Pachypsylla celtidisasterisca

Pachypsylla celtidismamma

Pachypsylla celtidisgemma

Pachypsylla celtidisinteneris

Pachypsylla celtidisvesicula

Pachypsylla pallida

Pachypsylla venusta

Pachypsylla celtidisumbilicus

Pachypsylla celtidispubescens

Pachypsylla celtidisglobula

Pachypsylla celtidiscucurbita

Pachypsylla celtidisasterisca Riley, 1890

Pachypsylla celtidis-asteriscus Riley,  1884  [nomen  nudum].  Proc.  Amer. Assoc. Advan. Sci. 32:319.
Pachypsylla celtidis-asteriscus Riley, 1890. USDA Bull. 7:618.
Pachypsylla celtidisasterisca:  Riemann,  1966 [emendation]. Ann.  Entomol. Soc. Am. 59:1089.

Pachypsylla celtidismamma (Riley, 1875) 

Psylla celtidis-mamma Riley, 1875. Johnson’s New Universal Cyclopaedia vol2, p. 415; fig. 1a-c.
Pachypsylla celtidis-mamma: Riley, 1883. Can. Entomol. 15:157; fig. 7a-c.
Pachypsylla c.-mammae [sic]: Patch, 1912. Maine Agric. Exp. Stn. Bull. 202:224.
Pachypsylla  rowheri Cockerell,  1910.  Ent.  News  21:180. [synonymized  by Tuthill  1943:537]. 
Pachypsylla  celtidismamma:  Riemann,  1966  [emendation].  Ann.  Entomol.Soc. Am. 59:1089.

Pachypsylla celtidisgemma Riley, 1885 

Blastophysa c.-gemma Riley, 1884 [nomen nudum]. Proc. Amer. Assn. Advan. Sci. 32:319.
Pachypsylla (Blastophysa) c.-gemma Riley, 1885. Proc. Biol. Soc. Wash. 2:74.
Pachypsylla gemma[sic]: Wells, 1916. Ohio J. Sci. 16:249-298. 
Pachypsylla celtidis-gemma: Van Duzee, 1916. Checklist of Hemiptera, p. 87.
Pachypsylla celtidisgemma: Riemann, 1966 [emendation]. Ann. Entomol. Soc.Am. 59:1089.

Pachypsylla celtidisinteneris Mally, 1894

Pachypsylla c.-inteneris Mally, 1894. Proc. Iowa Acad. Sci. 1:138.   
Pachypsylla inteneris[sic]: Crawford, 1914. USDA Bull. 83:113. 
Pachypsylla ungulata Caldwell, 1938. Ohio Biol. Surv. Bull. 34:255. [synonymized by Tuthill 1943:541].    
Pachypsylla celtidis-inteneris: Tuthill, 1943. Iowa St. Coll. J. Sci. 17:540.
Pachypsylla  celtidisinteneris:  Riemann,  1966  [emendation].  Ann.  Entomol.Soc. Am. 59:1089.

Pachypsylla celtidisvesicula Riley, 1890

Pachypsylla c.-vesiculumRiley, 1884 [nomen nudum]. Proc. Amer. Assn. Adv.Sci. 32:319.
Pachypsylla celtidis-vesiculum: Riley, 1890. USDA Bull. 7:618.
Pachypsylla celtidis-vesicula: Tuthill, 1943 [emendation]. Iowa State Coll. J.Sci. 17:538.
Pachypsylla celtidisvesicula:  Riemann,  1966  [emendation].  Ann.  Entomol.Soc. Am. 59:1089.

Pachypsylla pallida Patch, 1912 

Pachypsylla  pallidaPatch,  1912.  Maine  Agric.  Exp.  Sta.  Bull.  202:225;  fig.403.

Pachypsylla venusta (Osten-Sacken) 1861

Psylla venusta Osten-Sacken, 1861. Entomol. Zeit. Stettin 22:422
Pachypsylla  celtidis-venusta: [sic]  Riley,  1883.  Can.  Entomol.  15:157-158;fig. 6.
Psylla celtidis-grandis Riley, 1883. Can. Entomol. 15:157; fig. 6. 
Pachypsylla venusta: Riley, 1885. Proc. Biol. Soc. Wash. 2:72.
Pachypsylla tridentata Patch, 1912. Maine Agric. Exp. Sta. Bull. 202:224; fig.415 [synonymized by Crawford, 1914:110].

Pachypsylla celtidisumbilicus Riley, 1890

Pachypsylla celtidis-umbilicus Riley, 1890. USDA Bull. 7:619.
Pachypsylla celtidisumbilicus: Yang et al., 2001. Zoologica Scripta 30:111.

Pachypsylla celtidispubescens Riley, 1890

Pachypsylla celtidis-pubescens Riley, 1890. USDA Bull. 7:620.
Pachypsylla  celtidispubescens:  Riemann,  1966  [emendation].  Ann.  Entomol.Soc. Am. 59:1089.

Pachypsylla celtidisglobula Riley, 1890

Pachypsylla celtidis-globulus Riley, 1890. USDA Bull. 7:621.
Pachypsylla celtidisglobula: Yang et al., 2001 [emendation]. Zoologica Scripta 30:98.

Pachypsylla celtidiscucurbita Riley, 1890

Pachypsylla c.-cucurbita Riley, 1883 [nomen nudum]. Can. Entomol. 15:158.
Pachypsylla celtidis-cucurbita Riley,  1884  [nomen  nudum].  Proc.  Amer.  Assoc. Advan. Sci. 32:319. 
Pachypsylla celtidis-cucurbita Riley, 1890. USDA Bull. 7:621.
Pachypsylla cucurbita [sic]:  Smith  &  Taylor,  1953.  J.  Kansas  Entomol.  Soc.26:103.
Pachypsylla celtidiscucurbita Riemann, 1966 [emendation]. Ann.  Entomol.Soc. Am. 59:1089.

The Authority and Types for the Hackberry Gall Psyllid Genus Pachypsylla (Riley) (Hemiptera: Psyllidae)