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FIGURE 16 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 16. Eclipidrilus palustris (AB, GH, from the type series, Polk Co., Florida), (C, EF, Rock Springs Run, Florida), (D, Tootoosahatchee Creek, Florida). A—sagittal section of X, showing ventral pad and associated muscle. B—male pore, showing epidermal fold, with part of penis protruding; sagittal section. C—transverse section of penial structure. D—ental end of penial structure; sagittal section of a partially mature worm. E—spermathecal vestibule, from a transverse section. F—atrial ampulla, transverse section showing muscle layers and small prostate glands. Gental part of atrial ampulla, with outer muscle layer diagonal to the long axis; sagittal section. Hectal part of atrial ampulla, with outer muscle parallel to long axis. Abbreviations: ad—atrial duct; ef—epidermal fold; lm—longitudinaldiagonal muscle; mu—muscle; pe—penis; pp—penial papilla; ps—penial sac; tm—transversecircular muscle. Scale bars 50 µm.

FIGURE 15 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 15. Eclipidrilus palustris (A, Hogan's Branch, Florida), (B, Roaring Creek, Florida), (C, Tootoosahatchee Creek, Florida). A—ventral view of a highly contracted specimen, showing protruded penes. B—sagittal view of male pore with protruded penis. C—atrium and penial structure of a partially mature worm, sagittal view. Abbreviations: aa—atrial ampulla; ef—epidermal fold; pe—penis; pp—penial papilla; ps—penial sac. Scale bars 1 mm (A), 100 µm (B–C).

FIGURE 14 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 14. Head and pharynx of Eclipidrilus species; sagittal sections. A—E. pacificus, from Peavine Ridge, Oregon, showing the thin ventral wall of the pharynx. B—E. lacustris, from the Swan River, Montana; the pharynx is nearly as thick ventrally as dorsally.

FIGURE 13 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 13. Eclipidrilus lacustris, from Swan River, Montana (AE); E. ithys, from Spicket River, Massachusetts (F). A—muscle layers of atrial ampulla, sagittal section: fibers of inner, transversediagonal layer appear crosshatched in center, and as alternating layers in sagittally sectioned wall; thin outer layer has longitudinal fibers. B—transverse section of atrial ampulla and prostate glands; a vas deferens is embedded between the thin longitudinal muscle layer and the thick inner layer. C—male pore, showing ectal end of atrial duct and the collar of thickened epidermis; from a transverse section. D—spermathecal pore, showing end of duct with narrow, terminal sphincter, sagittal section. E—spermathecal ampulla and part of duct; thinwalled ectal part of ampulla is to the left, thickwalled ental part to the right; sagittal section. F—ectal part of atrial duct, showing undifferentiated lining cells. Abbreviations: ag—accessory gland; ep—epithelium; lm—longitudinal muscle; muPmuscle; sa—spermathecal ampulla; sd—spermathecal duct; sp—spermathecal pore; tmtransversediagonal muscle. Scale bars 50 µm.

FIGURE 12 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 12. Eclipidrilus frigidus (A, C–E, Big Spring at Bassets, California), (B,F, Jackass Creek, California). A—penial sac, with penis extruded through the papilla, into the sac; sagittal section of a mature worm. B—ectal end of penial structure of a nearly mature worm, with partially developed sac and papilla, and irregular lumen; sagittal section. C—penial structure near ectal end, showing fibrous epithelium; sagittal section of a mature worm. D—outer (longitudinaldiagonal) muscle layer of atrial ampulla, sagittal section of a mature worm. E—atrial ampulla, transverse section of a mature worm. F—ectal duct of spermatheca, showing ectal expansion of duct, sagittal section of a nearly mature worm. Abbreviations: lm—longitudinaldiagonal muscle; mu—muscle; pe—penis; pp—penial papilla; pr—prostate gland; ps—penial sac; tm—transversecircular muscle. Scale bars 50 µm.

FIGURE 11 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 11. Eclipidrilus frigidus (A, Rainy Day Creek, Idaho), (BC, I, Upper Butt Valley Creek, California), (DE, Jackass Creek, California), (F, H, North Fork Stanislaus River, California), (G, Little Gallagher Creek, Idaho). A—anterior segments of a whole worm, showing lateral papilla at 10/11. B—ventral view of a cleared, mature whole mount, showing coiled penes extruded through the male pores. C—partially protruded penis of a mature whole mount, showing outer muscle layer and coiled lumen. DE—partially mature worms; ectal ends of atrial ducts (outer muscle coat not shown), showing partial development of the penial sac from an undifferentiated male duct. F—a mature worm, showing the partially protruded penis within the penial sac. GH—spermathecae of mature worms, from dissections. I—spermatheca of partially mature worm, with welldeveloped duct. Abbreviations: de—spermathecal duct expansion; ef—epidermal fold; mp—male pore; pepenis; pp—penial papilla; ps—penial sac; sa—spermathecal ampulla. Scale bars 1 mm (A), 100 µm (BI).

