Young Eoun Choi

Systematic Study of Dorylaimida from Korea

Abstract Two known and two new species of the family Actinolaimidae (Nematoda: Dorylaimida) (Thorne, 1939) Meyl, 1960 are described and illustrated. Afractinolaimus zairensis (Baqri et al. , 1973) Jairajpuri & Khan, 1992 and Egtitus andhricus Khan and Jairajpuri, 1994 were reported for the first time from Korea. Paractinolaimoides hawangensis n. sp. is 2.9–3.6 mm long, b=3.9–4.5; c=8.8; spicules=73.8–77.4 μm) and differs from the only known species Paractinolaimoides unicus Khan et al. , 1994 in having longer body, odontostyle, odontophore, prerectum, spicules and greater number of ventromedian supplements (L=1.9–2.1 mm; odontostyle=21–24 μm; odontophore= 24–26 μm; prerectum=87–105 μm; spicule=54–57 μm and ventromedian supplements= 10–12 in P. unicus ). Westindicus cheongsongensis n. sp. is 2.3–2.6 mm long; b=4.2–4.6; c=8.1–9.7; odontostyle=25.2–27.0 μm; spicules=61–65 μm and differs from all known species of the genus in having greater number of ventromedian supplements (15–17 in Westindicus cheongsongensis n. sp. vs. 5–7 in Westindicus brachycephalus , 11 in Westindicus keralaensis and 8 in Westindicus rapax ). This new cheongsongensis further differs from Westindicus rapax Hunt, 1978 in having a shorter odontostyle and a lesser ‘V’ value (odontostyle=27–32 μm and V=49–52 in W. rapax ); from W. keralaensis Khan et al. , 1994 in having longer filiform tail and from W. brachycephalus Thorn, 1967 in possessing longer odontostyle (c=20 and odntostyle=15 μm in W. keralaensis and W. brachycephalus , respectively).

Systematic Study of Dorylaimida from Korea: 3. Three New and Four Known Species of Dorylaimida from Korea

Abstract Three new and four known species of dorylaim nematodes are described and illustrated. Lenonchium asterocaudatum n. sp. is 2.5–3.1 mm long; c=17.3–25.1; odontostyle=16–19 μm and resembles Lenonohium oryzae Siddiqi, 1965 and Lenonohium macrodorum Ahmad and Jairajpuri, 1988 but differs from the former in the presence of 4–5 projections (mucronate) or starshaped structures on the tail tip in both sexes and from the latter in having a shorter odontostyle (33–35 μm in L. macrodorum). Paravulvus kyeryongensis n. sp. is 0.9–1.1 mm long; c=49.5–67; odontostyle=5.8–7.3 μm and comes close to Paravulvus papillatus and Paravulvus teres but differs from P. papillatus in having a longer and slender body (L=1.31–1.49 mm; a=41–46 vs. L=0.94–1.22 mm; a=30–36); shorter odontostyle (6–7 μm vs. 8–9 μm) and lesser ‘Vrsquo; value (48–49 vs 51–53); from P. teres differs in having longer prerectum (38–54 μm vs. 28–36 μm). Proleptonchus parkerus n. sp. is 1.3–1.4 mm long; c=82.3; odontostyle=5.1–5.8 μm and comes close to Proleptonchus indicus, Proleptonchus saccatus, Proleptonchus lacihoveyensis, and Proleptonchus johnsoni because of the presence of post uterine sac with rudimentary oviduct and ovary, but differs from all of them in having a prerectal chamber before it joins rectum. The new species also differs from P. saccatus in having non-duplex amphids and a much smaller basal bulb (33.5–40.1 μm vs 51.2–54.4 μm); from P. johnsoni in having smaller posterior uterine sac (4 vs. 2 body width); from P. lacihoveyensis in having non-duplex amphids. P. indicus, the most close to new species but have a smaller posterior uterine sac (55.8–75.6 μm vs 94 μm). Aquatides intermedius, Axonchium asacculum, Axonchium vaginatum and Paravulvus papillatus were recorded for the first time from Korea.

