Homatula wuliangensis Min &amp; Yang &amp; Chen 2012, sp. nov.
Creators: name: Min, Rui
name: Yang, Jun-Xing
name: Chen, Xiao-Yong
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Cypriniformes
Nemacheilidae
Homatula
Homatula wuliangensis

description: <i>Homatula wuliangensis</i> sp. nov. (Fig. 1) <b>Holotype.</b> KIZ 2008008158, 1 ex., 181.9 mm SL; Wuliang Mountain (24°17'26.6"N; 100°39'03.6"E – 24°20'37.5"N; 100°41'18.2"E, 1274–1781 m above sea level), Lancang River, at Jingdong County, Pu-Er City, China, 13 Dec. 2008. <b>Paratypes.</b> KIZ 2008008156–157 (2), 159–172(14), 175–176(2), 179(1), 184(1), 197(1), 199–201(3), 203(1), 205(1), 207(1), 211(1), 214–215(2), 316–318(3), 33 ex., 64.6–191.1 mm SL, locality data as for holotype. <b>Diagnosis.</b> A species of <i>Homatula</i> with extremely longe upper lobe of caudal fin relative to lower lobe; adipose keel developed as high and long ridge, extending anteriorly almost to posterior margin of dorsal-fin base; very closely aligned lateral bars on body, numbering more than 22 (22–26); body scaled; vertebrae 4+41(8)–42(2). <b>Description.</b> Counts and proportional measurement are shown in Table 1. Body elongate, anterior portion subcylindrical, posterior portion compressed, body depth 16.2% (15.2–18.0%) SL. Body entirely covered by small scales, with scattered scales on breast. Dorsal and ventral profiles almost straight. Anus at least one diameter to anal-fin base. Head slightly depressed, naked, length 20.6% (18.5–22.9%) SL; snout blunt, length 44.8% (42.9–47.1%) HL; anterior nostril forming a valve, close to posterior nostril. Eye ovoid, horizontal axis longest, slightly closer to snout tip than to posterior margin of operculum. Interorbital width 28.6% (27.2–30.1%) HL. Mouth inferior, upper jaw with a median <i>processus dentiformis</i> (defined by Kottelat 1990); lower jaw lacking a notch. Three pairs of barbels; inner rostral barbels not reaching mouth corner; outer rostral barbels extending to mouth corner; maxillary barbels extending to middle of eye. Lateral line complete and straight, with 114–115 pores. Cephalic lateralis system with 7 supraorbital, 4+11 infraorbital, 9 preoperculomandibular and 3 supratemporal pores.Vertebrae 4+41(8 specimens)–42(2 specimens). Dorsal-fin margin straight, with iii, 8 1 / 2 rays. Tip of dorsal fin extending close to or reaching vertical line from anus. Pectoral fin with i, 9–10 rays. Pectoral fin extending about 1 / 3 distance from its origin to pelvic-fin origin. Pelvic fin with i, 7 rays. Origin of pelvic fin under vertical from dorsal-fin origin. Pelvic fin extending half of distance from its origin to anal-fin origin, but not reaching anus. Prepelvic length 48.8% (47.4–51.4%) SL. Pelvic axillary lobe with pointed tip. Anal fin with iii, 5 1 / 2 rays. Anal fin reaching less than 1 / 2 distance from anal-fin origin to caudal-fin base. Caudal fin without spots; fin rounded with upper lobe clearly longer than lower lobe; lower-lobe length 83.1% (78.3–88.2%) of length of upper lobe of caudal fin. Depth of caudal peduncle 86.9% (76.7–95.1%) in body depth. Ventral and dorsal adipose keels supported by rudimentary rays; dorsal keel well developed, extending forward nearly to dorsal-fin base, ventral keel extending nearly to vertical at end of anal-fin base. In dissected specimens (KIZ 2008008165–66, 71; 131.4, 129.7 and 109.8 mm SL), intestine forming a small zigzag loop anteriorly but not reaching posterior surface of U-shaped stomach. Gas bladder osseous, anterior chamber invisible, fully enclosed in capsule; posterior chamber rudimentary. <b>Color in preserved specimens (fixed in 10% formalin, preserved in 75% alcohol).</b> (Fig. 1) Head dark brown, snout and lips grayish, nostril light, cheeks maculated. Body dark brown with 22–26 vertical bars; each bar at least twice as wide as light interspaces; anterior bars thinner; bars anterior to caudal peduncle split vertically into two or three bars. Abdomen yellow. Dorsal fin with three dark brown rows, one at base, second close to distal margin (producing a prominent light margin), and third located medially. Pectoral and pelvic fins white, dark on dorsal side. Anal fin white, dark at base. Caudal fin and adipose keels dark gray. Caudal-fin base with a blurry dark, basal bar. <b>Color in life.</b> Color pattern overall similar to that in alcohol, although a little darker. Caudal and dorsal fins and adipose keel with bright red tint. <b>Etymology.</b> From Latin, refering to the Wuliang Mountain. <b>Habitat.</b> <i>Homatula wuliangensis</i> occurs in streams of mountain valleys in areas with swift current over rocky and stony substrates, interspersed with sand and gravel in higher elevation reaches (1781 m asl) and in areas with slower current in the lower reaches (1274 m asl) (Fig. 2a, b). <b>Distribution.</b> Known from the Baimushan River of the Lancang River basin in Wuliang Mountains, Yunnan, China (Fig. 3).
description: Published as part of <i>Min, Rui, Yang, Jun-Xing &amp; Chen, Xiao-Yong, 2012, Homatula wuliangensis (Teleostei: Nemacheilidae), a new loach from Yunnan, China, pp. 313-318 in Zootaxa 3586</i> on pages 315-316
description: {"references": ["Kottelat, M. (1990) Indochinese nemacheilines. A revision of nemacheiline loaches (Pisces: Cypriniformes) of Thailand, Burma, Laos, Cambodia and southern Viet Nam. Verlag Dr. Friedrich Pfeil, Munchen, Germany, 1 - 262 pp."]}