taxonID	type	description	language	source
F31B87C6FFCE8B194DD0FBD1FA8254FC.taxon	type_taxon	Type species: Decimodrilus diverticulatus sp. n.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCE8B194DD0FBD1FA8254FC.taxon	discussion	Included species: Decimodrilus diverticulatus sp. n.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCE8B194DD0FBD1FA8254FC.taxon	etymology	Etymology. Named after the characteristic tenth segment (decimus = tenth, Latin) in which the largest part of the intestinal diverticulum is located.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCE8B194DD0FBD1FA8254FC.taxon	diagnosis	Genus diagnosis. Maximum of 4 – 5 (6) chaetae per bundle. Chaetae straight or slightly bent in a bundle arranged in asymmetric fan of unequal size, those towards dorsal and ventral midlines of body gradually smaller. Head pore longitudinal slit on prostomium dorsally, often inconspicuous. In the ventral nerve cord perikarya continuous, also in the region of the septa. Brain truncated posteriorly, slightly incised anteriorly. Oesophageal appendages absent. Intestinal diverticula present or the gut widened abruptly with thickened epithelium in IX – X. Dorsal blood vessel origin in clitellar region, anterior bifurcation in segment I. Anteseptale of nephridia consisting of funnel only, efferent duct arises antero-ventrally or mid-ventrally. Coelomocytes one type, mucocytes. Male reproductive system simple, vas deferens long, not widened. Male pores in usual position in XII, with well-developed glandular bulbs. Spermathecae united proximally and connect jointly with the oesophagus dorsally. The new genus is similar in some traits to genera Bryodrilus, Enchytronia, Globulidrilus, Guaranidrilus, Henlea and Oconnorella, but for differences from these similar genera, see Table 1. Characteristic features of the new genus are the intestinal diverticula in IX – X and the longitudinal slit of the head pore. Henlea differs from the new genus chiefly by the preclitellar origin of the dorsal vessel, and the presence of oesophageal appendages (vs. absent in the new genus). In Bryodrilus and Oconnorella intestinal diverticula are absent (vs. present in the new genus), but most species of these genera have oesophageal appendages in VI or IV – VI, or VII (vs. absent); they are also absent in some species of Oconnorella. In Guaranidrilus the maximum number of chaetae is only 2 (vs. 4 – 6), the brain is incised posteriorly (vs. truncate), the spermathecae are free (vs. attached to oesophagus), and the head pore is on the prostomium (vs. at 0 / I). Globulidrilus has sigmoid chaetae (vs. straight) and intestinal diverticula are absent.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCD8B184DD0FEDEFC055630.taxon	description	(Figs 1 A – B, 2, 3, 6 A, C, E – F)	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCD8B184DD0FEDEFC055630.taxon	materials_examined	Holotype. NIBRIV 0000843108, slide No. 2575, adult, stained whole mounted specimen. Type locality. Soil of mixed forest, Mt. Chiaksan, Hakgok-ri, Socho-myeon, Wonju-si, Gangwon-do, South Korea (N 37 ° 23 ' 36.5 ", E 128 ° 03 ' 15.3 "), 395 m asl. Paratypes. In total 13 specimens, same data as for the holotype. NIBRIV 0000843109, slide No. 2557, NI- BRIV 0000843110, slide No. 2488, P. 122.1 – 122.9, slide No. 2487, 2489 – 2490, 2492, 2515, 2540 – 2541, 2556, 2576 adult, stained whole mounted specimen, P. 122.10. 