In synonymy:
Achaea O. Pickard-Cambridge, 1882 = Achaearanea Strand, 1929 (Strand, 1929: 6, preoccupied, replacement name)

type Achaea insignis O. Pickard-Cambridge, 1882; gender feminine; syn. of Achaearanea trapezoidalis (Taczanowski, 1873)

N.B.: replacement name for Achaea O. Pickard-Cambridge, 1882c: 428 [urn:lsid:nmbe.ch:spidergen:05311], preoccupied in Lepidoptera by Hübner, 1823; possibly polyphyletic (Forster, Platnick & Coddington, 1990: 114); not a senior synonym of Parasteatoda Archer, 1946 (Saaristo, 2006: 69, contra Levi, 1995a: 6), or of Cryptachaea Archer, 1946 or Hentziectypus Archer, 1946 (Yoshida, 2008: 38, contra Levi, 1955a: 6).

Transferred to other genera:
Achaearanea acoreensis (Berland, 1932) -- see Cryptachaea
Achaearanea alacris (Keyserling, 1884) -- see Cryptachaea
Achaearanea altiventer (Keyserling, 1884) -- see Cryptachaea
Achaearanea ambera Levi, 1963 -- see Cryptachaea
Achaearanea analista Levi, 1963 -- see Cryptachaea
Achaearanea anastema Levi, 1963 -- see Cryptachaea
Achaearanea angulithorax (Bösenberg & Strand, 1906) -- see Parasteatoda
Achaearanea anna Levi, 1959 -- see Hentziectypus
Achaearanea apex Levi, 1959 -- see Hentziectypus
Achaearanea asiatica (Bösenberg & Strand, 1906) -- see Parasteatoda
Achaearanea azteca (Chamberlin & Ivie, 1936) -- see Cryptachaea
Achaearanea banosensis Levi, 1963 -- see Cryptachaea
Achaearanea barra Levi, 1963 -- see Cryptachaea
Achaearanea bellula (Keyserling, 1891) -- see Cryptachaea
Achaearanea bentifica (Keyserling, 1891) -- see Cryptachaea
Achaearanea blattea (Urquhart, 1886) -- see Cryptachaea
Achaearanea boqueronica (Kraus, 1955) -- see Parasteatoda
Achaearanea brookesiana Barrion & Litsinger, 1995 -- see Parasteatoda
Achaearanea caboverdensis Schmidt & Piepho, 1994 -- see Paidiscura
Achaearanea caliensis Levi, 1963 -- see Cryptachaea
Achaearanea cambridgei (Petrunkevitch, 1911) -- see Chrysso
Achaearanea campanulata Chen, 1993 -- see Campanicola
Achaearanea camura (Simon, 1877) -- see Parasteatoda
Achaearanea canionis (Chamberlin & Gertsch, 1929) -- see Cryptachaea
Achaearanea caqueza Levi, 1963 -- see Cryptachaea
Achaearanea catapetraea (Gertsch & Archer, 1942) -- see Cryptachaea
Achaearanea celsabdomina Zhu, 1998 -- see Parasteatoda
Achaearanea chilensis Levi, 1963 -- see Cryptachaea
Achaearanea chiricahua Levi, 1955 -- see Cryptachaea
Achaearanea cingulata Zhu, 1998 -- see Parasteatoda
Achaearanea cinnabarina Levi, 1963 -- see Cryptachaea
Achaearanea conigera (Simon, 1914) -- see Achaeridion
Achaearanea conjuncta (Gertsch & Mulaik, 1936) -- see Hentziectypus
Achaearanea credula (Gertsch & Davis, 1936) -- see Hentziectypus
Achaearanea crocea (O. Pickard-Cambridge, 1896) -- see Dipoena
Achaearanea culicivora (Bösenberg & Strand, 1906) -- see Parasteatoda
Achaearanea dalana Buckup & Marques, 1991 -- see Cryptachaea
Achaearanea daliensis Zhu, 1998 -- see Parasteatoda
Achaearanea dea Buckup & Marques, 2006 -- see Cryptachaea
Achaearanea decorata (L. Koch, 1867) -- see Parasteatoda
Achaearanea diamantina Levi, 1963 -- see Cryptachaea
Achaearanea digitus Buckup & Marques, 2006 -- see Cryptachaea
Achaearanea dromedaria (Simon, 1880) -- see Paidiscura
Achaearanea dromedariformis (Roewer, 1942) -- see Cryptachaea
Achaearanea ducta Zhu, 1998 -- see Parasteatoda
Achaearanea eramus Levi, 1963 -- see Cryptachaea
Achaearanea extrilida (Keyserling, 1890) -- see Cryptachaea
Achaearanea ferrumequina (Bösenberg & Strand, 1906) -- see Campanicola
Achaearanea florendida Levi, 1959 -- see Hentziectypus
