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Morphological and molecular characterisation of Punctodera mulveyi n. sp. (Nematoda: Punctoderidae) from a golf course green in Oregon, USA, with a key to species of Punctodera
In: NematologySummary
Punctodera mulveyi n. sp. is described and illustrated from turf grass (Poa annua) in golf course greens with other fescues in Bandon, Coos County, Oregon, USA. Females and cysts are characterised by a saccate, globose to ovoid or pear-shaped body with a protruding neck. The cuticle has a lace-like pattern of ridges and heavy punctations on the subsurface. Cysts have distinctive vulval and anal circumfenestral patterns with heavy bullae scattered around the fenestral area, these being absent in young cysts. Second-stage juveniles (J2) vermiform, tapering to a long and cylindrical tail with a bluntly rounded to occasionally clavate tail terminus. Morphologically the new species resembles all known species of Punctodera using both light microscopy and scanning electron microscopy observations, but differs from the other species either by the J2 body and stylet length, shape of head, tail and tail terminus, female and male stylet or spicule length, and in having distinctive vulval and anal circumfenestral patterns in the cysts. Molecular analysis with sequence alignments and phylogenetic trees of ITS rDNA, nuclear heat shock protein 90 and mitochondrial COI sequences separated P. mulveyi n. sp. from P. matadorensis, P. punctata, P. stonei and P. chalcoensis, but 18S and 28S were relatively conserved with a few bp differences and there were insufficient Punctodera species sequences to give strong support to a new species designation. A morphologically most closely related species, P. stonei from Canada, further supported the status of P. mulveyi n. sp. An identification key to all five nominal species of Punctodera is given.
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| All Time | Past Year | Past 30 Days | |
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| Abstract Views | 423 | 219 | 31 |
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Morphological and molecular characterisation of Punctodera mulveyi n. sp. (Nematoda: Punctoderidae) from a golf course green in Oregon, USA, with a key to species of Punctodera
In: NematologySummary
Punctodera mulveyi n. sp. is described and illustrated from turf grass (Poa annua) in golf course greens with other fescues in Bandon, Coos County, Oregon, USA. Females and cysts are characterised by a saccate, globose to ovoid or pear-shaped body with a protruding neck. The cuticle has a lace-like pattern of ridges and heavy punctations on the subsurface. Cysts have distinctive vulval and anal circumfenestral patterns with heavy bullae scattered around the fenestral area, these being absent in young cysts. Second-stage juveniles (J2) vermiform, tapering to a long and cylindrical tail with a bluntly rounded to occasionally clavate tail terminus. Morphologically the new species resembles all known species of Punctodera using both light microscopy and scanning electron microscopy observations, but differs from the other species either by the J2 body and stylet length, shape of head, tail and tail terminus, female and male stylet or spicule length, and in having distinctive vulval and anal circumfenestral patterns in the cysts. Molecular analysis with sequence alignments and phylogenetic trees of ITS rDNA, nuclear heat shock protein 90 and mitochondrial COI sequences separated P. mulveyi n. sp. from P. matadorensis, P. punctata, P. stonei and P. chalcoensis, but 18S and 28S were relatively conserved with a few bp differences and there were insufficient Punctodera species sequences to give strong support to a new species designation. A morphologically most closely related species, P. stonei from Canada, further supported the status of P. mulveyi n. sp. An identification key to all five nominal species of Punctodera is given.
| All Time | Past Year | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 423 | 219 | 31 |
| Full Text Views | 366 | 329 | 84 |
| PDF Views & Downloads | 88 | 35 | 7 |