Hemicycliophora ahvasiensis n. sp. (Nematoda: Hemicycliophoridae), and data on a known species, from Iran

Abstract

Hemicycliophora ahvasiensis n. sp., recovered from the rhizospheric soil of date palm in Khuzestan province, southwest Iran, is described and illustrated based upon morphological, morphometric and molecular data. The new species is characterized by its sheath, closely fitting most of the body, cuticle with or without numerous irregular lines, sometimes appearing as blocks in distal body region. Lateral field without discrete longitudinal lines, but often with continuous broken striae or anastomoses. Continuous lip region with single annulus, slightly elevated labial disc, stylet with posteriorly sloping knobs. Vulva with or without slightly modified lips, spermatheca with sperm and tail conoid, symmetrically narrowing at distal region to form a narrow conical region. Morphologically, the new species looks similar to H. indica , H. labiata , H. siddiqii , H. tenuistriata and H. typica . The latter species appears more similar to the new species under light microscopy, but could be separated using the scanning electron microscopy and molecular data. The new species was also compared with H. epicharoides and H. dulli , two species with close phylogenetic affinities to it. The phylogenetic relationships of the new species were reconstructed and discussed using partial sequences of the D2-D3 expansion segments of large subunit, and internal transcribed spacer regions (LSU D2-D3 and ITS rDNA). Hemicycliophora conida , the second studied species, was recovered from north Iran and characterized by morphological and molecular data.

First report of Hemicycliophora conida from Russia

“…Hemicycliophora conida (Thorne, 1955) was originally described from soil samples collected from a sugar-beet fi eld near the village of Ballyculane in Ireland. This species was also reported in the Netherlands (Thorne, 1955, Loof, 1968, Belgium, England, Germany, Switzerland, Italy (Loof, 1968), Poland (Loof, 1968, Brzeski, 1998, Iran (Loof, 1984, Azimi et al, 2020, Spain (Castillo et al, 1989), the United States (Zeng et al, 2012), and Iceland (Flis et al, 2020. Recently, H. conida was found near the roots of wild red raspberries (Rubus idaeus L.) in Serebryany Bor Forest Park in Moscow, Russia.…”

Description of Hemicycliophora geraerti n. sp. (Tylenchida: Hemicycliophoridae) associated with Prunus persica L. from China

“…The forward D2A (5′-ACAAGTACCGTGAGGGAAAGTTG-3′) and the reverse D3B (5′-TCGGAAGGAACCAGCTACTA-3′) primers were used for amplification of D2-D3 28S (De Ley et al, 1999). The forward JB3 (5′- et al, 2018;Miraeiz et al, 2020;Nguyen et al, 2021;Azimi et al, 2021). Multiple alignments of the different sequences were made using the Q-INS-i algorithm of MAFFT v.7.205 (Katoh & Standley, 2013).…”

First report of an important sheat nematode, Hemicycliophora poranga, associated with sugar beet (Beta vulgaris L.) in Vietnam

“…Among Hemicycliophora spp., H. poranga (Monteiro & Lordello, 1978) was known as an important pest to agricultural crops and can cause signifi cant damages to many crops such as celery in Argentina (Emilse et al, 2011); Musa sp., cabbage, cowpea, bean, okra, lettuce, and tomato in the USA (Chitambar, 1993); and other 21 crops from different localities listed by Chitambar and Subbotin (2014). Currently, 135 valid species of the genus Hemicycliophora have been described over the world (Azimi et al, 2020;Chitambar & Subbotin, 2014;Nguyen et al, 2021). In Vietnam, Hemicyclio-phora spp.…”