Observations of some species of Criconemoides Taylor, 1936 (Nematoda: Criconematidae) with proposals of new synonyms.

Four species of Criconemoides Taylor, 1936 are discussed and the following new synonyms are proposed. C. pleriannulatus Ebsary, 1979, C. mutabilis Eroshenko, 1980 nec Taylor, 1936, C. striatellus Eroshenko, 1980, C. multiannulatus Eroshenko, 80, C. echinopanaxi Mukhina, 1981 and C. eroshenkoi Siddiqi, 1986 are considered as junior synonyms of C. annulatus Taylor, 1936; C. tulaganovi (Kirjanova, 1948) Raski, 1958, C. mongomorgum Darekar & Khan, 1979 and C. sabulosus Eroshenko, 1981 of C. informis (Micoletzky, 1922) Taylor, 1936; C. amorphus De Grisse, 1967 and C. tafoensis Luc, 1970 of C. mongolensis Andrassy, 1964. C. myungsugae (Choi & Geraert, 1975) Loof & De Grisse, 1989 is redescribed from paratypes.Quatre especes de Criconemoides Taylor, 1936 sont discutees et de nouvelles synonymies sontproposees. C. pleriannulatus Ebsary, 1979, C. mutabilis Eroshenko, 1980, nec Taylor, 1936, C. striatellus Eroshenko, 1980, C. multiannulatus Eroshenko, 1980, C. echinopanaxi Mukhina, 1981 et C. eroshenkoi Siddiqi, 1986 sont consideres comme synonymes mineurs de C. annulatus Taylor, 1936; C. tulaganovi (Kirjanova, 1948) Raski, 1958, C. mongomorgum Darekar & Khan, 1979 et C. sabulosus Eroshenko, 1981 de C. informis (Micoletzky, 1922) Taylor, 1936; C. amorphus De Grisse, 1967 et C. tafoensis Luc, 1970 de C. mongolensis Andrassy, 1964. C. myungsugae (Choi & Geraert, 1975) Loof & De Grisse, 1989 est redecrit a partir des paratypes.

Three New Species of Predatory Nematodes (Dorylaimida: Actinolaimoidea) from Korea

Abstract Three new species of predatory nematodes belonging to family Actinolaimidae, superfamily Actinolaimoidea, order Dorylaimida are described and illustrated. Westindicus sanaensis sp. n. has a body 1.9–2.4mm long; b = 3.7–4.3; c = 8.1–8.5; odontostyle 26.5–28.0μm long; spicules 71–74μm long; ventromedian supplements 15 and comes close to Westindicus cheongsongensis Choi et al , 1998 and Westindicus keralaensis Khan et al. , 1994. Egtitus koriensis sp. n. is 1.8–2.0 mm long; b = 3.4–4.1; c = 14–18; odontostyle 20–21 μm, and comes close to Egtitus elaboratus (Cobb, 1906) Thorne, 1967; Egtitus itanagrus Khan et al. , 1994 and Egtitus adhricus Khan & Jairajpuri, 1994. Stopractinca glandulus sp. n. is 2.3–2.4 mm long; b = 4.0–4.1; c = 11–12; odontostyle 26–28μm and differs from other two known species viz., Stopractincta orientalis Khan et al. , 1994 and Stopractincta malnadensis Dhanam et al. , 1994 in having very thick body cuticle and longer cardia, and in the presence of a gland at the base of oesophagus.

Description of lotonchus onchus n. sp. and Detailed Observations on I. litoralis Coetzee, 1967 (Anatonchoidea: Mononchida) from Korea

Abstract Iotonchus onchus n. sp. is characterised by 2.4–2.5 mm long body; buccal cavity with posteriorly placed dorsal tooth at 72–77% of its length, dorsally swollen oesophageal collar, tuberculate cardia, presence of pre- and post-vulval papillae, muscular vagina without sclerotization and males with 11 pre-cloacal ventromedian supplement and 2 post-cloacal ventral papillae. Another species, I. litoralis reported here for the first time from Korea is also described in detail with variations in its buccal cavity length, tooth position and ‘a’ value.