FIGURE 10 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 10. Eclipidrilus pacificus, spermathecae, sagittal sections (AB, typical specimens, Hoh River, Washington), (CD, Variant 1, Peavine Ridge, Oregon). A—spermathecal vestibule. Bspermathecal ampulla, with ectal part containing darkstaining sperm to right and ental part to the left. C—part of spermathecal vestibule and ectal end of duct. D—spermathecal ampulla (with sperm in ental part), and vestibule. Abbreviations: lm—longitudinal muscle; sv—spermathecal vestibule; tm—thickened section of transverse muscle. Scale bars 50 µm.

FIGURE 9 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 9. Eclipidrilus pacificus, atrial ampullae (AC, typical specimens, Hoh River, Washington), (D, Variant 1, Peavine Ridge, Oregon). A—sagittal section. B—transverse section; the four vasa deferentia are visible inside the transversecircular muscle layer. C—sagittal section, detail of outer longitudinal and inner transversecircular muscle layers. D—transverse section of atrial ampulla, showing outer longitudinal and thin, transversecircular muscle layers. Abbreviations: lm—longitudinal muscle; pr—prostate gland; tm—transversecircular muscle. Scale bars 50 µm.

FIGURE 8 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 8. Eclipidrilus pacificus, male pores; sagittal sections (AB, typical specimens, Hoh River, Washington), (C, Variant 2 from Karlson Island, Columbia River), (D, Variant 1 from Peavine Ridge, Oregon). A—male pore and accessory glands. B—a partially protruded penis. Cpapilla and end of atrial duct, with accessory glands. D—papilla. Abbreviations: ag—accessory gland. Scale bars 100 µm.

FIGURE 7 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 7. Spermathecae of E. pacificus variants; lateral views from sagittally dissected, mated worms (A, Variant 1, Peavine Ridge, Oregon), (B, Variant 1, Middle Fork St. Maries River, Idaho), (C, Variant 1, Eugene, Oregon), (D, Variant 2, spring at Nestucca River, Oregon), (E–F, Variant 2, Karlson Island, Columbia River). D—arrangement of 3 spermathecae in IX and adjacent segments. E—anterior spermatheca of a 3spermatheca form. F—single, posterior spermatheca of a 1spermatheca form. Abbreviations: sa—spermathecal ampulla; sd—spermathecal duct; sv—spermathecal vestibule. Scale bars 200 µm.

FIGURE 6 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 6. Spermathecae of E. pacificus, typical specimens: lateral views from sagittally dissected worms (A, Hoh River, Washington), (BC, Calawah River, Washington), (D, South Naselle River, Washington). A—spermathecal ampulla extends posteriorly into XI. B—mature, unmated worm. C—partially mature worm. D—mated worm (sperm not shown). Abbreviations: sa—spermathecal ampulla; sd—spermathecal duct; sv—spermathecal vestibule. Scale bars 200 µm.

FIGURE 5 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 5. Male ducts of typical E. pacificus from the Hoh River, Washington, from dissections. A—atrial ampulla. B—ectal half of atrial duct showing transition from cuboidal epithelial cells to fibrous lining of penial structure. C—ectal end of atrial duct with columnar epithelial cells, from a partially mature worm. D—penis with fibrous, extruded epithelial cells, from a mature worm. Abbreviations: ep—epithelium; lm—longitudinal muscle; pr—prostate gland; tm—transversecircular muscle. Scale bars 200 µm (A–B), 100 µm (C–D).

FIGURE 4 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 4. Reproductive segments of E. pacificus, typical specimens, Hoh River, Washington, reconstructed from transverse sections. A—male pore and atrial duct in X; arrows indicate lateral positions of midpoints of chaetal pairs. B—spermathecal pores and ducts in IX. Abbreviations: ad—atrial duct; ag—accessory gland; mf—male funnel; sa—spermathecal ampulla; sd—spermathecal duct; sv—spermathecal vestibule. Scale bar 200 µm.

