Heteronybelinia estigmena ( Dollfus, 1960 ) Palm, 2004

Palm, Harry Wilhelm & Haseli, Mohammad, 2023, Tentaculariids (Cestoda, Trypanorhyncha) of elasmobranchs from Malaysian Borneo, Zoosystema 45 (18), pp. 513-529 : 524

publication ID	https://doi.org/ 10.5252/zoosystema2023v45a18
publication LSID	lsid:zoobank.org:pub:D8CE9D4C-3A08-461C-8CAF-2E7220CAD04B
DOI	https://doi.org/10.5281/zenodo.8405481
persistent identifier	https://treatment.plazi.org/id/26538792-921B-D17C-FF3E-8FC8F5B58E81
treatment provided by	Plazi
scientific name	Heteronybelinia estigmena ( Dollfus, 1960 ) Palm, 2004
status

Treatment

Heteronybelinia estigmena ( Dollfus, 1960) Palm, 2004 View in CoL View at ENA

Nybelinia estigmena Dollfus, 1960: 831 View in CoL .

Heteronybelinia estigmena View in CoL – Palm 2004: 151.

MATERIAL EXAMINED. — Malaysia • 7 specimens; from Carcharhinus cf. leucas (Müller & Henle) (BO-75, 97, 101) ( Carcharhiniformes : Carcharhinidae ); Malaysian Borneo, off Sabah,; 06°01’10.32”N, 117°42’14.76”E; LRP 10976 -10982 GoogleMaps • 2 specimens; same data; ZMB E. 7717, 7718 • 4 specimens; from Carcharhinus cf. limbatus (Müller & Henle) (BO-54, 58); Malaysian Borneo, off Mukah , Sarawak; 02°53’52.16”N, 112°05’44.12”E; LRP 4372 -4374, 10975 GoogleMaps • 1 specimen; same data; ZMB E. 7716.

MEASUREMENTS

Long worms, 25 140-40 654 (30 112, N= 5) long with 188- 206 (197, N =2) proglottids. Scolex 787-1324 (1097, N= 5) long; scolex width 305-720 (585, N= 11, n= 11) at level of pars bothrialis, 348-549 (478, N =11, n= 1) at level of pars vaginalis, 305-518 (423, N=11, n=11) at level of pars bulbosa. Bothria 396-567 (469, N =11, n=13) long. Pars bothrialis 384-622 (494, N= 11) long; pars vaginalis 342-518 (424, N=11) long; tentacle sheaths 33-48 (43, N= 11, n= 11) in diameter. Pars bulbosa 348-451 (398, N= 11) long; bulbs 308-417 (350, N= 11, n = 27) long, 85-121 (103, N= 11, n= 27) wide, bulb width: length ratio 1.0: 2.9-4.3 (3.4, N=11, n=27); pars post-bulbosa present, 24-159 (72, N=11) long. Velum 165-305 (218, N = 11, n= 11) long. Scolex ratio (pars bulbosa: pars bothrialis: pars vaginalis) 1.0: 0.9-1.5: 0.8-1.3 (1.0: 1.2: 1.1, N=11).

Tentacles 528-690 (595, N= 11, n= 14) long with 31-36 (33, N =5, n=5) rows of hooks; tentacle width 27-39 (33, N= 11, n= 11) at level of basal region and 27-36 (32, N =11, n=11) at level of metabasal region. Metabasal armature homeoacanthous, heteromorphous; characteristic basal armature absent. Basal uncinate hooks on bothrial tentacle surface 8-10 (9, N = 5, n=5) long, base 10-12 (11, N= 5, n= 5) long; basal uncinate hooks on antibothrial tentacle surface 5-6 (6, N =5, n =5) long, base 7-8 (7, N=5, n= 5) long; metabasal uncinate hooks on bothrial tentacle surface 14-15 (15, N = 5, n= 5) long, base 13-14 (14, N=5, n =5) long; metabasal uncinate hooks on antibothrial tentacle surface 10-12 (11, N=5, n=5) long, base 9-10 (9, N =5, n=5) long. Number of hooks per half spiral row in basal and metabasal region of tentacle 5-6 (N=3, n =5).

Mature proglottids 66-78 (72, N=2) in number, 152-518 (387, N =8, n= 8) long, with maximum width of 281-793 (462, N =8, n=8). Cirrus sac 45-66 (52, N= 9, n= 9) long, 172-302 (236, N= 9, n =9) wide; cirrus sac length: width ratio 1.0: 3.3-6.0 (4.6, N= 9, n= 9). Testes 21-67 (39, N= 11, n =14) long, 16-43 (27, N =11, n =14) wide; testis number around 80 per proglottids (N=1), 3-9 (6, N=10, n=10) testes anterior to cirrus sac. Ovary 120-135 (127, N =2, n=2) long, 52-75 (64, N =2, n= 2) wide. Vitelline follicles 12-52 (25, N =11, n= 11) long, 9-18 (13, N= 11, n=11) wide.

REMARKS

Schaeffner & Beveridge (2014) reported H. estigmena from C. limbatus (BO-54, 58) off Malaysian Borneo. Heteronybelinia estigmena is a well described and a cosmopolitan tentaculariid species (see Palm 2004). The scolex measurements of the Malaysian Bornean specimens fall within the range of the measurements given by Palm (1999) and Palm & Beveridge (2002). This case is also seen for the measurements of the strobila.