Valid Names Results

Situlaspis yuccae (Cockerell, 1896) (Diaspididae: Situlaspis)

Nomenclatural History

• Aspidiotus yuccae Cockerell 1896h: 20. Type data: MEXICO: Coahuila, Ciudad Porfirio Diaz, on Yucca sp.. Syntypes, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; accepted valid name
• Aspidiotus (Chrysomphalus) yuccae Cockerell, 1896; Cockerell 1897i: 25. change of combination
• Hemiberlesia Yuccae (Cockerell, 1896); Leonardi 1897b: 119. change of combination
• Aspidiotus yuccae neomexicanus Cockerell & Parrott 1899: 278. Type data: UNITED STATES: New Mexico, Mesilla Valley, on Yucca elata, 1898, by C.H.T. Townsend. Syntypes, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; junior synonym (discovered by Ferris1920, 64). Illustr.
• Diaspis celtidis Cockerell 1899i: 106. Type data: UNITED STATES: Texas, San Antonio, on Celtis sp., 23/06/1898, by C.H.T. Townsend. Syntypes, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; junior synonym (discovered by Ferris1920, 65).
• Xerophilaspis Parkinsoniae Cockerell 1900d: 131. Type data: UNITED STATES: Arizona, Phoenix, on Parkinsonia torreyana, 23/10/1899. Syntypes, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; junior synonym (discovered by Ferris1920, 64).
• Targionia parkinsoniae (Cockerell, 1900); Fernald 1903b: 298. change of combination
• Targionia yuccae (Cockerell, 1896); Fernald 1903b: 298. change of combination
• Targionia yuccae neomexicana (Cockerell & Parrott, 1899); Fernald 1903b: 298. change of combination
• Pseudodiaspis parkinsoniae (Cockerell, 1900); Ferris 1919a: 56-57. change of combination
• Pseudodiaspis yuccae (Cockerell, 1896); Ferris 1920: 64. change of combination
• Neosignoretia yuccae (Cockerell, 1896); MacGillivray 1921: 424. change of combination
• Aspidiotus celtis (Cockerell, 1899); Lindinger 1932d: 197. emendation that is unjustified
• Situlaspis yuccae (Cockerell, 1896); Ferris 1937: SI-125. change of combination
• Aspidiotus neomexicanus Cockerell & Parrott, 1899; Ferris 1941: 46. change in status (level)

Common Names

• celtis scale Gill1997
• small situlaspis scale McKenz1956
• yucca scale Gill1997

Ecological Associates

Hosts:

Families: 16 | Genera: 31

Geographic Distribution

Keys

• MillerDa2005: pp.29-30 ( Adult (F) ) [Field Key to Economic Armored Scales]
• Gill1997: pp.261 ( ) [Key to California species of Situlaspis]
• McDani1973: pp.397 ( Adult (F) ) [Key to Texas species of Situlaspis]
• McKenz1956: pp.35 ( Adult (F) ) [Key to species of Situlaspis]
• Ferris1942: pp.SIV-446: 63 ( Adult (F) ) [Key to species of Situlaspis]

Remarks

• Structure: Female scale about 1.0 mm long, oval, flat, white, with the large, dark exuviae central. Male scale white, elongate oval, with exuviae near one end. Adult female small, scarcely exceeding 0.6 mm in length, slightly elongate oval, with thoracic region and 1st abdominal segment quite strongly sclerotized; pygidium acute; median lobes strongly developed, non-zygotic (Ferris, 1937).
• Biology: Brown (1960) reported this species to have a typical diaspidoid chromosome system with a 2n chromosome number of 10. (Miller & Davidson, 2005).
• Economic Importance: Miller & Davidson (1990) list this insect as a pest. It is a pest of ornamental plants in Arizona (Gill, 1997). The yucca scale is considered to be of occasional economic importance by Miller and Davidson (1990). Gill (1997) indicated that it is a troublesome pest of ornamentals in Arizona and is abundant on a number or yard plants especially ivy and yucca. He indicated that the pest is transported on nursery stock into the San Joaquin and Sacramento valleys. (Miller & Davidson, 2005).
• General Remarks: Detailed description and illustration by Ferris (1937).

Illustrations

Citations