Numbers
10 species in BugGuide's range (North America north of Mexico)
(1).
Identification
(Not all species and genders are shown here.)
Marpissa bina (male, female, female variety):
(image not from BugGuide; click to see source)
Marpissa formosa (male, female):
Marpissa grata (male):
Marpissa lineata (male, female):
Marpissa pikei (male, female):
Marpissa robusta (male):
Range
(Species that can be found in Canada are in bold.)
M. bina: southeastern states from Florida north to at least Beaufort, North Carolina.
(2)
M. bryantae: known only from the type locality in Texas.
(3)
M. dentoides: northeastern USA, inland to about Tennessee.
(2)
M. formosa: eastern USA &
southeastern Canada.
(2)(4)
M. grata: known from Florida, Michigan, Minnesota, &
Ontario.
(2)(4)
M. lineata: eastern USA &
southeastern Canada, but may be displaced by
M. sulcosa in Florida and along the southern coast.
(2)(4)
M. obtusa: known only from the type localities in Texas.[cite487565]
M. pikei: eastern USA &
southeastern Canada.
(2)(4)
M. robusta: known only from Arizona & California.
(2)
M. sulcosa: apparently restricted to Florida and the coastal region of the southern Atlantic states (GA, SC, NC).
(2) Remarks
M. bina &
M. formosa are very similar-looking; they were once thought to be the same species, but Barnes 1958
(2) separated them based on differences in genitalia.
M. bryantae &
M. pikei look the same in body coloration and have only slight differences in their genitalia, so might just be variations of a single species, according to Logunov
(3). It will not be known for sure until more
M. bryantae are collected.
M. lineata &
M. dentoides are similar in coloration
(2).
Internet References
Verified images found online:
Contributed by
tom murray on 18 November, 2005 - 7:26am
Additional contributions by
Mandy HoweLast updated 23 July, 2012 - 5:50pm