Achaearanea florens (O. Pickard-Cambridge, 1896) -- see Hentziectypus
Achaearanea fordum luctuosa (Caporiacco, 1954) -- see Cryptachaea
Achaearanea fresno Levi, 1955 -- see Cryptachaea
Achaearanea galeiforma Zhu, Zhang & Xu, 1991 -- see Parasteatoda
Achaearanea geochares Levi, 1955 -- see Cryptachaea
Achaearanea gibberosa (Kulczyński, 1899) -- see Echinotheridion
Achaearanea gigantea (Keyserling, 1884) -- see Cryptachaea
Achaearanea globosa (Hentz, 1850) -- see Hentziectypus
Achaearanea guadalupensis (Keyserling, 1884) -- see Cryptachaea
Achaearanea gui Zhu, 1998 -- see Parasteatoda
Achaearanea hammeni Chrysanthus, 1963 -- see Parasteatoda
Achaearanea herbigrada (Simon, 1873) -- see Neottiura
Achaearanea hermosillo Levi, 1959 -- see Hentziectypus
Achaearanea hirta (Taczanowski, 1873) -- see Cryptachaea
Achaearanea ignota (Keyserling, 1884) -- see Cryptachaea
Achaearanea index (Chamberlin & Ivie, 1944) -- see Coleosoma
Achaearanea inops Levi, 1963 -- see Cryptachaea
Achaearanea insulsa (Gertsch & Mulaik, 1936) -- see Cryptachaea
Achaearanea isana Levi, 1963 -- see Cryptachaea
Achaearanea japonica (Bösenberg & Strand, 1906) -- see Nihonhimea
Achaearanea jequirituba Levi, 1963 -- see Cryptachaea
Achaearanea jinghongensis Zhu, 1998 -- see Parasteatoda
Achaearanea kaindi Levi, Lubin & Robinson, 1982 -- see Parasteatoda
Achaearanea kaspi Levi, 1963 -- see Cryptachaea
Achaearanea koepckei Levi, 1963 -- see Cryptachaea
Achaearanea kompirensis (Bösenberg & Strand, 1906) -- see Parasteatoda
Achaearanea krausi Chrysanthus, 1963 -- see Parasteatoda
Achaearanea labarda Roberts, 1983 -- see Bardala
Achaearanea lanyuensis Yoshida, Tso & Severinghaus, 2000 -- see Parasteatoda
Achaearanea leguiai (Chamberlin, 1916) -- see Theridion
Achaearanea liaoyuanensis Zhu & Yu, 1982 -- see Theridion
Achaearanea longiducta Zhu, 1998 -- see Parasteatoda
Achaearanea lota Levi, 1963 -- see Cryptachaea
Achaearanea luculenta (Bryant, 1940) -- see Chrysso
Achaearanea lunata (Clerck, 1757) -- see Parasteatoda
Achaearanea lunata (Olivier, 1789) -- see Parasteatoda
Achaearanea lunata serrata (Franganillo, 1930) -- see Parasteatoda
Achaearanea manzanillo Levi, 1959 -- see Cryptachaea
Achaearanea maraca Buckup & Marques, 1991 -- see Cryptachaea
Achaearanea maronica (Caporiacco, 1954) -- see Cryptachaea
Achaearanea maxima (Keyserling, 1891) -- see Cryptachaea
Achaearanea mea (Bösenberg & Strand, 1906) -- see Campanicola
Achaearanea mendax (O. Pickard-Cambridge, 1899) -- see Hentziectypus
Achaearanea meraukensis Chrysanthus, 1963 -- see Cryptachaea
Achaearanea mesax Levi, 1959 -- see Parasteatoda
Achaearanea migrans (Keyserling, 1884) -- see Cryptachaea
Achaearanea milagro Levi, 1963 -- see Cryptachaea
Achaearanea mundula (L. Koch, 1872) -- see Nihonhimea
Achaearanea nayaritensis Levi, 1959 -- see Cryptachaea
Achaearanea nigrovittata (Keyserling, 1884) -- see Parasteatoda
Achaearanea nipponica Yoshida, 1983 -- see Parasteatoda
Achaearanea nordica (Chamberlin & Ivie, 1947) -- see Chrysso
Achaearanea oblivia (O. Pickard-Cambridge, 1896) -- see Cryptachaea
Achaearanea obnubila (Keyserling, 1891) -- see Parasteatoda
Achaearanea oculiprominens (Saito, 1939) -- see Keijiella
Achaearanea ohlerti (Thorell, 1870) -- see Theridion
Achaearanea orana Levi, 1963 -- see Cryptachaea
Achaearanea orgea Levi, 1967 -- see Theridion
Achaearanea oxymaculata Zhu, 1998 -- see Parasteatoda
Achaearanea palgongensis Seo, 1993 -- see Keijiella
Achaearanea pallida (Walckenaer, 1841) -- see Parasteatoda
Achaearanea pallipera Levi, 1963 -- see Cryptachaea
