-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 1.Schematic of shell shapes, last whorl expansion and parietal lamella shape. Terminology of Discartemon apertural dentition in figure B. A–C Shell form and spire A flattened shell with concave spire B depressed-heliciform shell with only slightly convex spire, and C globose-heliciform with conical spire D–F Last whorl expansion D rapidly expanded E intermediately expanded, and F regularly expanded G–I Parietal lamella form G single lamella with straight shape (typical) H single lamella with curved shape (sinuous), and I modified with “Y” shaped lamella.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 11.Genitalia and pallial complex. A–C Discartemon discus CUMZ 6257, from Vietnam A reproductive system B insertion of vas deferens into penial sheath, and C circular and excretory systems and mantle edge D, E Discartemon nummus CUMZ 6208, from Patthalung D reproductive system, and E insertion of vas deferens into penial sheath.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 22.Radula morphology of A Discartemon discus CUMZ 6257, from Da Nang, Vietnam B Discartemon nummus CUMZ 6208, from Patthalung C Discartemon hypocrites, topotype CUMZ 6199 D Discartemon afthonodontia sp. n., paratype CUMZ 6210 E Discartemon roebeleni, topotype CUMZ 6217 F Discartemon kotanensis sp. n. paratype CUMZ 6230 G Discartemon megalostraka sp. n. paratype CUMZ 6233 H Discartemon triancus sp. n. paratype CUMZ 6236.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 2.Living snails. A Discartemon nummus CUMZ 6208, from Patthalung (shell width about 6 mm) B Discartemon discadentus sp. n. paratype CUMZ 6209 (shell width about 12 mm) C Discartemon leptoglyphus CUMZ 6007, from Ipoh, Perak, Malaysia (shell width about 6 mm) D Discartemon hypocrites topotype CUMZ 6199 (shell width about 6 mm) E, F Discartemon afthonodontia sp. n. E paratype CUMZ 6210 (shell width about 9 mm), and F specimen CUMZ 6214, from Tam Khao Phlu, Chumphon (shell width about 8 mm).
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 11.Genitalia and pallial complex. A–C Discartemon discus CUMZ 6257, from Vietnam A reproductive system B insertion of vas deferens into penial sheath, and C circular and excretory systems and mantle edge D, E Discartemon nummus CUMZ 6208, from Patthalung D reproductive system, and E insertion of vas deferens into penial sheath.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 17.Internal sculpture of genitalia. A–E Discartemon nummus CUMZ 6208, from Patthalung A details of atrium surface B low magnification shows arrangement of penial hooks C high magnification of penial hooks D top view of penial hooks, white arrow indicate tip of hook, and E arrangement of vaginal folds F–I Discartemon discadentus sp. n., paratype CUMZ 6209 F details of atrium surface G high magnification of penial hooks with (inset) shows in low magnification H top view of penial hook, and I arrangement of reticulated vaginal folds.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 22.Radula morphology of A Discartemon discus CUMZ 6257, from Da Nang, Vietnam B Discartemon nummus CUMZ 6208, from Patthalung C Discartemon hypocrites, topotype CUMZ 6199 D Discartemon afthonodontia sp. n., paratype CUMZ 6210 E Discartemon roebeleni, topotype CUMZ 6217 F Discartemon kotanensis sp. n. paratype CUMZ 6230 G Discartemon megalostraka sp. n. paratype CUMZ 6233 H Discartemon triancus sp. n. paratype CUMZ 6236.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 2.Living snails. A Discartemon nummus CUMZ 6208, from Patthalung (shell width about 6 mm) B Discartemon discadentus sp. n. paratype CUMZ 6209 (shell width about 12 mm) C Discartemon leptoglyphus CUMZ 6007, from Ipoh, Perak, Malaysia (shell width about 6 mm) D Discartemon hypocrites topotype CUMZ 6199 (shell width about 6 mm) E, F Discartemon afthonodontia sp. n. E paratype CUMZ 6210 (shell width about 9 mm), and F specimen CUMZ 6214, from Tam Khao Phlu, Chumphon (shell width about 8 mm).
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 4.Shells of Group I: Discartemon discus-group. A–C Discartemon discus A holotype NHMUK 20130684 B lectotype SMF 108534 of “Streptaxis paradiscus Möllendorff, 1900”, and C specimen CUMZ 6001, from Vietnam with apertural dentition D Discartemon planus specimen NMW 1955.158.25252, from Sulawesi, Indonesia E, F Discartemon sykesi E paratype NMW 1955.158.25257, and F paratype NHMUK 1937.7.9.11 G Discartemon nummus CUMZ 3594, from Patthalung with apertural dentition H Discartemon khaosokensis holotype CUMZ 6242 with apertural dentition I, J Discartemon discadentus sp. n. I holotype CUMZ 6244 with apertural dentition, and J paratype CUMZ 6209.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 12.Genitalia. A, B Discartemon discadentus sp. n. paratype CUMZ 6209 A reproductive system, and B insertion of vas deferens into penial sheath C, D Discartemon hypocrites topotype CUMZ 6199 C reproductive system, and D insertion of vas deferens into penis sheath.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 17.Internal sculpture of genitalia. A–E Discartemon nummus CUMZ 6208, from Patthalung A details of atrium surface B low magnification shows arrangement of penial hooks C high magnification of penial hooks D top view of penial hooks, white arrow indicate tip of hook, and E arrangement of vaginal folds F–I Discartemon discadentus sp. n., paratype CUMZ 6209 F details of atrium surface G high magnification of penial hooks with (inset) shows in low magnification H top view of penial hook, and I arrangement of reticulated vaginal folds.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 5.Shells of Group I: Discartemon discus-group. A, B Discartemon discamaximus sp. n. A holotype CUMZ 6245 with apertural dentition, and B paratype CUMZ 6005 C, D Discartemon circulus sp. n. C holotype CUMZ 6246 with apertural dentition, and D paratype CUMZ 3665 E, F Discartemon deprima sp. n. E holotype CUMZ 6247 with apertural dentition, and F paratype CUMZ 3573 G, H Discartemon expandus sp. n. G holotype CUMZ 6248 with apertural dentition, and H paratype CUMZ 3664.
-
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 23.Approximate locations of the type locality of Discartemon species. (1) Discartemon discus, (2) Discartemon planus, (3) Discartemon sykesi, (4) Discartemon nummus, (5) Discartemon khaosokensis, (6) Discartemon discadentus sp. n., (7) Discartemon discamaximus sp. n., (8) Discartemon circulus sp. n., (9) Discartemon deprima sp. n., (10) Discartemon expandus sp. n., (11) Discartemon plussensis, (12) Discartemon hypocrites, (13) Discartemon leptoglyphus, (14) Discartemon platymorphus, (15) Discartemon afthonodontia sp. n., (16) Discartemon epipedis sp. n., (17) Discartemon flavacandida sp. n., (18) Discartemon lemyrei, (19) Discartemon roebeleni, (20) Discartemon collingei, (21) Discartemon stenostomus, (22) Discartemon sangkarensis, (23) Discartemon vandermeermohri, (24) Discartemon kotanensis sp. n., (25) Discartemon megalostraka sp. n., (26) Discartemon triancus sp. n., and (27) Discartemon conicus sp. n.