| | Family | Subfamily | Genus | Subgenus | Species | Source | | Arrenuridae | | Arrenurus | Megaluracarus | maria | SMIT 1999 |
| Arrenuridae | | Arrenurus | Arrenurus | marionae | WILES 1993 |
| Arrenuridae | | Arrenurus | Arrhenuropsis | mexicanus | CRAMER & COOK 1992 |
| Arrenuridae | | Arrenurus | Arrenurus | meyerae | WILES 1993 |
| Arrenuridae | | Arrenurus | Truncaturus | micropetiolatus | JIN & WILES 1996 [preocc.] |
| Arrenuridae | | Arrenurus | Megaluracarus | neuquenensis | ROSSO DE FERRADAS 1987 |
| Arrenuridae | | Arrenurus | Arrenurus | ortali | SMIT 2000 |
| Arrenuridae | | Arrenurus | ? | pennapodus | ROSSO DE FERRADAS 1989 |
| Arrenuridae | | Arrenurus | Micruracarus | perplexus | SMIT 1999 |
| Arrenuridae | | Arrenurus | Micruracarus | purpureus | SMIT 1997 |
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