Helobdella eriensis, Saglam & Kutschera & Saunders & Saidel & Balombini & Shain, 2018

Saglam, Naim, Kutschera, Ulrich, Saunders, Ralph, Saidel, William M., Balombini, Katherine L. W. & Shain, Daniel H., 2018, Phylogenetic and morphological resolution of the Helobdella stagnalis species-complex (Annelida: Clitellata: Hirudinea), Zootaxa 4403 (1), pp. 61-86 : 70

Helobdella eriensis n. sp.

( FPWS 2-Farm Pond)

( Figs. 2 D-7D)

(Holotype: ANSP GI 19494)

(LSID: urn:lsid:zoobank.org:act:91CD93B2-3B58-42C9-B640-9C92FD8827CC)—

Dorsal body light to yellowish-grey, sometimes with greenish tint. Ventral same as H. serendipitious n. sp. Total of 67 annul; I, II, III uniannulate, IV, V biannulate, VI-XXIII triannulate, XXV biannulate, XXVI-XXVII uniannulate. One pair of small, elliptical eyes clearly separated on segment III ( Fig. 7D ). Male and female gonopores between XI a2/a3 (24th/25th annuli) and XIa3/XIIa1 (25th/26th annuli), respectively; clitellum between XI-XIIth segments. Six pairs of testisacs intersegmentally arranged, located as in H. modesta . Ejaculatory bulbs similar to H. stagnalis, Ovisacs in XII segment large, connected with long and curled common oviduct. Oviduct shorter than ovisac ( Figs. 2D , 4D ). Six pairs of crop caeca, 6th directed backwards and short extending up to fourth intestinal caecum. Four pairs of intestinal caecum, first three curved slightly upward and fourth curved downward. Rectum is long with twisted “S” shape ( Figs. 3D , 5D ).

Figures

FIGURE 2. Position of reproductive morphology of Helobdella species. A, Helobdella stagnalis; B, Helobdella modesta; C, Helobdella serendipitous n. sp.; D, Helobdella eriensis n. sp.; E, Helobdella echoensis n. sp. ac: atrial cornua; an, anus; e, eyes; fg, female gonopore; ic, intestinal caecum; mg, male gonopore; od, oviduct; os: ovisac; ps, posterior sucker; r, rectum; s, scute; sd, sperm duct; t, testisac, vd. vas deferens.

FIGURE 3. Position of digestive system of Helobdella species. A, Helobdella stagnalis; B, Helobdella modesta; C, Helobdella serendipitous n. sp.; D, Helobdella eriensis n. sp.; E, Helobdella echoensis n. sp. ac: atrial cornua; an, anus; cc, corp caecum; e, eyes; ic, intestinal caecum; p, proboscis;ps, posterior sucker; r, rectum; s, scute.

FIGURE 4. Dorsal view of reproductive system of Helobdella species. A, Helobdella stagnalis; B, Helobdella modesta; C, Helobdella serendipitous n. sp.; D, Helobdella eriensis n. sp.; E, Helobdella echoensis n. sp. a, atrium; ac: atrial cornua; os: ovisac; od, oviduct; sd, sperm duct; t, testisac, vd. vas deferens.

FIGURE 5. Digestive system of Helobdella species. A, Helobdella stagnalis; B, Helobdella modesta; C, Helobdella serendipitous n. sp.; D, Helobdella eriensis n. sp.; E, Helobdella echoensis n. sp. an, anus; cc, corp caecum; ic, intestinal caecum, r, rectum.

FIGURE 7. Eye position and shape of Helobdella species. A, Helobdella stagnalis; B, Helobdella modesta; C, Helobdella serendipitousn. sp.; D, Helobdella eriensis n. sp.; E, Helobdella echoensis n. sp.