B, Megaesthesius sagedae, Singapore: male 2.5 × 3.0 mm (ZRC 1995.883); C‒F, Megaesthesius yokoyai (after Takeda & Miyake 1969a: figs. 3a, 4f, 4a, 4e, respectively); G‒L, Alainthesius signatus n. sp., Madagascar: holotype male 2.5 × 3.3 mm (MNHN-IU-2013-9472) (after Crosnier 1975: fig. 1a, 1k, 1j, 1b, 1c, 1i, respectively); M‒R, Megaesthesius westralia, Australia: holotype male 3.4 × 3.8 mm (after Davie 2013: figs. 1A, B, 2A, D, E, 3E); S, W, Megaesthesius sagedae, Singapore: male 2.5 × 3.0 mm (ZRC 1995.885); T, X, Megaesthesius migmus n. sp., Philippines: holotype male 4.4 × 4.9 mm (NMCR); U, Y, Alainthesius bertrandi n. sp., New Caledonia: holotype male 3.3 × 4.1 mm (MNHN-IU-2013-9073); V, Alainthesius bertrandi n. sp., Papua New Guinea: female 5.6 × 6.9 mm (MNHN-IU-2013-9012). A, overall habitus; B, C, G, M, dorsal view of carapace; E, left P4; F, I, frontal view of cephalothorax; H, O, frontal and anterolateral margin of carapace; N, ventral view of cephalothorax; J, right P3; K, buccal cavity and posterior margin of epistome; Q, right P4; R, right P5; D, L, P, male pleon; S‒V, posterior margin of epistome; W‒Y, left thoracic sternites 7 and 8, "supplementary plate", penis tube and penis. Abbreviations: cx4 = coxa of P4; cx5 = coxa of P5; p = penis; pt = calcified penis tube; sp = "supplementary plate"; st7 = thoracic sternite 7; st8 = thoracic sternite 8.