In synonymy:
Haplopelma Simon, 1892 = Cyriopagopus Simon, 1887 (Smith & Jacobi, 2015: 28)
Melognathus Chamberlin, 1917 = Cyriopagopus Simon, 1887 (Raven, 1985a: 156)

type Cyriopagopus paganus Simon, 1887; gender masculine

N.B.: The syllable -pagopus was formed from ancient Greek, means "frost foot" or "ice foot" and is masculine in gender (Tobias Joho, Institute of Classical Philology, University of Bern, Switzerland). Considered a senior synonym of Melognathus Chamberlin, 1917 by Raven, 1985a: 156, and of Haplopelma Simon, 1892 by Smith & Jacobi, 2015: 28 [urn:lsid:nmbe.ch:spidergen:00229] (type Selenocosmia doriae Thorell, 1890). Melognathus revalidated by Gabriel & Sherwood, 2019c: 145. Haplopelma considered a senior synonym of Melopoeus Pocock, 1895 by Raven, 1985a: 116 (but see also Schmidt, 2010b, who considered the type species a member of Ornithoctonus Pocock, 1892 and therefore considered Melopoeus the earliest available name for the remaining species, and Schmidt, 2015b, who removed Melopoeus from the synonymy with Haplopelma. Haplopelma, Cyriopagopus, Melopoeus and other "ornithoctonine" genera are in urgent need of revision (e.g. Hauke, 2017: 48). Genus transfers and synonymies without thorough analysis and without including the type species will not be taken over.

Transferred to other genera:
Cyriopagopus dromeus (Chamberlin, 1917) -- see Melognathus
Cyriopagopus schioedtei (Thorell, 1891) -- see Omothymus
Cyriopagopus thorelli (Simon, 1901) -- see Omothymus

In synonymy:
Cyriopagopus huwenus (Wang, Peng & Xie, 1993) = Cyriopagopus schmidti (von Wirth, 1991) (Zhu & Zhang, 2008: 420).

Nomina dubia:
Cyriopagopus robustus (Strand, 1907l: 70, f, Singapore, originally in Haplopelma) [urn:lsid:nmbe.ch:spidersp:002051] -- Nentwig et al., 2020: 26, T from Haplopelma by Smith & Jacobi, 2015: 47.
Cyriopagopus salangensis (Strand, 1907l: 67, f, Malaysia, originally in Melopoeus) [urn:lsid:nmbe.ch:spidersp:002052] -- Nentwig et al., 2020: 26, T from Haplopelma by Smith & Jacobi, 2015: 47.

Selenocosmia albostriata Simon, 1886a: 161 (Dmf).
Melopoeus albostriatus Pocock, 1895a: 180.
Melopoeus albostriatus Simon, 1903a: 945, f. 1089-1091 (m).
Melopoeus albostriatus Simon, 1904b: 270, pl. 16, f. 1 (mf).
Melopoeus albostriatus Schmidt, 1986: 73, f. 128-130 (m).
Melopoeus albostriatus Smith, 1987c: 10, f. 1-15 (m).
Haplopelma albostriatum Smith, 1996: 25, f. 27-36 (m).
Haplopelma albostriatum Peters, 2000b: 15, f. 19-20 (m).
Cyriopagopus albostriatum Smith & Jacobi, 2015: 47 (T from Haplopelma).

Selenocosmia doriae Thorell, 1890a: 397 (Df).
Haplopelma doriae Simon, 1892a: 151 (T from Selenocosmia).
Haplopelma doriae Simon, 1903a: 946, f. 1092.
Haplopelma doriae Schmidt, 1998a: 2, f. 2 (f).
Haplopelma doriae Schmidt, 2003l: 250, f. 813-814 (f).
Ornithoctonus doriae Schmidt, 2010b: 30, f. 4.1-4.2 (f; generic placement not supported by investigation of type specimen of that genus).
Haplopelma doriae Hauke, 2012: 4, f. 1-4, 10, 17 (f).
Cyriopagopus doriae Smith & Jacobi, 2015: 47 (T from Haplopelma).
Ornithoctonus doriae Schmidt, 2015b: 25, f. 3 (f).
Haplopelma doriae Hauke, 2017: 7, f. 2, 6a, 7a, 9, 12d (f).

Selenocosmia hainana Liang et al., 1999: 300, f. 1-4 (Df).
Ornithoctonus hainana Zhu, Song & Li, 2001: 1, f. 1-7 (Tf from Selenocosmia, Dm).
Haplopelma hainanum Schmidt, 2003l: 250, f. 815-817 (mf).
Selenocosmia hainana Chen et al., 2004: 607, f. 5-10 (m).
Haplopelma hainanum von Wirth & Striffler, 2005: 17 (Tmf from Ornithoctonus).
Haplopelma hainanum Zhu & Zhang, 2008: 427, f. 2A-G, 10 (mf).
Cyriopagopus hainanum Smith & Jacobi, 2015: 47 (T from Haplopelma).
Haplopelma hainanum Hauke, 2017: 7, f. 4a-b, 6c, 7b (f).
Cyriopagopus hainanum Zhang & Wang, 2017: 755, 5 f. (mf).