2 adult specimens in 70 % ethanol. Further material examined. Two specimens for DNA analysis (1249, 1254). Etymology. It was named after the two small diverticula of the spermatheca. Diagnosis. (1) Small size (4.5 – 7 mm, in vivo), segments 24 – 33; (2) chaetae maximum 4 (5) per bundle, straight or slightly bent in a bundle arranged in asymmetric fan without nodulus; (3) five pairs of nephridia preclitellarly, anteseptale consisting of funnel only; (4) the dorsal lobes of pharyngeal glands in IV and V connected dorsally or touching each other, the third pair free, all with ventral lobes, one pair of secondary glands in VI; (5) dorsal blood vessel origin in XII, blood colorless; (6) intestinal diverticulum in IX – X; (7) sperm funnel expanded, pear-shaped 90 – 140 μm long, 2 – 3 times longer than wide (in vivo); (8) seminal vesicle absent; (9) spermatheca with 110 – 190 μm long and 16 – 20 μm wide ectal duct, one or two ectal glands, and a thin-walled ampulla with two diverticula-like protrusions and mostly two globular sperm mass in it; ampullae united proximally and connected jointly with the oesophagus; (10) 1 – 3 mature eggs at a time. Description. Small enchytraeid worm. Holotype 4.65 mm long, 220 µm wide at VIII and 280 µm at clitellum (fixed), 31 segments. Length of paratypes 4.5 – 7.0 mm, width 220 – 290 µm at VIII and 240 – 340 µm at clitellum in vivo, length of fixed specimens 3.1 – 4.3 mm, width 190 – 280 µm at VIII and 210 – 320 µm at clitellum, segments (24) – 29 – 33. Chaetal formula 3,4 – 4,3,2: 4,3, (5) – 4,3,2. Chaetae straight or slightly bent without nodulus, in a bundle arranged in asymmetric fan, those towards dorsal and ventral midlines of body gradually smaller (Fig. 2 E), e. g. 37, 34, 29, 24 µm long in the ventral bundle of segment X. Maximum of length 30 – 41 µm in preclitellar region and posterior segments alike and about 2.5 – 3 µm wide, absent in XII. Epidermal glands conspicuous in vivo and in fixed specimens alike, in 5 – 6 transverse rows (Fig. 2 C). Body wall 18 – 27 μm thick, cuticle less than 1 μm. Clitellum extending over XII – ½ XIII, saddle-shaped, absent midventrally with about 65 – 82 µm distance, thinner posteriorly (Fig. 2 G). Clitellar gland cells irregularly scattered (Fig. 2 F). Head pore 0 / I, longitudinal slit (Fig. 2 B). Brain (Fig. 2 A) about 100 – 140 μm long in vivo and 90 – 110 μm fixed, 1.5 – 2 times longer than wide, anteriorly slightly concave, posteriorly truncated. Oesophageal appendages absent. Postpharyngeal bulbs well developed. Pharyngeal glands united in IV and V dorsally, sometimes only touching each other, the third pair free, all with ventral lobes (Fig. 2 J), and one small pair of secondary glands in VI (Fig. 2 K). Intestinal diverticula in IX – 3 / 4 X, conspicuous when well-developed, as a fusion of four diverticula-like protrusions (Figs 3 A – B), sometimes only a widening is visible (Figs 3 C – D). 140 – 200 μm wide in vivo (160 – 250 μm when fixed) about 30 – 60 μm wider than wide the intestine before and after the diverticula. Chloragocytes about 15 – 25 μm high. Dorsal blood vessel from XII, blood colorless; the anterior bifurcation in peristomium. Five pairs of preclitellar nephridia from 6 / 7 to 10 / 11; anteseptale consisting of funnel only, efferent duct arises antero-ventrally (Figs 1 B, 2 H). Coelomocytes (Fig. 2 H, I) oval mucocytes, granulated, about 22 – 33 μm long in vivo and fixed. Midgut pars tumida in XVIII – XXIV occupying 3 – 4 segments (Fig. 2 L). Seminal vesicle absent. Sperm funnels (Figs. 3 E – G) expanded pear-shaped 90 – 140 μm long, 2 – 3 times longer than wide in vivo, (65 – 130 μm long and 1.2 – 3 times longer than wide in fixed specimens), often appears hyaline entally. The collar narrower than the funnel body. Diameter of sperm ducts 6 – 7 μm. Spermatozoa 70 – 120 μm long, heads 30 – 50 μm in vivo (40 – 65 and 17 – 18 μm fixed, respectively). Male glandular bulb (Figs 2 G, 3 H) compact, well developed, spherical, diameter about 80 – 90 μm in vivo (47 – 70 μm, fixed). Spermathecae (Figs 1 A, 3 I – K, 6 C, E – F) attached to the oesophagus. Ectal ducts 110 – 190 μm long and 16 – 20 μm wide in vivo [90 – 135 μm long (in one case, only 60 μm) and 15 – 17 μm wide, fixed], canal at orifice 2.5 – 3 μm wide, distally widening slightly at ampulla into 6 – 8 μm width in vivo, with one or two ectal glands (sometimes the two glands have different length: 