Bolbonema zildae, Larrazábal-Filho & Neres & Esteves, 2018

Larrazábal-Filho, Alexandre L., Neres, Patrícia F. & Esteves, André M., 2018, The genus Bolbonema Cobb, 1920 (Nematoda: Desmodoridae): emended diagnosis, key to males, and description of three new species from the continental shelf off northeastern Brazil, Zootaxa 4420 (4), pp. 551-570 : 558-566

publication ID

https://doi.org/ 10.11646/zootaxa.4420.4.6

publication LSID

lsid:zoobank.org:pub:6AD47FC7-2313-44C3-8CA6-3CD723ACE125

DOI

https://doi.org/10.5281/zenodo.5975348

persistent identifier

https://treatment.plazi.org/id/03F1842C-B715-FFF1-FF62-F896F022FD21

treatment provided by

Plazi

scientific name

Bolbonema zildae
status

sp. nov.

Bolbonema zildae View in CoL sp. n.

(measurements in Table 3, Figures 8 View FIGURE 8 , 9 View FIGURE 9 and 10 View FIGURE 10 ).

Type material: Holotype Male adult MNRJ 394 View Materials . Station CM 6 (05°01'21.2''S, 36°12'18.7''W). GoogleMaps

Paratype female: Adult, MNRJ 395. Station ME1A1 (05°01'17.9''S, 36°23'31.8''W).

Other paratypes: 9 females (232 and 236 LMZOO-UFPE), 8 males (237–241 LMZOO-UFPE) and 4 J1, 3 J2 and 3 J3 (242 LMZOO-UFPE), data as for holotYpe GoogleMaps .

Etymology. The species name is a tribute to Zilda Lacerda, the first author’s grandmother.

Description. HolotYpe ( Figures 8 View FIGURE 8 and 9 View FIGURE 9 ). BodY cYlindrical, Yellowish brown. Cuticle annulated eXcept in final portion of tail, no lateral differentiation. Eight longitudinal rows of somatic setae; two subdorsal, two subventral and four sublateral. TheY start from cervical region to level of cloaca, alternating in long setae with shorter setae. Head capsule well developed with thick cuticle without annulations. Anterior sensilla arrangement: siX outer labial papillae (difficult to see) and four cephalic setae positioned at middle level of fovea amphidialis. Fovea amphidialis spiral with 1.25 turns. Fovea amphidialis occupYing 46% of diameter of head ( Fig 8B View FIGURE 8 ). Buccal cavitY small, with one dorsal tooth and one small ventral tooth, not alwaYs visible. PharYnX muscular with well-developed posterior bulb. Cardia and eXcretorY-secretorY sYstem not observed. Nerve ring located 58.5 µm from anterior region. Reproductive sYstem monorchic, with single anterior testis situated to left of intestine, outstretched. Sperm cells large ( Fig 8A View FIGURE 8 ). Spicules arched, proXimal region bean-shaped. Velum present. Gubernaculum with dorsal apophYsis and distal portion enfolding spicules ( Fig 8E View FIGURE 8 ). Velum present. Supplements absent. Tail conical, with three small caudal glands and spinneret.

ParatYpe female ( Figures 9 View FIGURE 9 and 10 View FIGURE 10 ). Similar to male. Female didelphic, ovaries antidromouslY refleXed and both genital branches to right of intestine. Vulva as simple transverse slit-like aperture. ProXimal portion of vagina heavilY cuticularised, proXimal portion of vagina surrounded bY constrictor muscle ( Fig 9E View FIGURE 9 ). Globular sperm cells visible. Two eggs found. Vulva located at 43% of total bodY length (520 µm distant from anterior end). Tail conical.

Juveniles ( Figure 10 View FIGURE 10 ). Similar to adults, eXcept lacking some characteristics such as supplements; reproductive sYstem immature. Juveniles in stage 1 without rows of somatic setae. Ten juveniles were found, four in stage 1, three in stage 2 and three in stage 3.

Diagnosis. Bolbonema zildae sp. n. is characteriZed bY the fovea amphidialis spiral with 1.25 turns. Spicules arched, proXimal region bean-shaped. Velum present. Gubernaculum well developed, hook-shaped, enfolding distal region of spicules.

Differential diagnosis. Bolbonema zildae sp. n. can be compared onlY with the species Bolbonema spiralis Hourston & Warwick, 2010 , in the shape of the fovea amphidialis and the absence of supplements. It differs in the shape of the spicules: B. zildae sp. n. has arched spicules with the proXimal region bean-shaped, the velum present, and the gubernaculum with a dorsal apophYsis; while B. spiralis has the proXimal region of the spicules simple, without cephalation, and a laminar gubernaculum.

Bolbonema zildae View in CoL sp. n. differs from B. papillae View in CoL sp. n. and B. braziliensis View in CoL sp. n. in the absence of supplements and the spiral fovea with 1.25 turns. Two other species that differ are B. brevicolle Cobb, 1920 View in CoL and B. longisetosum ( Jensen, 1985) View in CoL , both of which have a crYptospiral fovea amphidialis. Moreover, B. longisetosum View in CoL has 24 supplements (absent in B. zildae View in CoL sp. n.). B. brevicolle View in CoL has verY different spicules, the proXimal region without cephalation, and a laminar gubernaculum.

Kingdom

Animalia

Phylum

Nematoda

Class

Chromadorea

Order

Desmodorida

SubOrder

Desmodorina

SuperFamily

Desmodoroidea

Family

Desmodoridae

SubFamily

Desmodorinae

Genus

Bolbonema

Loc

Bolbonema zildae

Larrazábal-Filho, Alexandre L., Neres, Patrícia F. & Esteves, André M. 2018
2018
Loc

Bolbonema zildae

Larrazábal-Filho & Neres & Esteves 2018
2018
Loc

B. papillae

Larrazábal-Filho & Neres & Esteves 2018
2018
Loc

B. braziliensis

Larrazábal-Filho & Neres & Esteves 2018
2018
Loc

B. zildae

Larrazábal-Filho & Neres & Esteves 2018
2018
Loc

B. longisetosum (

Jensen 1985
1985
Loc

B. brevicolle

Cobb 1920
1920
Loc

B. brevicolle

Cobb 1920
1920
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