Haplopelma lividum Smith, 1996: 22, f. 1-14 (Dmf).
Haplopelma lividum Peters, 2000b: 17, f. 28, 30-31 (mf).
Haplopelma lividum Schmidt, 2003l: 250, f. 818-819 (mf).
Haplopelma lividum Hauke & von Wirth, 2013: 13, f. 2, 11, 13, 25 (f [no genitalia]).
Cyriopagopus lividum Smith & Jacobi, 2015: 47 (T from Haplopelma).
Haplopelma lividum Hauke & von Wirth, 2015: 14, f. 2, 11, 13, 25 (f [no genitalia]).
Haplopelma lividum Hauke, 2017: 17, f. 3a-b, 8b, 38a-d (mf [no genitalia]).

Haplopelma longipes von Wirth & Striffler, 2005: 17, f. 19-29 (Dmf).
Haplopelma longipes Schmidt, 2006c: 9, f. 2 (f).
Haplopelma longipes Hauke & von Wirth, 2013: 12, f. 1, 3-4, 6, 8-10, 12, 23-24 (f).
Cyriopagopus longipes Smith & Jacobi, 2015: 47 (T from Haplopelma).
Haplopelma longipes Hauke & von Wirth, 2015: 44, f. 1, 3-4, 6, 8-10, 12, 18, 23-24, 26 (f).
Haplopelma longipes Hauke, 2017: 7, f. 6b, 21a (f).

Melopoeus minax Thorell, 1897a: 182 (Df).
Ornithoctonus minax Gravely, 1935b: 211, f. a-c (Dm).
Melopoeus minax Hancock & Hancock, 1989: 48, f. 43 (f).
Haplopelma minax Smith, 1996: 24, f. 15-26 (m).
Haplopelma minax Peters, 2000b: 18, f. 32C-E (mf).
Haplopelma minax Schmidt, 2003l: 250, f. 820-821 (m).
Cyriopagopus minax Smith & Jacobi, 2015: 47 (T from Haplopelma).

Cyriopagopus paganus Simon, 1887i: 111 (Df).

Haplopelma schmidti Wirth, 1991b: 7, f. 1-11 (Df).
Selenocosmia huwena Wang, Peng & Xie, 1993: 72, f. 1-4 (Df, not m, per Song, Zhu & Chen, 1999: 41) [urn:lsid:nmbe.ch:spidersp:002414].
Haplopelma schmidti Schmidt, 1993d: 122, f. 386, 393 (f).
Selenocosmia huwena Yin & Bao, 1995b: 131, f. 1-9 (Dm).
Selenocosmia huwena Song, Zhu & Chen, 1999: 40, f. 17N-P (mf).
Selenocosmia huwena Peters, 1999: 7, f. 1, 4 (f).
Haplopelma schmidti Peters, 1999: 11, f. 2-3 (f).
Ornithoctonus huwena Zhu & Song, 2000a: 54, f. 1-16 (Tmf from Selenocosmia).
Haplopelma schmidti Peters, 2000b: 19, f. 35 (f).
Selenocosmia huwena Zhang, 2000b: 22, f. 1.1-7 (mf).
Ornithoctonus huwena Peters, 2000b: 59, f. 157-159 (mf).
Ornithoctonus huwena Chen et al., 2003: 70, f. 8 (m).
Haplopelma schmidti Schmidt, 2003l: 250, f. 822-825 (mf).
Haplopelma huwenum von Wirth & Striffler, 2005: 17 (Tmf from Ornithoctonus).
Haplopelma schmidti Zhu & Zhang, 2008: 429, f. 3A-K, 13-14 (f, Sm).
Haplopelma schmidti Schmidt, 2010a: 23, f. 3.1-4 (f).
Cyriopagopus schmidti Smith & Jacobi, 2015: 47 (T from Haplopelma).
Melopoeus schmidti Schmidt, 2015b: 27, f. 2 (f).
Haplopelma schmidti Hauke, 2017: 7, f. 6d (f).

Haplopelma vonwirthi Schmidt, 2005a: 5, f. 1-3 (f, nomen nudum, no type depository; probably misidentified H. minax per von Wirth & Striffler, 2005).
Haplopelma vonwirthi Peters, 2005b: 72, f. 235-241 (f, f. m).
Haplopelma vonwirthi Schmidt, 2005g: 24, f. 1-3 (Df).
Haplopelma volkervonwirthi Schmidt, 2006a: 7, f. 1-3 (Dm, superfluous replacement name).
Haplopelma volkervonwirthi Schmidt, 2006c: 9, f. 1 (f).
Cyriopagopus vonwirthi Smith & Jacobi, 2015: 47 (T from Haplopelma).