Achaearanea pallipes (Keyserling, 1891) -- see Cryptachaea
Achaearanea parana Levi, 1963 -- see Cryptachaea
Achaearanea passiva (Keyserling, 1891) -- see Cryptachaea
Achaearanea picadoi (Banks, 1909) -- see Parasteatoda
Achaearanea pilaton Levi, 1963 -- see Cryptachaea
Achaearanea pinguis (Keyserling, 1886) -- see Cryptachaea
Achaearanea polygramma (Kulczyński, 1911) -- see Parasteatoda
Achaearanea porteri (Banks, 1896) -- see Cryptachaea
Achaearanea portoricensis (Petrunkevitch, 1930) -- see Cryptachaea
Achaearanea projectivulva Yoshida, 2001 -- see Cryptachaea
Achaearanea pura (O. Pickard-Cambridge, 1894) -- see Cryptachaea
Achaearanea pusillana (Roewer, 1942) -- see Cryptachaea
Achaearanea pydanieli Buckup & Marques, 1991 -- see Cryptachaea
Achaearanea quadrimaculata Yoshida, Tso & Severinghaus, 2000 -- see Parasteatoda
Achaearanea quadripartita (Keyserling, 1891) -- see Theridion
Achaearanea rafaeli Buckup & Marques, 1991 -- see Hentziectypus
Achaearanea rapa Levi, 1963 -- see Cryptachaea
Achaearanea redempta (Gertsch & Mulaik, 1936) -- see Cryptachaea
Achaearanea rioensis Levi, 1963 -- see Cryptachaea
Achaearanea riparia (Blackwall, 1834) -- see Cryptachaea
Achaearanea rostra Zhu & Zhang, 1992 -- see Cryptachaea
Achaearanea rostrata (O. Pickard-Cambridge, 1896) -- see Cryptachaea
Achaearanea rupicola (Emerton, 1882) -- see Cryptachaea
Achaearanea ryukyu Yoshida, 2000 -- see Parasteatoda
Achaearanea salvadorensis (Kraus, 1955) -- see Cryptachaea
Achaearanea saxatilis (C. L. Koch, 1835) -- see Cryptachaea
Achaearanea schneirlai Levi, 1959 -- see Cryptachaea
Achaearanea schraderorum Levi, 1959 -- see Cryptachaea
Achaearanea schullei (Gertsch & Mulaik, 1936) -- see Hentziectypus
Achaearanea serax Levi, 1959 -- see Hentziectypus
Achaearanea serenoae (Gertsch & Archer, 1942) -- see Cryptachaea
Achaearanea serica (Urquhart, 1886) -- see Steatoda
Achaearanea sicki Levi, 1963 -- see Cryptachaea
Achaearanea simulans (Thorell, 1875) -- see Parasteatoda
Achaearanea simulata (Emerton, 1926) -- see Theridion
Achaearanea songi Zhu, 1998 -- see Parasteatoda
Achaearanea subtabulata Zhu, 1998 -- see Parasteatoda
Achaearanea subvexa Zhu, 1998 -- see Parasteatoda
Achaearanea tabulata Levi, 1980 -- see Parasteatoda
Achaearanea taeniata (Keyserling, 1884) -- see Cryptachaea
Achaearanea taim Buckup & Marques, 2006 -- see Cryptachaea
Achaearanea teja Levi, 1967 -- see Cryptachaea
Achaearanea tepidariorum (C. L. Koch, 1841) -- see Parasteatoda
Achaearanea terex Levi, 1959 -- see Parasteatoda
Achaearanea tesselata (Keyserling, 1884) -- see Nihonhimea
Achaearanea tovarensis Levi, 1963 -- see Cryptachaea
Achaearanea transipora (Zhu & Zhang, 1992) -- see Parasteatoda
Achaearanea triangula Yoshida, 1993 -- see Parasteatoda
Achaearanea triguttata (Keyserling, 1891) -- see Cryptachaea
Achaearanea trinidensis Levi, 1959 -- see Cryptachaea
Achaearanea turquino Levi, 1959 -- see Hentziectypus
Achaearanea umbratica (L. Koch, 1872) -- see Theridion
Achaearanea undata (Keyserling, 1884) -- see Cryptachaea
Achaearanea ungilensis Kim & Kim, 1996 -- see Parasteatoda
Achaearanea uviana Levi, 1963 -- see Cryptachaea
Achaearanea valoka Chrysanthus, 1975 -- see Parasteatoda
Achaearanea veruculata (Urquhart, 1886) -- see Cryptachaea
Achaearanea vervoorti Chrysanthus, 1975 -- see Parasteatoda
Achaearanea vivida (Keyserling, 1891) -- see Cryptachaea
Achaearanea wau Levi, Lubin & Robinson, 1982 -- see Parasteatoda
Achaearanea xinjiangensis Hu & Wu, 1989 -- see Heterotheridion
Achaearanea zonensis Levi, 1959 -- see Cryptachaea

