Universität zu Köln

Abolafia, Joaquin, Bonkowski, Michael ORCID: 0000-0003-2656-1183, Pena-Santiago, Reyes and Alvarez-Ortega, Sergio ORCID: 0000-0003-2077-5041 (2016). Two atypical new species of the genus Sectonema Thorne, 1930 (Nematoda, Dorylaimida, Aporcelaimidae) from Vietnam. Eur. J. Taxon., 171. S. 1 - 21. PARIS: MUSEUM NATL HISTOIRE NATURELLE. ISSN 2118-9773

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Abstract

Two new species of the genus Sectonema from natural habitats of northern Vietnam are studied. This paper includes their descriptions, measurements, line illustrations, and light microscope (LM) and scanning electron microscope (SEM) pictures. Sectonema tropicum sp. nov. is characterized by a 2.56-3.24 mm long body, 19-21 mu m broad lip region, odontostyle 20-21 mu m long at its ventral side, 730-834 mu m long neck, pharyngeal expansion occupying 52-59% of total neck length, uterus a simple tube-like structure 150-242 mu m long or 1.2-2.5 times the body diameter, pars refringens vaginae present, V = 48-52, short (31-40 mu m, c = 70-91, c = 0.5-0.6) and rounded tail, 91-97 mu m long spicules, and only one weakly developed ventromedian supplement. Sectonema vietnamense sp. nov. is characterized by its slender (a = 33-49) and 2.71-4.25 mm long body, 14-16 mu m broad lip region, odontostyle 8-9 mu m long at its ventral side, 716-918 mu m long neck, pharyngeal expansion occupying 63-67% of total neck length, uterus simple and 209-242 mu m long or 2.5-2.9 times the corresponding body diameter, pars refringens vaginae absent, V = 54, short (34-39 mu m, c = 70-115, c = 0.6-0.8) and rounded tail, 59-75 mu m long spicules, and three or four irregularly spaced ventromedian supplements bearing hiatus. Both species are also characterized by their nearly continuous lip region, an atypical feature in this genus. Molecular analysis of S. tropicum sp. nov. confirms that Sectonema is a natural (monophyletic) taxon, very close to Metaporcelaimus.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Abolafia, Joaquin UNSPECIFIED UNSPECIFIED UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED Pena-Santiago, Reyes UNSPECIFIED UNSPECIFIED UNSPECIFIED Alvarez-Ortega, Sergio UNSPECIFIED orcid.org/0000-0003-2077-5041 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-287609
DOI:	10.5852/ejt.2016.171
Journal or Publication Title:	Eur. J. Taxon.
Volume:	171
Page Range:	S. 1 - 21
Date:	2016
Publisher:	MUSEUM NATL HISTOIRE NATURELLE
Place of Publication:	PARIS
ISSN:	2118-9773
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INFERENCE; MRBAYES; HEYNS Multiple languages Plant Sciences; Entomology; Zoology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28760