Description of two new and six known species of the genus Tylencholaimus de Man, 1876 (Nematoda: Dorylaimida) with a diagnostic compendium and key to species
Author
Ahad, Sumaya
Author
Ahmad, Wasim
text
Zootaxa
2016
4107
4
451
490
journal article
39143
10.11646/zootaxa.4107.4.1
ab6db32e-2995-4620-b521-d5cbaddbceae
1175-5326
267748
262D02B9-E5CF-429C-B0DF-D1BB42BDB604
Tylencholaimus
de
Man, 1876
=
Xenonchium
Siddiqi & Khan, 1964
Diagnosis (
Dorylaimida
:
Tylencholaimidae
):
Small sized nematodes, between 0.3 and
1.2 mm
in length. Cuticle tylencholaimoid, with irregular radial refractive elements; outer layer generally with fine transverse striations. Lip region always cap-like, offset by constriction or sometimes by depression; lips more or less amalgamated, with the perioral area either transformed into a disc-like structure or not. Cheilostom a truncate cone, often with perioral thickenings. Amphid aperture slit-like, about half as wide as corresponding lip region diameter. Odontostyle somewhat shorter than lip region diameter, its aperture about one-fourth to one-third of total length. odontophore rod-like, with more or less distinct basal knobs. Pharynx consisting of anterior slender part extending gradually or abruptly into the basal expansion with thickened inner lining, which occupies one-third to two-fifths of the total neck length. Cardia usually hemispheroid to rounded-conoid. Female genital system amphidelphic, monoprodelphic or mono-opisthodelphic. Vulva transverse. Males with dorylaimoid spicules, lateral guiding pieces and a few spaced (very rarely numerous and contiguous) ventromedian supplements. Tail similar in sexes, elongateconoid to hemispherical.
Type
species:
Tylencholaimus mirabilis
(
Bütschli, 1873
) de
Man, 1876
=
Tylenchus mirabilis
Bütschli, 1873
=
Dorylaimellus mirabilis
(
Bütschli, 1873
)
Thorne, 1939
=
Dorylaimellus
(
Tylencholaimus
)
mirabilis
(
Bütschli, 1873
)
Meyl, 1953
=
Discomyctus brevicaudatus
Tarjan, 1953
=
Tylencholaimus brevicaudatus
(
Tarjan, 1953
)
Tarjan, 1956
Other species:
T. airolensis
Loof & Jairajpuri, 1968
T. americanus
Peña-Santiago & Coomans, 1996
T. arakii
sp. n.
T. asymmetricus
Khan & Ahmad, 1994
T. australis
Yeates, 1979
T. cedari
(
Siddiqi & Khan, 1964
)
Jairajpuri & Ahmad, 1992
=
Xenonchium cedari
Siddiqi & Khan, 1964
T. chathami
Yeates, 1979
T. confusus
Ahmad & Araki, 2003
T. congestus
Loof & Jairajpuri, 1968
T. conicuadatus
Peña-Santiago & Coomans, 1994
T. constrictus
Vinciguerra, 1986
T. cosmos
(
Dhanam & Jairajpuri, 1999
)
Peña-Santiago, 2008
=
Amphitylencholaimus cosmos
Dhanam & Jairajpuri, 1999
T. crassus
Loof & Jairajpuri, 1968
T. cynodonti
Nasira, Erum & Shahina, 2005
T. decens
Andrássy, 1991
T. formosus
Loof & Jairajpuri, 1968
T. gallaicus
Seijas, Hernandez, Abolafia & Peña-Santiago, 2007
T. gertii
Kruger, 1965
T. ibericus
Peña-Santiago & Coomans, 1994
=
T. japonicus
Ahmad & Araki, 2003
T. imperanus
Mohilal & Dhanachand, 2003
=
Tylencholaimus
(
Discotylencholaimus
)
imperanus
Mohilal & Dhanachand, 2003
=
Tylencholaimus
(
Discotylencholaimus
)
lokus
Mohilal & Dhanachand, 2003
T. innebus
Ahmad & Jairajpuri, 1979
T. koreanus
Ahmad, Park, Lee & Choi, 2009
T. ladakhiensis
sp. n.
T. leptodorus
Monteiro, 1970
T. leptonchoides
Loof, 1964
=
T. macrurus
Siddiqi, 1964
=
T. similis
Jairajpuri, 1965
T. longicaudatus
Peña-Santiago & Coomans, 1994
T. loofi
Dhanachand, 1994
=
T. minutus apud
Dhanachand, Mohilal & Joymati, 1992
T. maritus
Loof & Jairajpuri, 1968
=
Tylencholaimus
sp.
Loof, 1964
T. micronanus
Yeates, 1979
=
T. vanguimus
Mohilal & Dhanachand, 2000
T. minimus
de
Man, 1876
T. minutus
Vinciguerra, 1986
T. mongolicus
Andrássy, 1967
T. nagauriensis
Baqri & Bohra, 2001
T. nanus
Thorne, 1939
T. notrus
Khan, Jairajpuri & Ahmad, 1990
T. obscurus
Jairajpuri, 1965
=
T. dorae
Kruger, 1965
T. orientalis
Li, Baniyamuddin, Ahmad & Wu, 2008
T. paracrassus
Monteiro, 1970
T. parvus
Ahmad & Araki, 2003
T. pini
Mushtaq, Naz & Ahmad, 2007
T. porosus
Vinciguerra & Zullini, 1980
T. proximus
Thorne, 1939
T. pusillus
Loof & Jairajpuri, 1968
T. rumjhumi
Khan & Laha, 1982
T. savaryi
Loof & Jairajpuri, 1968
T. sinensis
Li, Baniyamuddin, Ahmad & Wu, 2008
T. singaporensis
Ahmad & Baniyamuddin, 2010
T. stecki
Steiner, 1914
=
T. alpinus
Vinciguerra, 1982
T. suryawanshii
Ali & Chisty, 1972
T. tahatikus
(Yeates, 1967)
Siddiqi, 1968
=
Dorylaimellus tahatikus
Yeates, 1967
T. teres
Thorne, 1939
T. terrestris
Peña-Santiago & Coomans, 1996
T. vigil
Andrássy, 1959
T. vulvulatus
Rahman, Jairajpuri, Ahmad & Ahmad, 1987
=
Protylencholaimus longisaccus
Dhanam & Jairajpuri, 1999
Ahad & Ahmad (2016)
recently transferred
T. pakistanicum
to the genus
Tantunema
Siddiqi, 1982
, and hence it is not included in this list.