Two new species of Paurodontella Husain &amp; Khan, 1968 (Nematoda: Sphaerulariidae) associated with wheat and a diagnostic compendium to the genus

Heydari

2016

Journal of Nematology

Paurodontella parapitica n. sp., collected from the rhizosphere of an apple tree in Kermanshah province, western Iran, is described. The new species is characterized by a body length of 505 to 723 mm (females) and 480 to 600 mm (males), lip region continuous by depression; 7 to 8 mm broad, 3 to 4 mm high, stylet length 7 to 9 mm or 1 to 1.3 times the lip region diameter, short postuterine sac of 4 to 6 mm long, lateral fields with five to six incisures; outer incisures crenated and inner incisures weakly crenated, excretory pore situated 90 to 100 mm from anterior end; functional males common in the population, with spicules 24 to 26 mm long. Tail of both sexes similar, almost straight and elongate-conoid. The new species resembles in morphology and morphometrics to four known species of the genus, namely P. apitica, P. minuta, P. myceliophaga, and P. sohailai. The results of phylogenetic analyses based on sequences of D2/D3 expansion region of 28S rRNA gene revealed this genus is polyphyletic in four different clades in Tylenchid.

mentioning

confidence: 99%

mentioning

confidence: 99%

Paurodontella parapitica n. sp. (Nematoda: Hexatylina, Sphaerularioidea) from Kermanshah Province, Western Iran

Heydari

2016

Journal of Nematology

“…The Paurodontella species may be divided into two assemblages; one ‘ diverticulum -species’ group and other ‘ none-diverticulum species’ group. The new species belonging to a group of none-diverticulum species group in the genus are further characterized by lacking a structure in their reproductive system that is referred to as the diverticulum; a prominent, small, anterior projection attached to oviduct forming a uterine diverticulum of variable size which may function as spermatheca (Handoo et al , 2010). The classification of these groups is based on morphological features.…”

Section: Discussionmentioning

confidence: 99%

“…The genus Paurodontella was erected by Husain & Khan (1968) and currently contains 15 nominal species (Handoo et al , 2010; Esmaeili et al , 2016a, b, 2019; Golhasan et al , 2016; Yaghoubi et al , 2018) including Paurodontell aberrans (Nandakumar & Khera, 1969) Sumenkova, 1975; Paurodontell apitica (Thorne, 1941) Husain & Khan, 1968; Paurodontell asymmetricus (Tikyani & Khera, 1968) Sumenkova, 1975; Paurodontell densa (Thorne, 1941) Husain & Khan, 1968; Paurodontell minuta Husain & Khan, 1968; Paurodontell niger (Thorne, 1941) Husain & Khan, 1968; Paurodontell sohaili Maqbool, 1982; Paurodontell auriculata Anderson, 1985; Paurodontell balochistanica Handoo et al , 2010; Paurodontell myceliophaga Handoo et al , 2010; Paurodontell iranica Golhasan et al , 2016; Paurodontell persica Esmaeili, Heydari & Ye, 2016; Paurodontell parapitica Esmaeili, Heydari & Ye, 2016; Paurodontell gilanica Yaghoubi et al , 2018; and Paurodontell composticolla Esmaeili et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

A new species of the genus Paurodontella Husain & Khan, 1968 (Nematoda: Hexatylina, Sphaerularioidea) with its molecular phylogenetic study

Heydari

2022

J. Helminthol.

A new species of the genus Paurodontella, Paurodontella minora n. sp., collected from Alborz Province, Iran, is described and illustrated based on morphological and molecular characters. The new species is characterized by its body length of 393 (350–438) μm and 380 (n = 1) μm in female and male, respectively, 6–7 incisures in lateral field, lip region annulated and continuous with body contour, and total stylet 6.1 (5.5–7.0) μm long. Basal pharyngeal bulb with small posterior extension projecting reaching to the intestine. Excretory pore situated at the level of basal pharyngeal bulb region, no post-uterine sac, conical tail, narrowing to a rounded tip, and rare male with slender tylenchoid spicules and adanal bursa. The new species comes close in morphology and morphometrics to four known species of the genus, namely Paurodontella asymmetrica, Paurodontella balochistanica, Paurodontella densa and Paurodontella niger. In molecular phylogenetic analyses using D2–D3 expansion segments of the large subunit rDNA gene sequence, P. minora n. sp. formed a major clade with species of the genera in the family Sphaerulariidae (Paurodontella, Paurodontoides, Veleshkinema and Sphaerularia) and a sister relation with the members in the families Neotylenchidae and Anguinidae with the same clade support values in Bayesian inference.

“…Siddiqi (1986, 2000) considered Paurodontoides as a valid genus and proposed the family Paurodontidae Thorne, 1941 as a junior synonym of Sphaerulariidae Lubbock, 1861. Some nematologists accepted Siddiqi's opinion (Chizhov, 2004; Andrássy, 2007; Handoo et al ., 2010; Esmaeili et al ., 2016 a, b; Golhasan et al ., 2016). According to the classification by Siddiqi (2000), Paurodontoides is a member of the subfamily Paurodontinae Thorne, 1941 belonging to the family Paurodontidae, in superfamily Sphaerularioidea Lubbock, 1861.…”

Section: Introductionmentioning

confidence: 99%

Molecular and morphological characterization of Paurodontoides siddiqii n. sp. (Nematoda: Hexatylina, Sphaerulariidae) associated with bark samples of Pinus eldarica from western Iran

Golhasan

et al. 2018

J. Helminthol.

A new species of Paurodontoides, P. siddiqii n. sp., is described and illustrated based on its morphological, morphometric, and molecular characters. The new species is characterized by a female 550–729 μm long, lip region continuous with body contour, stylet length 7.0–8.0 μm long or c. 1.0–1.2 times the lip region diameter, lateral fields with four smooth incisures, excretory pore at 85–125 μm from anterior end located at the base of the pharyngeal bulb or posterior to it, basal pharyngeal bulb with a short posterior extension projecting into the intestine, monodelphic–prodelphic reproductive system with prominent 19–22 μm long post-uterine sac, and elongate conoid tail with a filiform terminus. The new species is compared with two known species of the genus. It differs from the type species of the genus, P. linfordi, by having slightly shorter stylet, lateral field with smooth incisures, different position of the excretory pore, and absence of male. Compared to P. latus, the new species has a shorter body, shorter stylet, different position of the excretory pore, female tail shape and absence of male. The new species was also compared with close species of the genus Paurodontus because of lateral field marked with four lines, asymmetrical stylet knobs and absence of male. Molecular phylogenetic studies of the new species using partial sequences of 18S rDNA revealed that it forms a clade with a species of the genus Ficotylus. In phylogenetic analyses using partial sequences of the 28S rDNA D2-D3 domain, the new species formed a monophyletic group with a species of the genus Veleshkinema and Sphaerularia spp. (Sphaerulariinae).