19 – 39 μm) (Fig. 3 K). Ampullae onion-shaped, when fully mature with two diverticula-like protrusions and mostly two (occasionally three) globular sperm masses in it (Figs 6 E – F). Ampullae united proximally and connect jointly with the oesophagus; 1 – 3 mature egg at a time. Distribution and habitat. Only known from type locality in South Korea, at site 1: soil of mixed forest, Mt. Chiaksan, Hakgok-ri, Socho-myeon, Wonju-si, Gangwon-do (N 37 ˚ 23 ′ 36.50 ″, E 128 ˚ 03 ′ 15.30 ″), 395 m asl. Differential diagnosis. D. diverticulatus sp. n. is similar to D. globulatus sp. n. in many traits (size, segments number, intestinal diverticula in IX – X, the shape of brain, the number of preclitellar nephridia (5), the type of chaetae, the size and form of sperm funnels, secondary pharyngeal glands in VI, seminal vesicle absent). For the principal differences, see the differential diagnosis of D. globulatus sp. n.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCA8B114DD0FF36FF0253C0.taxon	description	(Figs 1 C – D, 4 – 5, 6 F, D, G – H)	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
F31B87C6FFCA8B114DD0FF36FF0253C0.taxon	materials_examined	Holotype. NIBRIV 0000843111, slide No. 2519 adult, stained whole mounted specimen. Type locality. Soil of Quercus mongolica forest, Mt. Gyebangsan, Nodong-ri, Yongpyeong-myeon, Pyeongchang-gun, Gangwon-do, South Korea (N 37 ° 42 ’ 27.9 ”, E 128 ° 29 ’ 02.3 ”), 848 m asl. Paratypes. In total 9 specimens, same data as for holotype. NIBRIV 0000843112, slide No. 2551, NI- BRIV 0000843113, slide No. 2533, + P. 123.1 – P 123.7 No. 2534, 2504, 2520, 2526, 2553, 2559, 2560. (No. 2533 = DNA 1224, No. 2534 = DNA 1215). Further material examined. Two subadult specimens. Etymology. Named after the sperm-rolls (globulus) in the spermathecal ampulla, globulatus (Latin) = globulecarrier. Diagnosis. (1) Small size (6.5 – 8.3 mm, in vivo), segments 31 – 33; (2) chaetae maximum 5 per bundle, straight or slightly bent in a bundle arranged in asymmetric fan without nodulus; (3) five pairs of nephridia preclitellarly, anteseptale consisting of funnel only; (4) the dorsal lobes of pharyngeal glands in IV connected dorsally, pairs in V connected or not, the third pair free, all with ventral lobes, one pair secondary glands in VI; (5) dorsal blood vessel origin in XII, blood colorless; (6) intestinal diverticulum in IX – X; (7) sperm funnel cylindrical 70 – 130 μm long, 1.7 – 3.5 times longer than wide (in vivo); (8) seminal vesicle absent; (9) spermatheca has a 110 – 150 μm long and 14 – 22 μm wide ectal duct with two ectal glands and a thin-walled ampulla; in ampulla, the sperm forms 2 – 3 sperm rolls; ental duct fused proximally and connect jointly with the oesophagus; (10) mostly 2 mature eggs at a time. Description. Small enchytraeid worm. Holotype 4.15 mm long, 240 µm wide at VIII and 280 µm at clitellum (fixed), 32 segments. Length of paratypes 6.5 – 8.3 mm, width 210 – 300 µm at VIII and 260 – 360 µm at clitellum in vivo, length of fixed specimens 3.6 – 6.0 mm, width 200 – 280 µm at VIII and 230 – 320 µm at clitellum, segments 31 – 33. Chaetal formula 3,4 – 4,3,2: 3,4,5, (6) – 4,3,2. Chaetae straight or slightly bent without nodulus, in a bundle arranged in asymmetric fan, those towards dorsal and ventral midlines of body gradually smaller (Fig. 4 D), e. g. 42, 40, 32, 31 µm long in ventral bundle of IX. Maximum length 36 – 42 µm in preclitellar region and posterior segments alike, width about 2.5 – 3 µm; chaetae absent in XII. Epidermal glands in 5 – 6 transverse rows (Fig. 4 C). Body wall 15 – 25 μm thick, cuticle less than 1 μm. Clitellum extending over XII – ½ XIII, girdle-shaped, gland cells irregularly scattered; larger hyaline gland cells are surrounded by smaller granular gland cells (Figs 4 I – J), absent midventrally between the bursal slits and before them, with about 60 – 85 µm distance, posteriorly the