Encentrum uncinatum ( Milne, 1886 )

Song, Min Ok, 2014, Eight new records of monogonont and bdelloid rotifers from Korea, Journal of Species Research 3 (1), pp. 53-62 : 54-55

publication ID

https://doi.org/ 10.12651/JSR.2014.3.1.053

persistent identifier

https://treatment.plazi.org/id/8B770568-FFB9-FFA7-B43F-F9C0FD7B0B9D

treatment provided by

Felipe

scientific name

Encentrum uncinatum ( Milne, 1886 )
status

 

2. Encentrum uncinatum ( Milne, 1886) View in CoL ( Fig. 1 View Fig D-F)

Diglena uncinata Milne, 1886, p. 141 , pl. 2, figs. 1, 2, 8.

Dicranophorus uncinatus : Donner, 1964, pp. 283-284, figs. 20a-d; Koste, 1978, p. 466, pl. 169, figs. 12a-d, pl. 172, figs. 7a-d.

Encentrum uncinatum View in CoL : De Smet, 1997, p. 161, figs. 434- 440, pl. 25, figs. 1-4.

Material examined. 8 specimens, a mountain in Gyo-1- dong, Gangneung-si, Gangwon-do (leaf litter, Min Ok Song), 26 Feb, 2013.

Description. Body elongate, half-moon-shaped and flattened laterally. Trunk subcylindrical, rather flat ventrally, convex dorsally, and with laterodorsal longitudinal folds. Transverse folds defining body into head, trunk and foot. Integument thin, smooth and transparent, but body outline rather fairly constant. Head big, about 2/5 of body length except toes. Eye-spots absent. Rostrum large, broad, triangular and decurved. Foot conical and 1/3 of trunk length. Toes sword-shaped, long and about 2-fold of foot length. Retrocerebral sac and duct present. Trophi forcipate type. Rami outline pyriform, each sickle-shaped and terminating into a long, tapering and incurved tooth; a needle-like preuncinal tooth emerging from outer margin and projecting towards axis of trophi at about 1/3 from a tip. Fulcrum short, about 1/3 of ramus length. Unci single-toothed, about 3/5 of manubria length. Intramallei short, with round base and tapering ends. Supramanubria large, thin, rhomboid-ovate and tapering into short needle-like tips distally. Manubria long, about 3-fold of fulcrum length, rod-shaped, curved and knobby distally and proximally.

Body length 250 μm, toe length 70 μm; trophi length 30 μm.

Distribution. Cosmopolitan, but, not recorded from Korea before.

Remarks. De Smet (1997) proposed that the genus Dicranophorus should only include species characterized by: elongate basal and subbasal chambers forming a dense conglomerate; basal chamber opening laterally; subbasal chamber opening ventrally; intramallei absent; unci single-toothed, interlocking with dorsal apical ramus tooth or its cardal apophyse and a cardal apophyse ventrally. Since the trophi parts of Dicranophorus uncinatus have characteristics different from those mentioned above, De Smet (1997) transferred it to genus Encentrum .

Kingdom

Animalia

Phylum

Rotifera

Class

Eurotatoria

Order

Ploima

Family

Dicranophoridae

Genus

Encentrum

Loc

Encentrum uncinatum ( Milne, 1886 )

Song, Min Ok 2014
2014
Loc

Encentrum uncinatum

De Smet, W. H. 1997: 161
1997
Loc

Dicranophorus uncinatus

Koste, W. 1978: 466
1978
Loc

Diglena uncinata

Milne, W. 1886: 141
1886
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