Mudwigglus Leduc 2013
Creators: name: Holovachov, Oleksandr
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Araeolaimida
Diplopeltidae
Mudwigglus

description: Genus Mudwigglus Leduc, 2013
Type species
Mudwigglus patumuka Leduc, 2013
Diagnosis (emended after Leduc 2013)
Cuticle transversely striated; striae without ornamentation. Lateral alae absent. Body pores and epidermal glands present. Somatic sensilla present. Labial region bluntly rounded; lips fused. Inner labial sensilla invisible if present. Outer labial sensilla papilliform, located on the anterior surface of lips. Cephalic sensilla setiform; their bases located at the base of the labial region, anterior to amphid. Subcephalic and cervical sensilla, deirid and ocelli absent. Amphidial aperture loop-shaped (inverted U-shaped). Secretory-excretory system present; renette cell located opposite to the posterior part of the pharynx and anterior part of intestine. Cuticularised secretory-excretory duct very short, opens to the exterior at the level of the posterior part of pharynx. Oral opening apical. Buccal cavity small but distinctly subdivided into three sections: cheilostom narrow tubular; gymnostom barrel-shaped or truncate conoid, with weakly cuticularised walls; stegostom short conoid, its lining is uniform with the lining of the pharynx. Pharyngeal tubes absent. Pharynx subdivided into anterior corpus and posterior bulbus; corpus cylindrical, muscular, with evenly distributed myofilaments; bulbus muscular; pharyngeal lumen uniform in thickness along the entire pharynx length; valves absent. Dorsal gland orifice penetrates pharyngeal lumen at the base of the stoma, ventrosublateral gland orifices indistinct. Dorsal gland nucleus is visible in the basal bulbus. Female reproductive system didelphicamphidelphic with equally developed branches, ovaries antidromously reflexed. Spermatheca absent. Vulva equatorial. Vagina straight or oblique; pars proximalis vaginae encircled by single sphincter muscle; pars refringens vaginae and epiptygmata absent. Male reproductive system diorchic; anterior testis outstretched, posterior testis outstretched, with posteriorly reflexed terminal section of the germinal zone. Spicules symmetrical, arcuate; gubernaculum present. Supplements and precloacal sensilla present. Setae in caudal region of males arranged in subventral and subdorsal pairs along the tail. Three caudal glands present, their nuclei are incaudal. Caudal glands open separately via three pores (this structure is obscure in some species).
Valid species
Mudwigglus macramphidium Leduc, 2013
Mudwigglus micramphidium sp. nov.
Mudwigglus minutus (Vitiello, 1972) comb. nov.
= Diplopeltula minuta Vitiello, 1972
Mudwigglus nellyae (Vincx & Gourbault, 1992)
= Diplopeltula nellyae Vincx & Gourbault, 1992
Mudwigglus patumuka Leduc, 2013
Mudwigglus plebeius Leduc, 2013
Nomenclatorial change
Diplopeltula minuta Vitiello, 1972 is here transferred to the genus Mudwigglus based on its close morphological affinities to M. plebeius, from which it can only be separated by features of male accessory apparatus (one or two setae in M. minutus vs one setae and two tubular supplements in M. plebeius).
Key to species of Mudwigglus Leduc, 2013
See Table 2 for additional diagnostic characters.
1. Gubernaculum apophysis absent ...................................................................................................... 2
– Gubernaculum apophysis present ..................................................................................................... 3
2. Amphid length/width ratio 3.5; spicules 23–25 µm long .............. M. macramphidium Leduc, 2013
– Amphid length/width ratio 2.2; spicules 15 µm long ............................ M. micramphidium sp. nov.
3. Tail conoid with clavate tip; c’-ratio> 3 ........................................................................................... 4
– Tail cylindrical with bluntly rounded tip; c’-ratio <3 ...................................................................... 5
4. Males with one precloacal setae and two tubular supplements .................. M. plebeius Leduc, 2013
– Males with one or two precloacal setae, tubular supplements absent ................................................. .............................................................................................. M. minutus (Vitiello, 1972) comb. nov.
5. Body longer than 0.7 mm; spicules 31–37 µm; vagina oblique .............. M. patumuka Leduc, 2013
– Body shorter than 0.4 mm; spicules 16–23 µm; vagina perpendicular .............................................. ................................................................................................ M. nellyae (Vincx & Gourbault, 1992)
description: Published as part of Holovachov, Oleksandr, 2017, Belgopeltula belgica (Vincx & Gourbault, 1992) gen. et comb. nov. and Mudwigglus micramphidium sp. nov. from the west coast of Sweden, and reappraisal of the genus Pseudaraeolaimus Chitwood, 1951 (Nematoda: Araeolaimida: Diplopeltidae), pp. 1-21 in European Journal of Taxonomy 383 (383) on pages 9-12, DOI: 10.5852/ejt.2017.383, http://zenodo.org/record/3839807