structure same kind as dorsally (Fig. 4 K). Head pore 0 / I, longitudinal slit (Fig. 4 E). Brain (Figs 4 A – B) about 110 – 130 μm long in vivo and 96 – 120 μm fixed, 1.5 – 2 times longer than wide, anteri- orly slightly concave, posteriorly truncated. Oesophageal appendages absent. Postpharyngeal bulbs well developed (Fig. 4 G). Pharyngeal glands united in IV and V dorsally, but sometimes only touching each other, the third pair free, all with ventral lobes, and one small pair of secondary glands in VI (Fig. 5 A). Intestinal diverticula in IX – 3 / 4 X, less developed than in D. diverticulatus sp. n. (Figs 5 E – H), 100 – 160 μm wide in vivo (110 – 160 μm when fixed) about 30 – 50 μm wider than wide the intestine before and after the diverticula. Chloragocytes about 15 – 25 μm high. Dorsal blood vessel from XII, blood colorless; the anterior bifurcation in peristomium. Five pairs of preclitellar nephridia from 6 / 7 to 10 / 11; anteseptale consisting of funnel only, efferent duct arises mid-ventrally (Figs 1 C, 4 H). Coelomocytes (Figs 5 B – C) oval mucocytes, granulated, about 24 – 40 μm long in vivo and 20 – 38 μm, when fixed. Midgut pars tumida in XVII – XXI occupying 2 – 3 segments. Seminal vesicle absent. Sperm funnels (Figs 5 I – J) cylindrical, 70 – 130 μm long, 1.7 – 3.5 times longer than wide in vivo, (50 – 110 μm long and 2 – 3 times longer than wide, when fixed); the collar narrower than the funnel body; diameter of sperm ducts 5 – 7 μm. Spermatozoa 80 – 110 μm long, heads 40 – 50 μm in vivo (spermathozoa 50 – 70 μm long, heads 15 – 22 μm in fixed specimens). Male glandular bulb (Figs 5 K – L) compact, well developed, about 115 – 140 μm long, 50 – 80 μm wide and 40 – 50 μm high in vivo (50 – 90 μm long, 40 – 90 μm wide, 50 – 60 μm high, fixed). Spermathecae (Figs 1 D, 6 B, D, G – H) attached to the oesophagus; ectal ducts 110 – 150 μm long and 14 – 22 μm wide in vivo (70 – 120 μm long and 15 – 18 μm wide, fixed), canal at orifice 3 μm wide, distally widening slightly at ampulla 5 – 8 μm wide in vivo with one or two 24 – 55 μm long stalked ectal glands. Ampullae thin-walled and onion-shaped, diameter 25 – 36 μm (22 – 32 μm, fixed), sperm arranged in 1 – 3 regular sperm rolls (Figs 6 D, G – H). Ampullae united proximally, ental duct about 25 – 50 μm long in vivo (20 – 25 μm fixed) and connects jointly with the oesophagus, the common duct 25 – 40 μm long. 2 – 3 mature eggs at a time. Distribution and habitat. Only known from type locality in South Korea, at site 2: Mt. Gyebangsan, Nodongri, Yongpyeong-myeon, Pyeongchang-gun, Gangwon-do (N 37 ° 42 ’ 27.9 ”, E 128 ° 29 ’ 02.3 ”), 848 m asl. Differential diagnosis. D. globulatus sp. n. similar to D. diverticulatus sp. n. in many traits, but slightly larger [6.5 – 8.3 m long vs. 4.6 – 6.9 mm long in vivo and 3.6 – 6.0 mm long vs. 3.1 – 4.3. mm respectively, when fixed)]. Other principal differences between D. diverticulatus sp. n. and D. globulatus sp. n. are as follows (character states of D. diverticulatus mentioned first): clitellum saddle shaped (Fig. 2 G) (vs. girdle shaped in posterior half, absent ventrally only between the bursal slits and before them) (Fig. 4 K); the spermathecal ampullae wider, with two diverticula-like protrusions, sperm-rolls absent, only 2 – 3 round sperm masses in them (vs. diverticula absent, sperm rolls in onion-shaped ampulla); the male copulatory organs smaller, 80 – 90 μm long (vs. 115 – 140 μm) in vivo, and the maximum number of chaetae in a bundle is four (only in the case of one specimen five) vs. often five (in one specimen 6 in a single bundle); moreover, the intestinal diverticula in IX – X are weakly developed in D. globulatus sp. n.	en	Dózsa-Farkas, Klára, Nagy, Hajnalka, Felföldi, Tamás, Hong, Yong (2019): Decimodrilus, a new enchytraeid genus from Korea (Annelida, Clitellata, Enchytraeidae). Zootaxa 4661 (2): 385-399, DOI: 10.11646/zootaxa.4661.2.7
