In synonymy:
Allepeira Banks, 1932 = Mecynogea Simon, 1903 (Levi, 1968a: 322)
Hentzia McCook, 1894 = Mecynogea Simon, 1903 (Levi, 1968a: 322, together with its replacement name Allepeira)

type Mecynogea bigibba Simon, 1903; gender feminine

N.B.: considered a senior synonym of Allepeira Banks, in Banks, Newport & Bird, 1932: 23 [urn:lsid:nmbe.ch:spidergen:05217] by Levi, 1968a: 322; Allepeira is a replacement name for Hentzia McCook, 1894: 244 [urn:lsid:nmbe.ch:spidergen:05228] (type Epeira basilica McCook, 1878 = Mecynogea lemniscata (Walckenaer, 1841)), preoccupied in Salticidae by Marx, 1883: 26.

Transferred to other genera:
Mecynogea carvalhoi Mello-Leitão, 1944 -- see Argiope
Mecynogea guianensis Mello-Leitão, 1948 -- see Manogea
Mecynogea guyanensis (Keyserling, 1881) -- see Manogea

In synonymy:
Mecynogea affinitata (Kraus, 1955) = Mecynogea lemniscata (Walckenaer, 1841) (Levi, 1980a: 14).
Mecynogea basilica (McCook, 1878) = Mecynogea lemniscata (Walckenaer, 1841) (Archer, 1940: 24, sub Allepeira conferta).
Mecynogea bimucronata (Mello-Leitão, 1936, T from Gea) = Mecynogea erythromela (Holmberg, 1876) (Levi, 1997: 224).
Mecynogea bituberculata (Mello-Leitão, 1939, T from Mangora) = Mecynogea erythromela (Holmberg, 1876) (Levi, 1997: 225).
Mecynogea chavona Levi, 1997 = Mecynogea infelix (Soares & Camargo, 1948) (Martins & Santos, 2018: 425).
Mecynogea conferta (Hentz, 1850) = Mecynogea lemniscata (Walckenaer, 1841) (Chamberlin & Ivie, 1944: 93, sub Allepeira).
Mecynogea trivittata (O. Pickard-Cambridge, 1889) = Mecynogea lemniscata (Walckenaer, 1841) (Levi, 1997: 228).
Mecynogea tucumana Simon, 1903 = Mecynogea erythromela (Holmberg, 1876) (Levi, 1997: 224).
Mecynogea wiedenmeyeri (Schenkel, 1953, T from Gea) = Mecynogea lemniscata (Walckenaer, 1841) (Levi, 1997: 228).

Mecynogea apatzingan Levi, 1997: 232, f. 67-72 (Dmf).

Mecynogea bigibba Simon, 1903d: 25 (Df).
Mecynogea bigibba Levi, 1997: 222, f. 1-25 (f, Dm, S of M. infelix, rejected by Martins & Santos, 2018: 424).

Mecynogea buique Levi, 1997: 229, f. 55-58 (Df).
Mecynogea buique Martins & Santos, 2018: 433, f. 9A-D, 10A-B, 11A-C, 12A-D, 13A-D, 14B (Dm, f).

Zilla erythromela Holmberg, 1876: 15 (Df).
Mecynogea tucumana Simon, 1903d: 25 (Df) [urn:lsid:nmbe.ch:spidersp:059954].
Mecynogea erythromela Mello-Leitão, 1933b: 33.
Gea bimucronata Mello-Leitão, 1936d: 125, pl. 14 (Df) [urn:lsid:nmbe.ch:spidersp:059950].
Mangora bituberculata Mello-Leitão, 1939e: 63, f. 34-37 (Dmf) [urn:lsid:nmbe.ch:spidersp:059951].
Mecynogea tucumana Mello-Leitão, 1941d: 145, f. 41-43 (f, Dm).
Mecynogea erythromela Levi, 1997: 224, f. 26-33 (mf, removed from S of Alpaida leucogramma, contra Mello-Leitão, 1944b: 321 [sub Parepeira albostriata], S of Gea bimucronata, Mangora bituberculata and Mecynogea tucumana).

Wixia infelix Soares & Camargo, 1948a: 378, f. 35 (Df).
Mecynogea infelix Levi, 1993b: 56 (Tf from Wixia).
Mecynogea chavona Levi, 1997: 230, f. 65-66 (Dm) [urn:lsid:nmbe.ch:spidersp:016396].
Mecynogea bigibba Levi, 1997: 222, f. 10-14 (in part, some f, misident. per Martins & Santos, 2018: 425).
Mecynogea lemniscata Levi, 1997: 227, f. 46-48 (in part, some f, misident. per Martins & Santos, 2018: 425).
Mecynogea infelix Martins & Santos, 2018: 424, f. 1A-D, 2A-C, 3A-B, 4A-E, 5A-D, 6A-H, 7A-F, 8A-D, 14A (mf, removed from S of M. bigibba, contra Levi, 1997: 222; S of M. chavona).

Linyphia lemniscata Walckenaer, 1841: 263 (Df).
Linyphia conferta Hentz, 1850: 30, pl. 4, f. 7 (Df) [urn:lsid:nmbe.ch:spidersp:059952].
Epeira basilica McCook, 1878a: 133, f. 1-3 (Df) [urn:lsid:nmbe.ch:spidersp:059949].
Argiope trivittata O. Pickard-Cambridge, 1889d: 51, pl. 4, f. 5-6 (Dmf) [urn:lsid:nmbe.ch:spidersp:059953].
Argiope basilica Marx, 1890a: 541.
Hentzia basilica McCook, 1894: 244, pl. 14, f. 2, pl. 23, f. 8 (f).
Cyrtophora basilica Simon, 1895a: 771.
Hentzia trivittata F. O. Pickard-Cambridge, 1904: 523, pl. 51, f. 12-13 (mf).
Allepeira basilica Banks, Newport & Bird, 1932: 23.
Allepeira conferta Archer, 1940: 24 (T from Linyphia, S of Allepeira basilica).
Allepeira lemniscata Chamberlin & Ivie, 1944: 93 (T from Linyphia, S of Allepeira conferta).
Allepeira lemniscata Exline, 1949: 311, f. 1-13 (mf).
Gea wiedenmeyeri Schenkel, 1953a: 17, f. 15a-b (Df) [urn:lsid:nmbe.ch:spidersp:059955].
Allepeira affinitata Kraus, 1955b: 26, f. 54-56 (Dmf) [urn:lsid:nmbe.ch:spidersp:059948].
Allepeira lemniscata Wiehle, 1967b: 195, f. 53 (f).
Mecynogea lemniscata Levi, 1980a: 13, f. 1-15 (mf, S of Allepeira affinitata).
Mecynogea affinitata Brignoli, 1983c: 274.
Mecynogea lemniscata Roth, 1985: B6-4, f. 19-20, 78-79 (mf).
Mecynogea lemniscata Breene et al., 1993: 105, f. 158A-C (mf).
Mecynogea lemniscata Levi, 1997: 228, f. 40-54 (mf, S of Gea wiedenmeyeri and Mecynogea trivittata).
Mecynogea lemniscata Levi, 2002: 553, f. 239-240 (m).
Mecynogea lemniscata Martins & Santos, 2018: 440, f. 14C-D (m).

Allepeira martiana Archer, 1958: 6, f. 12-13, 26 (Dmf).
Mecynogea martiana Brignoli, 1983c: 274.
Mecynogea martiana Levi, 1997: 232, f. 73-78 (mf).

Mecynogea ocosingo Levi, 1997: 230, f. 59-64 (Dmf).

Mecynogea sucre Levi, 1997: 228, f. 34-39 (Dmf).