Paracanthocobitis phuketensis ( Klausewitz, 1957 )

Page, Lawrence M., 2017, A revision of the Paracanthocobitis zonalternans (Cypriniformes: Nemacheilidae) species complex with descriptions of three new species, Zootaxa 4324 (1), pp. 85-107: 94-96

publication ID

https://doi.org/10.11646/zootaxa.4324.1.5

publication LSID

lsid:zoobank.org:pub:101B3Cb2-7D7E-4232-A4E4-Fca46D90Fdbe

persistent identifier

http://treatment.plazi.org/id/03858783-FFE7-8E21-58BF-FB459576FE4F

treatment provided by

Plazi

scientific name

Paracanthocobitis phuketensis ( Klausewitz, 1957 )
status

 

Paracanthocobitis phuketensis ( Klausewitz, 1957) 

Phuket Zipper Loach

Figs. 6View FIGURE 6 & 7View FIGURE 7

Noemacheilus phuketensis Klausewitz, 1957:195  , fig. 1. Type locality: Phuket Island, Thailand. Holotype: SMF 3966.

Acanthocobitis phuketensis  .— Bănărescu & Nalbant, 1964:160.

Noemacheilus (Acanthocobitis) phuketensis  .— Bănărescu & Nalbant, 1968:322.

Diagnosis. Paracanthocobitis phuketensis  is distinguished from all other species of Paracanthocobitis  by combination of incomplete lateral line ending near dorsal-fin insertion; 9½–10½ branched dorsal-fin rays; axillary pelvic lobe usually absent, occasionally rudimentary; series of black blotches, sometimes overlain with faint dusky stripe along side of body not obscuring lateral blotches, ending near caudal-fin; circular black spot on upper margin of caudal-fin base; black pigment not extending from black blotches along side of body onto pectoral-fin base; no marmorated pattern anterior to dorsal-fin origin; dorsal saddles longer than interspaces, frequently connecting to lateral blotches; 7–8 branched upper caudal-fin rays.

Description. Meristic and morphometric data are in Tables 4 and 5. Body deepest just anterior to dorsal-fin origin; slightly compressed before dorsal fin, strongly compressed postdorsally. Head depressed, snout gently rounded to slightly pointed when viewed dorsally or laterally. Dorsal-fin origin far in front of pelvic-fin origin; distal margin convex. Pectoral fin 0.18–0.28 SL, not reaching pelvic fin; pelvic fin 0.16–0.22 SL, not reaching anal fin; caudal fin emarginate. Lateral line incomplete, reaching just beyond dorsal-fin insertion; 20–48 pores. Axillary pelvic lobe usually absent, occasionally rudimentary. Mouth arched with heavily papillated lips; upper lip with 3–5 rows of papillae, continuous with large pads on lower lip. Three pairs of barbels; inner rostral barbel extends to or slightly past base of maxillary barbel, maxillary barbel and outer rostral barbel extend to or slightly past eye. Body covered with scales; 9½ (5 specimens)–10½ (50 specimens) branched dorsal-fin rays; 9–10, usually 9, pectoral-fin rays; 6 pelvic-fin rays; 5½ branched anal-fin rays; 7–8 branched upper caudal-fin rays; 8 branched lower caudal-fin rays. Suborbital flap in male. Maximum SL 33.3 mm female.

Body yellowish-brown with 10–12 dark brown to black blotches along lateral line sometimes overlain with faint dusky stripe usually ending near caudal fin; 12–15 small dark brown dorsal saddles; dorsal saddles longer than interspaces, frequently connecting to lateral blotches. Dark spots and blotches on head; uninterrupted black bar from eye to tip of snout. Ocellus with black center near upper margin of caudal peduncle; 3–6 concentric rows of dark spots in dorsal fin, 2–3 rows of dark spots in anal fin, 4–6 dark bands on caudal fin. Dusky lateral stripe not extending onto pectoral-fin origin.

Comparisons. Paracanthocobitis phuketensis  differs from all other species of Paracanthocobitis  except P. zonalternans  , P. nigrolineata  , P. triangula  , and P. marmorata  in having an incomplete lateral line ending near the dorsal-fin insertion (vs. lateral line to the end of the caudal peduncle) and 9½–10½ (vs.>10½) branched dorsal-fin rays. Paracanthocobitis phuketensis  differs from P. zonalternans  in not having black pigment extending from a black lateral stripe onto the pectoral-fin base; axillary pelvic lobe usually absent, occasionally rudimentary (vs. always present); and in having dorsal saddles longer than interspaces that frequently connect to lateral blotches vs. short (not extending ventrally to dorsal stripe) dorsal saddles that rarely connect to lateral blotches. Paracanthocobitis phuketensis  differs from P. nigrolineata  in not having a distinct black stripe along the side of the body obscuring the lateral blotches and black pigment extending from the lateral stripe onto the pectoral-fin base; and axillary pelvic lobe usually absent, occasionally rudimentary (vs. always present). Paracanthocobitis phuketensis  differs from P. triangula  in having a circular (vs. triangular  ) black spot on the upper margin of the caudal-fin base, and axillary pelvic lobe usually absent, occasionally rudimentary (vs. always present). Paracanthocobitis phuketensis  differs from P. marmorata  in having a dusky lateral stripe along the side of the body (vs. no stripe); axillary pelvic lobe usually absent, occasionally rudimentary (vs. always absent); a circular (vs. tear-drop shaped) black spot on the upper margin of the caudal-fin base; and in not having a marmorated pattern between the dorsal saddles and lateral blotches. Paracanthocobitis phuketensis  from Phuket Island and Phang-Nga river drainages further differs from P. nigrolineata  , P. triangula  , and P. marmorata  in sometimes having 7 (vs. always 8) upper branched caudal-fin rays.

