Naucoridae

Reynoso-Velasco, Daniel, Sites, Robert W. & Novelo-Gutiérrez, Rodolfo, 2016, The Ambrysus Stål (Heteroptera: Naucoridae: Cryphocricinae) of Mexico: Revision of the subgenus Syncollus La Rivers, Zootaxa 4126 (1) : -

Key to the Subfamilies and Genera of the Naucoridae of Mexico

(modified from Usinger 1941, Polhemus 2008, Mbogho & Sites 2013)

1. Front of head folded posteroventrally...................................... ( Laccocorinae ).... Interocoris La Rivers

1'. Front of head not folded posteroventrally.................................................................. 2

2. Anterior margin of pronotum straight or slightly concave behind interocular space.................................. 3

2'. Anterior margin of pronotum deeply emarginate behind interocular space (e.g., Fig. 3 A)............. ( Cryphocricinae )...4

3. Inner margins of eyes diverging anteriorly; meso- and metasterna with prominent longitudinal carinae............................................................................................ ( Limnocorinae )..... Limnocoris Stål

3'. Inner margins of eyes converging anteriorly; meso- and metasterna without prominent longitudinal carinae............................................................................................ ( Naucorinae ).... Pelocoris Stål

4. Propleura extending mesad to cover posterior portion of prosternum (prosternellum) and contiguous or nearly so at midline ( Figs. 1 A, B); abdominal sternum densely pubescent; fore wing macropterous form................................ 5

4'. Prosternum exposed, without mesal extensions of propleura; abdominal sternum glabrous; fore wing brachypterous and macropterous forms................................................................... Cryphocricos Signoret

5. Body surface covered with scattered granules; eyes distinctly elevated and subglobose; abdominal sternum with wide, lateral glabrous band; meso- and metapretarsal claws large and strongly curved over entire length nearly to semicircle.............................................................................................. Cataractocoris Usinger

5'. Body surface without granules; eyes scarcely elevated above surface of head; abdominal sternum almost entirely pubescent, lateral glabrous band narrow; meso- and metapretarsal claws small with curvature mostly in distal half and never to semicircle.......................................................................................... Ambrysus Stål

Figures

FIGURE 1. Prothorax (ventral view) of specimens in the subgenera Syncollus and Ambrysus. (A) Ambrysus (Syncollus) circumcinctus, (B) Ambrysus (Ambrysus) inflatus. pb = probasisternum, pp = propleuron, ps = prosternellum.

FIGURE 3. Structures of Ambrysus baeus. (A) dorsal habitus of male, (B) 6 th and 7 th abdominal terga of male, (C) 8 th abdominal tergum of male, (D) genital capsule of male (phallosoma removed), (E) ventral side of phallosoma, (F) 6 th abdominal sternum and subgenital plate of female (terminal segments removed). agp = accessory genitalic process, pct = proctiger, pp = pseudoparamere, pr = paramere, pyg = pygophore, rvl = right ventral lobe, sgp = subgenital plate. Size bar = 0. 5 mm and applies only to Figs. D and E.