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Description of Cryptaphelenchus recticaudatus n. sp. (Aphelenchoidea: Ektaphelenchinae) in Pinus elliottii from the USA

In: Nematology
Authors:
Jianfeng GuTechnical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy), 8 Huikang, Ningbo 315100, Zhejiang, P.R. China

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https://orcid.org/0000-0002-8514-813X
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Yiwu FangTechnical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy), 8 Huikang, Ningbo 315100, Zhejiang, P.R. China

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Xinxin MaTechnical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy), 8 Huikang, Ningbo 315100, Zhejiang, P.R. China

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https://orcid.org/0000-0003-2859-7390
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Summary

Cryptaphelenchus recticaudatus n. sp. is described and illustrated in Pinus elliottii from the USA. The new species is characterised by the female body 310-431 μm long with distinctly annulated cuticle, lateral fields with four lines, lip region separated from the body by a shallow depression, delicate stylet with small knobs, post-vulval uterine sac short, and rectum and anus invisible. Males are 228-314 μm long, spicules 9.8-12.4 μm long with a well-developed and broad condylus, and seven caudal papillae arranged as a single (P1) and pair (P2) of precloacal papillae plus two pairs of postcloacal papillae. Based upon the general female morphology, the new species most closely resembles C. baujardi and C. iranicus. The morphological differences with the aforementioned species and other species of the genus are discussed. The phylogenetic analyses based on small (SSU) and large subunit (LSU) D2-D3 expansion segments of ribosomal DNA of different individuals of the new species revealed that the new species fell into the Cryptaphelenchus clade in both SSU and LSU trees. The monophyly of the genus was retained after adding newly generated sequences of the new species.

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