|   | 
|  Kingdom Animalia | 
|   | 
Gelastocoris amazonensis Melin, 1929 – valid
 | 
|   | 
Gelastocoris andinus Melin, 1929 – valid
 | 
|   | 
Gelastocoris andinus peruensis Melin, 1929 – invalid
 | 
|   | 
Gelastocoris angulatus (Melin, 1929) – invalid
 | 
|   | 
Gelastocoris apureensis Melin, 1929 – valid
 | 
|   | 
Gelastocoris californiensis Melin, 1929 – invalid
 | 
|   | 
Gelastocoris hungerfordi Melin, 1929 – valid
 | 
|   | 
Gelastocoris peruensis Melin, 1929 – valid
 | 
|   | 
Mononyx amplicollis ecuadorensis Melin, 1929 – invalid
 | 
|   | 
Mononyx ater Melin, 1929 – invalid
 | 
|   | 
Mononyx bipunctatus Melin, 1929 – invalid
 | 
|   | 
Mononyx borealis Melin, 1929 – invalid
 | 
|   | 
Mononyx mexicanus Melin, 1929 – invalid
 | 
|   | 
Mononyx montandoni Melin, 1929 – invalid
 | 
|   | 
Mononyx niger Melin, 1929 – invalid
 | 
|   | 
Mononyx obscurus Melin, 1929 – invalid
 | 
|   | 
Mononyx planifrons Melin, 1929 – invalid
 | 
|   | 
Mononyx quinquedentatus Melin, 1929 – invalid
 | 
|   | 
Mononyx unicornis Melin, 1929 – invalid
 | 
|   | 
Montandonius Melin, 1929 – valid
 | 
|   | 
Montandonius angulatus Melin, 1929 – valid
 | 
|   | 
Nerthra ater (Melin, 1929) – valid
 | 
|   | 
Nerthra borealis (Melin, 1929) – valid
 | 
|   | 
Nerthra ecuadorensis (Melin, 1929) – valid
 | 
|   | 
Nerthra mexicana (Melin, 1929) – valid
 | 
|   | 
Nerthra montandoni (Melin, 1929) – valid
 | 
|   | 
Nerthra planifrons (Melin, 1929) – valid
 | 
|   | 
Nerthra quinquedentata (Melin, 1929) – valid
 | 
|   | 
Nerthra rudis (Melin, 1929) – invalid
 | 
|   | 
Nerthra unicornis (Melin, 1929) – valid
 | 
|   | 
Phintius stali Melin, 1929 – invalid | 
        
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