Sarisodera Wouts & Sher, 1971,

Ghaderi, Reza, 2019, An outline on distribution and hosts of the cystoid nematodes of Ataloderinae Wouts, 1973 and Meloidoderinae Golden, 1971, Zootaxa 4664 (3), pp. 339-350: 343-344

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Sarisodera Wouts & Sher, 1971


Sarisodera Wouts & Sher, 1971 

There is only one described species in the genus, S. hydrophila Wouts & Sher, 1971  , although some undetermined populations are reported in the literature. Wouts & Sher (1971) collected specimens of the genus Sarisodera  from soil or roots from several habitats and localities in California including willow ( Salix lasiolepis Benth.  , Salicaceae  ) from Riverside County; fern ( Polypodiaceae  ) and laurel ( Lauraceae  ) from the University of California, Berkeley campus; fern from Humboldt County; ironwood ( Lyonothamnus floribundus Gray  , Rosaceae  ) from Santa Cruz Island; pine ( Pinus  sp., Pinaceae  ) from Monterey; and oak ( Quercus  sp., Fagaceae  ) from Santa Barbara. They claimed that these collections appear to represent at least five species but sufficient specimens of only the willow population, which they described as S. hydrophila  , were available at the time. These authors also mentioned that specimens reported as Heterodera  sp. by Nickle (1960) from white pine ( Pinus monticola Dougl.  , Pinaceae  ) in Idaho could be considered as a species of the genus Sarisodera  . Mundo-Ocampo & Baldwin (1983a) considered Populus  ( Salicaceae  ) and Lyonothamnus  ( Rosaceae  ) as hosts of this nematode at the type locality and Santa Cruz Island, respectively. Choi & Kim (2001) found S. hydrophila  around the roots of a deciduous tree ( Fraxinus rhynchophylla  , Oleaceae  ) in Korea. Sturhan (2018) found two populations from rhizosphere soil of an unidentified tree of the family Fagaceae  and wild banana in northern Vietnam that are closely related to S. hydrophila  .

Luc et al. (1973) described S. africana  from guinea grass ( Panicum maximum  , Poaceae  ) from Senegal, but Baldwin & Bell (1985) emended the diagnosis of Sarisodera  to exclude cysts, which do not form in the type species, S. hydrophila  . They then transferred S. africana  to their new genus Afenestrata  . Later, Mundo-Ocampo et al. (2008) synonymized Afenestrata  with Heterodera  .

The histopathology of two populations of S. hydrophila  was examined on willow ( Salix lasiolepis Eenth.  , Salicaceae  ), cottonwood ( Populus fremontii Wats.  , Salicaceae  ), and ironwood ( Lyonothamnus floribundus Gray  , Rosaceae  ) using light microscopy as well as scanning and transmission electron microscopy. S. hydrophila  induces formation of a single uninucleate hypertrophied cell (giant cell) which varies only slightly among the three hosts. Cell wall ingrowths, such as those associated with host responses to certain other plant-parasitic nematodes, were not observed in giant cells induced by S. hydrophila  ( Mundo-Ocampo & Baldwin 1983a).