FIGURE 3 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 3. Reproductive segments of E. pacificus (A, typical specimen, Hoh River, Washington), (B, Variant 2, Knappa Slough, Columbia River). A—ventrolateral view, showing spermathecae and atrium (vasa deferentia and anterior funnels not shown), from a whole mount. B—ventral view (schematic) of a whole–mounted worm with three spermathecal pores, showing positions of spermathecae and atrium. Abbreviations: aa—atrial ampulla; ad—atrial duct; mf—posterior male funnel; mp—male pore; ov—ovary; sa—spermathecal ampulla; sp—spermathecal pore; ss—sperm sac; te—testis. Scale bars 500 µm.

FIGURE 2 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 2. Eclipidrilus pacificus (A–C, typical specimens, Hoh River, Washington), (D, typical specimen, Calawah River, Washington), (E, Variant 2, Warren Slough, Columbia River). A—chaetal bundles from two different worms: left, a ventral bundle in IX; right, a dorsal bundle in VI. Blateral view of segments I–V, from a cleared whole mount. C—lateral view, one of the lateral blood vessel pairs in LXXV. D—lateral view of a lateral blood vessel pair in LXVII. E—dorsal view of both lateral vessel pairs in LX. Scale bars 100 µm (A), 400 µm (B), 200 µm (C–E).

FIGURE 1 in A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America

FIGURE 1. Eclipidrilus pacificus, external characters (A–B, typical specimens, Hoh River, Washington), (C, Variant 1, Tenmile Creek, Oregon). A—lateral view of anterior segments. B—ventral view. C—lateral view. Abbreviations: mp—male pore; sp—spermathecal pore. Roman numerals indicate segment number. Scale bar 1 mm.

FIGURE 1 in New Eclipidrilus species (Annelida, Clitellata, Lumbriculidae) from southeastern North America

FIGURE 1. Eclipidrilus breviatriatus (A, C, specimens from Pettiford Creek; B, G, specimens from tributary to Naked Creek; D, E, F, specimens from Flat Creek). A–B, lateral view of anterior segments. C, paired chaetae: from left to right, segment III (ventral pair) and XXV (dorsal). D, paired chaetae: X (dorsal) and XII (ventral). E, reproductive segments IX–X, from dissected worm, facing left. F, spermatheca. G, atrium penetrating 10/11, with associated glands. Scale bars A–B 500 μm, C–D 50 μm, E–G 200 μm.

FIGURE 6 in New Eclipidrilus species (Annelida, Clitellata, Lumbriculidae) from southeastern North America

FIGURE 6. Eclipidrilus macphersonae (A–C, H, K–L, specimens from Lumber River; D–G, I–J, specimens from Naked Creek; all from sagittal sections). A, ectal part of spermathecal ampulla. B–C, ental (vacuolate) part of spermathecal ampulla; sperm visible within epithelial vacuoles in B. D–E, spermathecal vestibules. F–G, penial structures, with extruded penes. H–K, atrial ampullae; faint transverse and diagonal muscle fibers visible in K. L, ectal duct of atrium. Scale bars: 100 μm.

FIGURE 4 in New Eclipidrilus species (Annelida, Clitellata, Lumbriculidae) from southeastern North America

FIGURE 4. Eclipidrilus microthecus (G, specimen from Pettiford Creek, whole mount; all others from tributary to Naked Creek, A from a whole mount, others from sections). A–C, ectal part of spermathecal duct and vestibule: B shows the outer vestibule; C shows the ental part of the vestibule, with muscular ring. D, spermatheca. E, atrial duct and base of ampulla. F, sagittal section of atrial ampulla, with ental end and "prostate" to the right. G, atrial ampulla as seen in whole mount. H, transverse section of atrial ampulla, showing muscle layers and narrow lumen. I, ectal end of atrial duct and penial structure with (faint) penis. Scale bars: 100 μm.

FIGURE 5 in New Eclipidrilus species (Annelida, Clitellata, Lumbriculidae) from southeastern North America

FIGURE 5. Eclipidrilus macphersonae (A, E, specimens from Lumber River; D, F, G, specimens from Naked Creek; B, C, specimen from Flat Creek). A–B, lateral view of anterior segments. C, reproductive segments IX–XI, from a mature worm, facing right. D, spermatheca of a recently-mated worm, with sperm only in the ectal part. E, reproductive segments IX–X, showing genital pores and spermatheca of a fully mature worm, facing right. F, reproductive segments IX–XI, from an unmated worm, facing left. G, paired chaetae: from left to right, segment VI (ventral pair), XII (dorsal), and XX (ventral). Scale bars: A–B 500 μm, C–F 200 μm, G 50 μm.