In synonymy:
Achaearanea diversa (O. Pickard-Cambridge, 1882, T from Thwaitesia) = Achaearanea trapezoidalis (Taczanowski, 1873) (Keyserling, 1884a: 102, sub Achaea).
Achaearanea insignis (O. Pickard-Cambridge, 1882) = Achaearanea trapezoidalis (Taczanowski, 1873) (Keyserling, 1884a: 102, sub Achaea).
Achaearanea pentagona (Caporiacco, 1954) = Achaearanea hieroglyphica (Mello-Leitão, 1940) (Levi, 1967b: 22).

Homonym replaced:
Achaearanea globosa Patel, 2003 -- see Achaearanea triangularis

Nomen dubium:
Achaearanea quadripunctata (Simon, 1895g: 145, m, Brazil, originally in Achaea) -- Levi, 1963b: 194.

Achaearanea alboinsignita Locket, 1980: 118, f. 2-8 (Df).

Achaearanea baltoformis Yin & Peng, in Yin et al., 2012: 247, f. 78a-d (Dm).

Achaearanea biarclata Yin & Bao, in Yin et al., 2012: 249, f. 79a-d (Df).

Achaearanea budana Tikader, 1970: 16, f. 9a-b (Df).

Achaearanea coilioducta Yin, in Yin et al., 2012: 253, f. 82a-c (Df).

Achaearanea diglipuriensis Tikader, 1977a: 173, f. 9A-B (Df).

Achaearanea disparata Denis, 1965a: 396, f. 1-12 (Dmf).
Achaearanea disparata Darchen & Ledoux, 1978: 121, f. 4a-c (mf, may be S of Parasteatoda. tesselata).

Theridion diversipes Rainbow, 1920b: 242, pl. 29, f. 39-42 (Dmf).
Achaearanea diversipes Gray, 1974: 52 (T from Theridion).

Achaearanea dubitabilis Wunderlich, 1987a: 217, f. 571-573 (Df).

Achaearanea durgae Tikader, 1970: 17, f. 10a-b (Df).

Theridion epicosmus Rainbow, 1920b: 243, pl. 29, f. 43-44 (Df).
Achaearanea epicosmum Gray, 1974: 52 (T from Theridion).

Achaearanea extumida Xing, Gao & Zhu, 1994: 166, f. 6-8 (Dm).

Achaearanea flavomaculata Yin, in Yin et al., 2012: 257, f. 85a-c (Dm).

Achaearanea globispira Henschel & Jocqué, 1994: 1288, f. 1-6 (Dmf).
Achaearanea globispira Dippenaar-Schoeman et al., 2021z: 6, 5 f. (mf).

