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1

Two new species of Anatonchus Cobb, 1916 (Nematoda: Mononchida)

100%
Winiszewska-Slipinska G.
Annales Zoologici
|
1988-1989
|
tom 42
|
nr 05-08
Two new species of Anatonchus (Cobb, 1916) De Conick, 1939 are described. Anatonchus istvani sp. n. collected in Poland differs from A. hortensis Andrássy, 1973 by the longer and wider body, larger buccal cavity, position of teeth apices, longer spicules, and from A. amiciae Coomans et Lima, 1965 by the well developed posterior gonad and larger buccal cavity. Anatonchus australicus sp. n. collected in Australia differs from A. ginglymodontus Mulvey, 1961 by the smaller buccal cavity, the tail shape, and from A. killiclci Clark, 1963 by the lack of papillae and pores in the vulval region, the tail shape and lack of the spineret.
2

Descriptions of two new species of Iotonchus and first record of Coomansus zschokkei [Mononchida] from Korea

100%
Choi Y. E., Khan Z.
Annales Zoologici
|
2000
|
tom 50
|
nr 2
Two new species of the genus Iotonchus and Coomansus zschokkei (Menzel, 1913) are described and illustrated. Iotonchus uisongensis sp. nov. is 1.5-1.6mm long, a=23.0-26.0, b=2.8-3.2, c=17.1-19.4 (female) and 19.6-23.0 (male), V=67.0-73.0, buccal cavity=52.0-63.0 x 31.0-36.5 µm, spicule 75.0-92.0 µm long, ventromedian supplements papillae 20-22 in numbers, and is characterized by having not protruded labial papillae, supra basal dorsal tooth, and flattened basal oblique plates of buccal cavity. Iotonchus damsanensis sp. nov. is 1.6-1.7mm long, a= 19.7-22.0, b=2.9-3.0, c=17.2-21.7, V=71.0-74.5, buccal cavity=58.0-61.0 x 35.0-37.0 µm, and is characterized by having offset lip region, well protruded labial papillae, basally tapered buccal cavity, and in having pre-vulval papillae. Coomansus zschokkei reported here for the first time from Korea is also described in detail with variation in the shape of male tail.
3

Morphometric plasticity in Prionchulus punctatus [Cobb, 1917] Andrassy, 1958 and Clarkus papillatus [Bastian, 1865] Jairajpuri, 1970 [Nematoda: Mononchida]: adaptation to different humus forms?

100%
Arpin P.
Annales Zoologici
|
2000
|
tom 50
|
nr 2
Morphometric variability was studied in Prionchulus punctatus and Clarkus papillatus from closely related forest sites: Site 1 (eutrophic to calcic mull humus), site 2 (contiguous to site 1, eutrophic mull humus with a more or less leached soil), site 3 (acid mull humus), site 4 (located in site 3 but just under the crown of an old oak, moder humus), site 7 (moder humus, developed in a wide area). Results from correspondence analysis for both nematode species from site 2 suggested two distinct population types (a) with small individuals (Pp: 1.85 ± 0.05 mm and 87.2 ± 5.7 µm for body length and tail length respectively; Cp: 1.11 ± 0.02 mm and 78.5 ± 1.9 µm) with typical characteristics of populations collected from a calcic mull and (b) larger individuals (Pp: 2.14 ± 0.04 mm and 100.2 ± 1.8 µm for body length and tail length respectively; Cp: 1.21 ± 0.01 mm and 83.3 ± 2.2 µm) similar to populations collected from an eutrophic mull. Results from correspondence analysis from site 4 showed that the populations of the two species had intermediate characteristics between populations collected from a mull humus and from a moder humus. Moreover, a laboratory culturing experiment with adult Clarkus papillatus collected from site 3 and cultured on three humus forms (calcic mull, site 1; acid mull, site 3; moder, site 7) showed that this species reproduced successfully on mull acid only. The conjunctural or the structural influence on morphometric plasticity of these species is discussed from a functional ecology aspect.
4

New and known species of Mononchida [Nematoda] from Mbalmayo Reserve Forest, Cameroon

84%
Ahmad W.
Annales Zoologici
|
2000
|
tom 50
|
nr 2
A new and four known species of mononchs are described from Cameroon. Mylonchulus vulvalatus sp. nov. has 1.24-1.48 mm long body; a = 30-33; b = 3.5-4.0; c = 25.5-27.8; V = 59-60; buccal cavity 27-29 x 16-17 µm and is characterized by its blister-like vulval region. It is closely related to M. brachyuris (Bütschli, 1873) Altherr, 1953, M. parabrachyuris (Thorne, 1924) Andrássy, 1958 and M. minor (Cobb, 1893) Andrássy, 1958. Margaronchulus mulveyi Andrássy, 1972; Mylonchulus orbitus Jensen et Mulvey, 1968; Crassibucca penicula Mulvey et Jensen, 1967 and Miconchus pararapax Mulvey et Jensen, 1967 are reported. Single specimen of a Jensenonchus sp. is also described which could not be accomodated in any of the known species of the genus.
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