Distribution. Paracanthocobitis phuketensis  is known from Peninsular Thailand in the Panang Tak drainage and on Phuket Island, south to the Perlis, Padang Sarai, and Ketil drainages of Peninsular Malaysia ( Fig. 5View FIGURE 5).

Material Examined. Malaysia: Malay Peninsula: MCZAbout MCZ 47226View Materials, 1View Materials, 26.9View Materials mm, Satun Malay Peninsula, Boripatra River , on road from Satun to Hat Tai., 6.815N, 99.974EGoogleMaps  ; ZRCAbout ZRC 41103View Materials, 1View Materials, 17.1View Materials mm, Perlis Sintok-Pdg., Senai Road, 6.456N, 100.491EGoogleMaps  ; ZRC 46671View Materials, 3, 22.9–27.8 mm, Kedah Kg. Tandop about 6–7 mi from Baling on road to Weng, 5.665N, 100.901EGoogleMaps  . Thailand: Phang-Nga drainage: UF 182833View Materials, 4, 23.6–27.3 mm, near Phang Nga, off rte. 4090, 8.571N, 98.418EGoogleMaps  ; Tapi ( Tapee ) drainage: UF 183331View Materials, 2, 31.3–33.3 mm, Nakhon Si Thammarat Province, near rte. 4015, 8.349N, 99.692EGoogleMaps  ; NIFIAbout NIFI 0 2181, 2, 27.0– 27.1 mm, Surat Thani Province, Suratthani Tapi (Tapee) drainage, Khlong Sok at Ban Kheng Sok, 8.907N, 98.522EGoogleMaps  ; Kraburi drainage: UF 236043View Materials, 16 (10 ex.), 23.3–31.3 mm, Ranong, Kraburi River at Khlong Bangsikim, trib. of Laoun River , km 3/537 near Ban Kreo Noi , 10.1505N, 98.717EGoogleMaps  ; ZRC 42198View Materials, 3, 24.7–30.9 mm, Ranong Province, Khlong Phrae, Sai Ban Kraeo Noi ( Bang Kaeo ), km 8 on road branching E, 32 km of Ranong on rte to Kra Buri, 10.184N, 98.720EGoogleMaps  ; Songkhla drainage: ZRCAbout ZRC 41974View Materials, 5View Materials (1 adult, 4 juveniles), 36.4 mm, Ranong King, Amphae Suk Sam Lan (Ran), Ton Koi Waterfall, 9.353N, 98.430EGoogleMaps  ; ZRCAbout ZRC 42184View Materials, 8View Materials (5 adult, 3 juveniles), 18.5–23.1 mm, Ranong stream, N of Khura Buri, 100 km S of Ranong , 9.199N, 98.413EGoogleMaps  ; Panang Tak drainage: UF 236051View Materials, 4, 27.9–32 mm, Chumphon Province, Tha Sae Co., Panang Tak River at Khlong Rap Ro , 10.627N, 99.057EGoogleMaps  . Phuket Island: FMNH 124765, 2, 25.5–28.4 mm, Klong Vang In Nevi, (trib., Kra River ), rte. 4, 18 km from Kra Buri (52 km SW of Chumphon), 10.272N, 98.758EGoogleMaps  ; FMNH 124766, 1, 29.0 mm, Klong Chuitt, rte. 4090, 18 km NW of Pling, 8.588N, 98.398E; ROM 48972View Materials, 2, 27.7–31.3 mm, Ranong Province, N of Bang Kaeo, off highway 4 close to border of Burma, 10.250N, 98.750EGoogleMaps  ; SMF 3966View Materials, 29.4View Materials mm, holotype of Noemacheilus phuketensis  , Phuket Island, off west coast of south peninsula Thailand, 7.992N, 98.343EGoogleMaps  ; SMF 3967View Materials, 22.2View Materials mm, paratype of Noemacheilus phuketensis  , same locality as SMF 3966View MaterialsGoogleMaps  ; SMF 4244View Materials, 37.5View Materials mm, paratype of Noemacheilus phuketensis  , same locality as SMF 3966View MaterialsGoogleMaps  ; UMMZ 238962, 2, 22–24.4 mm, Phuket, Nam Tok Ton Sai, 8.026N, 98.363EGoogleMaps  ; ZRC 45717View Materials, 8, 21–26.7 mm, Phuket, 7.957N, 98.317EGoogleMaps  . Gulf of Thailand: ZRCAbout ZRC 42016View Materials, 1View Materials, 23.6View Materials mm, Prachaup Khiri Khan Province , Thaup Sakae District, W of Ang Thong, 11.449N, 99.483EGoogleMaps  .

MCZ

Museum of Comparative Zoology

ZRC

Zoological Reference Collection, National University of Singapore

NIFI

National Inland Fisheries Institute

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Cypriniformes

Family

Nemacheilidae

Genus

Paracanthocobitis

Loc

Paracanthocobitis phuketensis ( Klausewitz, 1957 )

Page, Lawrence M. 2017

2017
Loc

Noemacheilus (Acanthocobitis) phuketensis

Banarescu 1968: 322

1968
Loc

Acanthocobitis phuketensis

Banarescu 1964: 160

1964
Loc

Noemacheilus phuketensis

Klausewitz 1957: 195