Achaea hieroglyphica Mello-Leitão, 1940d: 202 (Df).
Chrysso pentagona Caporiacco, 1954: 75, f. 12, 12a (Df) [urn:lsid:nmbe.ch:spidersp:060874].
Achaearanea pentagona Levi, 1962b: 211 (T from Chrysso).
Achaearanea pentagona Levi, 1963b: 202, f. 1-3 (f).
Achaearanea hieroglyphica Levi, 1967b: 22 (S of Achaearanea pentagona).
Achaearanea hieroglyphica Agnarsson & Coddington, 2007: 638, f. 7-10 (f; m see Cryptachaea ingijonathorum).
Achaearanea hieroglyphica Buckup, Marques & Rodrigues, 2012a: 210, f. 4-6 (Dm).
Achaearanea CF hieroglyphica Carvalho & Gasnier, 2019: CB49, f. 235-236 (f).

Achaearanea inopinata Brignoli, 1972c: 378, f. 31-32 (Dm).

Achaearanea linhan Yin & Bao, in Yin et al., 2012: 264, f. 89a-c (Df).

Achaearanea machaera Levi, 1959b: 75, f. 51 (Dm).

Theridion maricaoensis Bryant, 1942b: 2, f. 2-4 (Dm).
Achaearanea maricaoensis Levi, 1959b: 73, f. 45-50 (m, Df, T from Theridion).
Achaearanea maricaoensis Levi & Levi, 1962: 43, f. 80 (f).
Achaearanea maricaoensis Vanuytven, 2021: 51, f. B.1c, B.2c (m).

Dipoena micratula Banks, 1909a: 205, pl. 6, f. 29 (Dm).
Achaearanea micratula Levi, 1963a: 138 (T from Dipoena).
Achaearanea micratula Levi, 1963b: 232, f. 109 (m).

Theridion nigrodecoratum Rainbow, 1920b: 241, pl. 28, f. 35-37 (Df).
Achaearanea nigrodecoratum Gray, 1974: 52 (T from Theridion).

Theridion properum Keyserling, 1890: 242, pl. 22, f. 2 (Df).
Theridion properum Hickman, 1967: 48, f. 82-83 (f, Dm).
Achaearanea properum Gray, 1974: 52 (T from Theridion).

Achaea septemguttata Simon, 1909e: 91 (Df).

Achaearanea simaoica Zhu, 1998: 84, f. 46A-C (Df).
Achaearanea simaoica Song, Zhu & Chen, 1999: 91, f. 42C-D (f).

Achaearanea tingo Levi, 1963b: 202, f. 4-6 (Df).
Achaearanea tingo Buckup, Marques & Rodrigues, 2012a: 210, f. 3 (Dm).

Argyrodes trapezoidalis Taczanowski, 1873: 115, pl. 5, f. 10 (Dmf).
Achaea insignis O. Pickard-Cambridge, 1882c: 428, pl. 30, f. 5 (Dm) [urn:lsid:nmbe.ch:spidersp:060875].
Thwaitesia diversa O. Pickard-Cambridge, 1882c: 432, pl. 31, f. 8 (Df) [urn:lsid:nmbe.ch:spidersp:060876].
Achaea trapezoidalis Keyserling, 1884a: 102, pl. 5, f. 66 (mf, S of Achaea insignis and Thwaitesia diversa).
Achaea trapezoidalis Simon, 1894a: 551, f. 562 (f).
Achaea trapezoidalis Archer, 1950: 17, pl. II, f. 1 (m).
Achaearanea trapezoidalis Levi, 1955a: 9, f. 7-13 (mf).
Achaearanea trapezoidalis Levi & Levi, 1962: 43, f. 74-75 (m).
Achaearanea trapezoidalis Agnarsson, Coddington & Knoflach, 2007: 368, f. 118 (m).
Achaearanea trapezoidalis Vanuytven, 2021: 45, 51, f. A.34b, B.1a-b, B.2a (m).

Achaearanea globosa Patel, 2003: 1208, f. 1-6 (Dmf; preoccupied by Hentz, 1850, see Hentziectypus globosus) [urn:lsid:nmbe.ch:spidersp:054448].
Achaearanea triangularis Patel, in Siliwal, Molur & Biswas, 2005: 2004, 2040 (replacement name).