Description of Chitwoodiellus Gracilis Gen. N., Sp. N. From Spain, With a Study On Its Morphometric Differentiation From Chitwoodius Furstenberg &amp; Heyns, 1966 (Nematoda: Tylencholaimidae)

SummaryChitwoodius coffeae sp. n. is described, including SEM observations and molecular (D2-D3 expansion segment of the rDNA 28S) analysis, from a coffee plantation in the Central Highlands of Vietnam. The new species is characterised by its 1.69-2.01 mm long body in females and 1.29-1.51 mm in males, lip region offset by deep constriction and 15-17 μm broad, odontostyle 27-30 μm long, neck 340-473 μm long, pharyngeal expansion occupying 52-54% of total neck length, uterus a simple tube-like structure 68-106 μm long, vulva longitudinal (V = 54-59), tail short and rounded conoid (20-28 μm, c = 54-88, c′ = 0.6-0.8) with a nearly terminal projection of inner cuticle layer, spicules 60-64 μm long, and 7-10 spaced ventromedian supplements without hiatus. SEM pictures, available for the first time for a representative of the genus, show a hexagonal (nearly hexastellate) oral field divided into six sectors by the existence of six deep incisures. Molecular analyses, also presented for the first time for a representative of the genus, results in a narrow evolutionary relationship among Chitwoodius and Tylencholaimus, and supports the monophyly of the Tylencholaimidae. This is the first record of Chitwoodius in Asian Far East territories. Chitwoodius ahmadi sp. n. is proposed for a misattributed population of C. seshadrii.

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Morphological and molecular characterisation of Chitwoodius coffeae sp. n. (Dorylaimida: Tylencholaimidae) from Vietnam, with a revised taxonomy of the genus

Hoang

Chu

Nguyen

et al. 2019

Nematol.

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Descripción de nuevas especies animales de la Península Ibérica e islas Baleares (1978-1994): tendencias taxonómicas y listado sistemático

Esteban¹,

Sanchiz²

1997

GRAELLSIA

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RESUMENDurante el periodo 1978-1994 se han descrito cerca de 2.000 especies animales nuevas para la ciencia en territorio ibérico-balear. Se presenta como apéndice un listado completo de las especies (1978)(1979)(1980)(1981)(1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993), ordenadas taxonómicamente, así como de sus referencias bibliográficas. Como tendencias generales en este proceso de inventario de la biodiversidad se aprecia un incremento moderado y sostenido en el número de taxones descritos, junto a una cada vez mayor contribución de los autores españoles. Es cada vez mayor el número de especies publicadas en revistas que aparecen en el Science Citation Index, así como el uso del idioma inglés. La mayoría de los phyla, clases u órdenes muestran gran variación en la cantidad de especies descritas cada año, dado el pequeño núme-ro absoluto de publicaciones. Los insectos son claramente el colectivo más estudiado, pero se aprecia una disminución en su importancia relativa, asociada al incremento de estudios en grupos poco conocidos como los nematodos. Palabras clave: Biodiversidad; Taxonomía; Península Ibérica; España; Portugal; Baleares. ABSTRACT Description of new animal species from the Iberian Peninsula and BalearicIslands (1978-1994): Taxonomic trends and systematic list During the period 1978-1994 about 2.000 new animal species have been described in the Iberian Peninsula and the Balearic Islands. A complete list of these new species for 1978-1993, taxonomically arranged, and their bibliographic references is given in an appendix. Global trends in this process of biodiversity inventory demostrate a moderate but continuous increment in the number of taxa descriptions, as well as a higher contribution of Spanish authors. The number of articles published in journals listed by the Science Citation Index, and the use of the English language, are clearly growing. Most of the different phyla, classes or orders show an extreme variation in the number of described species per year, probably due to the small absolute number of publications. Insects clearly are the most studied group, but a certain decrease in its relative importance can be observed, related to the increase of studies on poorly known groups, such as nematodes.

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Description of Chitwoodiellus Gracilis Gen. N., Sp. N. From Spain, With a Study On Its Morphometric Differentiation From Chitwoodius Furstenberg & Heyns, 1966 (Nematoda: Tylencholaimidae)

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Morphological and molecular characterisation of Chitwoodius coffeae sp. n. (Dorylaimida: Tylencholaimidae) from Vietnam, with a revised taxonomy of the genus

Morphological and molecular characterisation of Chitwoodius coffeae sp. n. (Dorylaimida: Tylencholaimidae) from Vietnam, with a revised taxonomy of the genus

Descripción de nuevas especies animales de la Península Ibérica e islas Baleares (1978-1994): tendencias taxonómicas y listado sistemático

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