Alluroides brinkhursti brinkhursti Jamieson 1968

Jamieson, Barrie G. M. & Fragoso, Carlos, 2024, A monograph of the Oligochaete family Alluroididae, Zootaxa 5529 (3), pp. 401-435 : 415

Alluroides brinkhursti brinkhursti Jamieson 1968 (see Figs 4 , 5 )

Alluroides tanganyikae Beddard (part.) Brinkhurst 1964: 528, Figs. 1–3 , Pl. 1, Fig. 1–2 , Pl. 2, Fig. 1–2 .

Alluroides brinkhursti brinkhursti Jamieson 1968:76 , Fig. 13 ; Brinkhurst & Jamieson 1971: 711–712, Fig. 14. 3A , Frontispiece A–D.

(Non) A. tanganyikae Beddard 1906: 215 . Michaelsen 1913: 7; 1914 a: 89; 1914b: 165; 1935: 36.

Length 35–45 mm, width 1–1.5 mm, segments 150. Length of a lateral seta from XV ental to the node, 0.109 mm. in XI, aa: ab:bc:cd:dd =3.7:1.0:3.1:1.0:3.6; dd=0.21 u; bc: aa =0.8. Clitellum annular in 1/2XII to XV. Male pores ventrolateral in XIII, just dorsal to b. Female pores in line with the male pores immediately behind furrow 13/14. Spermathecal pore single, mid–dorsal on IX just behind 8/9 on a prominent papilla.

Septa very muscular from 4/5–9/10 inclusive; 3/4 not apparent; 10/11 dorsally partially thickened, mostly evaginated posteriad as a very thin–walled seminal vesicle; 11/12 and 12/13 only slightly thickened; 13/14 posteriad not appreciably thickened. Intestine beginning in XVI. Chromophil septal glands in V–VIII, attached to posterior septa. Nephridia commencing in XV or XVI. Testes ventral on the anterior wall of X. No testis–sacs apparent. Seminal vesicle almost filling XI. Sperm funnels posterior and ventral in X facing anteriorly and dorsally to serve both X and the seminal vesicle. Atria large and globular, almost filling XIII; 0.347 mm wide narrowing ectally to 0.204. mm. Each with lining epithelium surrounded by a thick muscular sheath outside which, but not closely adherent, are tongues of unicellular gland cells which communicate with the atrial lumen by a large number of small ductules which penetrate the muscular layer. Penis eversible and elongate. Ovaries in XIII, on its anterior wall; funnels on its posterior wall, penetrating 13/14. Ovisac extending posteriad into XVI. Mature oocytes large and yolky. Nephridia commencing in XV or XVI. Spermatheca 0.138 mm wide, single, lying recurved in IX.

Distribution. Uganda, Mt. Elgon, in tributaries of the Kiriki River, which flows into Lake Okolitorom.

Figures

FIGURE 1A. Hennigram (morphological phylogram) for all families of the opisthoporous oligochaetes constructed by nearestneighbour clustering. For details see Jamieson (1978). Redrawn.

FIGURE 2. A phylogenetic classification of the Clitellata. (From Jamieson 2006).

FIGURE 3. Brinkhurstia americanus (Brinkhurst 1964). Longitudinal section through the male terminalia. at.ch, terminal chamber of atrium; at.d, atrial duct; gl.sh, glandular sheath; m.sh, muscular sheath; o.v, ovary; pro, protractor muscle; p.s, penial seta; re, retractor muscle; sep, septum; v.d, vas deferens. From Jamieson (1968).

FIGURE 4. Alluroides brinkhursti brinkhursti Jamieson (1968). Longitudinal section of the holotype. Abbreviations: br, brain; bv, blood vessel; m, mouth; msh, muscular sheath of atrium; oe, oesophagus; oo, oocyte: os, ovisac; ph m, pharyngeal musculature; pr c, prostatic cells; sep, septum; sep gl, septal gland; sp p, spermathecal pore; s. ves, seminal vesicle; sp, spermatheca; sp f, sperm funnel; tes, testis; vd, vas deferens; v n, ventral nerve cord. Adapted from Jamieson (1968).

FIGURE 5. Alluroides brinkhursti brinkhursti Jamieson (1968). A. Transverse section (TS) of clitellum, showing single cell layer; the cells with conspicuous secretory granules and each with a basal nucleus. B. TS through the wall of the atrium, showing a group of atrial gland cells with ductule penetrating the muscular sheath of the atrium. C. Longitudinal section through the male pore, showing the ectal end of the atrium, which forms a penis with muscular sheath, ciliated epithelium and rope of spermatozoa in the lumen, forming in the ectal chamber a sperm mass. D. Alluroides pordagei. Oblique section through the atrial bulb, containing a large sperm mass, and the associated atrium. From Jamieson (2006).

FIGURE 13. Kathrynella guyanae Omodeo 1996.A. Ventral view of anterior segments.Note the pale lateral line.B. arrangement of genital organs. Abbreviations: a, atrium; gp, genital papilla; ♂, male pore; sp, spematheca; t, testis; ts, thickened septum. The penial setae are seen projecting from the male pore. Modified from Omodeo (1996).

FIGURE 14. Lacandodrilus paludosus Fragoso & Rojas 2023. A. External view of the anterior ventral region of a clitellate adult. B. Internal view of the anterior region of an adult. C. Spermatheca. Abbreviations: a, ampulla: clit, clitellum; d, duct; dv, dorsal vessel; gg, genital glands (prostates?); img, internal male gonoducts; mf, male funnels; n, nephridia; oe, oesophagus; sg, septal glands. Modified from Fragoso & Rojas (2023).