Valid Names Results

Clavaspis ulmi (Johnson, 1896) (Diaspididae: Clavaspis)

Nomenclatural History

• Aspidiotus ulmi Johnson 1896: 152. Type data: U.S.A.: Illinois, Champaign, University campus, on Ulmus americana.. 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 (Hemiberlesia) ulmi Johnson, 1896; Cockerell 1899a: 396. change of combination
• Aonidiella ulmi (Johnson, 1896); Leonardi 1900: 342. change of combination
• Hendaspidiotus ulmi (Johnson, 1896); MacGillivray 1921: 440. change of combination
• Clavaspis ulmi (Johnson, 1896); Ferris 1938a: 211. change of combination

Common Names

• corky bark aspidiotus MillerDa2005
• elm armored scale MillerDa2005
• elm Aspidiotus Johnso1896
• elm Clavaspis scale MillerDa2005

Ecological Associates

Hosts:

Families: 10 | Genera: 11

Foes:

Families: 2 | Genera: 2

Geographic Distribution

Keys

• MillerDa2005: pp.29-36 ( Adult (F) ) [Field Key to Economic Armored Scales]
• Gill1997: pp.101 ( Adult (F) ) [Species of California]
• McDani1968: pp.232 ( Adult (F) ) [U.S.A.: Texas]
• Ferris1942: pp.32 ( Adult (F) ) [North America]
• Kuwana1933b: pp.49 ( Adult (F) ) [Japan]
• Britto1923: pp.371 ( Adult (F) ) [U.S.A.: Connecticut]
• Hollin1923: pp.7-8 ( Adult (F) ) [U.S.A.: Missouri]
• Lawson1917: pp.217 ( Adult (F) ) [U.S.A.: Kansas]
• DietzMo1916a: pp.289-290 ( Adult (F) ) [U.S.A.: Indiana]
• Newell1899: pp.25 ( Adult (F) ) [North America]

Remarks

• Structure: Scale of the female white or gray, circular, quite convex, with the exuviae submarginal; that of the male not available (Ferris, 1938a). Colour photograph by Gill (1997).
• Biology: Occurring ordinarily on rough bark (Ferris, 1938a).
• Economic Importance: The elm armoured scale has been recorded from many states in USA (see Distribution), but not reported to cause damage (Gill, 1997).
• General Remarks: Description and illustration of adult female by Ferris (1938a), Kosztarab (1996) and by Gill (1997).

Illustrations

Citations