New Zealand Journal of Zoology abstracts

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Criconematidae (Nematoda: Tylenchida) from the New Zealand region: analysis of and key to Criconema (Nothocriconemella) species

G. W. YEATES

Manaaki Whenua - Landcare Research
Private Bag 11052
Palmerston North, New Zealand

P. A. A. LOOF

Nematology Department
Agricultural University
6700 ES Wageningen
The Netherlands

W. M. WOUTS

Manaaki Whenua - Landcare Research
Private Bag 92170
Auckland, New Zealand

Abstract  Relationships of Criconema species characterised by the second annule not being narrower than the first, the postvulval region tapering regularly, and R>70 were investigated. This group of species has sometimes been assigned to the genus or subgenus Nothocriconemella. Cluster analysis of 46 populations representing the nominal species in the Criconema mutabile-group demonstrated that, except for C. undulatum, C. acuticaudatum, C. alpinum, and C. graminicola (all described as new by Loof, Wouts, and Yeates in 1997), C. californicum, and possibly C. kovacsi, they all belong to the species C. mutabile. Comparison of 15 collections and descriptions revealed problems in discriminating between C. sphagni and C. macilentum; a comprehensive analysis of additional populations is necessary to resolve their status. A key is given to the 14 recognised species of `Nothocriconemella'.

Keywords  nematodes; Criconema; Nothocriconemella; C. sphagni; C. macilentum; cluster analysis; key; New Zealand

Received 27 March 1996; accepted 29 October 1996

New Zealand Journal of Zoology, 1997, Vol. 24: 153-162

0301-4223/2402-0153 $7.00/0   (c) The Royal Society of New Zealand 1997

PDF file of entire paper: medium quality (742K); (scanned from paper original: notes about this process)

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