Paraschistura kermanensis, Sayyadzadeh & Teimori & Esmaeili, 2019

Sayyadzadeh, Golnaz, Teimori, Azad & Esmaeili, Hamid Reza, 2019, Paraschistura kermanensis, a new stone loach species from southeastern Iran (Teleostei: Nemacheilidae), Zootaxa 4638 (4), pp. 571-583 : 574-582

publication ID

https://doi.org/10.11646/zootaxa.4638.4.7

publication LSID

lsid:zoobank.org:pub:BBE2C6F7-A694-4869-80C2-61D5177476CB

persistent identifier

https://treatment.plazi.org/id/03E987E1-7E27-FFC7-B4A0-6439FC0077CA

treatment provided by

Plazi

scientific name

Paraschistura kermanensis
status

new species

Paraschistura kermanensis   , new species

( Figs. 3–8 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 )

Holotype. ZM-CBSU H2442, 65 mm SL; Iran: Kerman prov.: Bidkhoon River at Hanjam village , 29°39’51.2’’N 56°30’52.3’’E; G. Sayyadzadeh & T. Asrar, 26 Feb. 2019. GoogleMaps  

Paratypes. ZM-CBSU H2443, 20, 43–54 mm SL; same as holotype.

Additional materials. ZM-SBUK11-46, 36, 36–68 mm SL; Iran: Kerman prov.: Bidkhoon River at Deh Bala village, 29°37’35.8’’N 56°30’32.63’’E; A. Teimori, M. Mehrparvar and M. Motamedi, 15 Aug. 2018.

Material used in the molecular genetic analysis. ZM-CBSU M2502, M2504, M2505; Kerman prov.: Bidkhoon River at Deh Bala village , 29°37’35.8’’N 56°30’32.63’’E (GenBank accession numbers: MN 061674 View Materials , GoogleMaps   MN 061675 View Materials ,   MN 061676 View Materials   ).— ZM-CBSU M2556, M2557, M2558; Iran: Kerman prov.: Bidkhoon River at Hanjam village , 29°39’51.2’’N 56°30’52.3’’E (GenBank accession numbers: MN 061677, MN 061678, MN 061679 ) GoogleMaps   .

Diagnosis. Paraschistura kermanensis   is distinguished from P. bampurensis   , P. hormuzensis   , P. ilamensis   , P. nielseni   , and P. susiani   by lacking a suborbital flap or groove in males. It is distinguished from P. aredvii   , P. delvarii   , P. naumanni   , P. kessleri   and P. turcmenica   by lacking scales on the flank anterior to the dorsal-fin origin and having scales on the caudal peduncle (vs. body fully covered by scales in P. aredvii   , P. delvarii   , P. naumanni   ; and scales completely absent in P. kessleri   and P. turcmenica   ). It is further distinguished from P. abdolii   , P. alta   , P. cristata   and P. turcmenica   by having the pelvic-fin origin situated anterior to or below the vertical through the dorsal-fin origin (vs. posterior to the dorsal-fin origin). The new species is further distinguished from P. kessleri   by having irregular or almost regularly-shaped dark-bars on the flank, faded in some individuals(vs. distinct, wide and regularly-shaped dark-bars on the flank, see Freyhof et al. 2015 fig. 9), and from P. lindbergi   , from the westernmost regions of Afghanistan and Pakistan, by having scales on the caudal peduncle (vs. scales completely absent, see Freyhof et al. (2015). Among congeners studied for molecular characters, Paraschistura kermanensis   is characterised by six fixed diagnostic nucleotide substitutions in the mtDNA COI barcode region studied and a K2P nearest neighbor distance of 4 % to P. abdolii   ( Table 2 View TABLE 2 ).

Description. For general appearance and morphometric data see Figures 3–8 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 and Table 3 View TABLE 3 . Small sized and moderately elongate species with short head. Body deepest at or slightly anterior to dorsal-fin origin, depth moderately decreasing towards caudal-fin base. No hump at nape. Greatest body width at pectoral-fin base. Section of head roundish, flattened on ventral surface. Caudal peduncle compressed laterally, 1.1–1.4 (mean 1.2) times longer than deep. Pectoral fin reaching approximately 50–67 % of distance from pectoral-fin origin to pelvic-fin origin. Pelvic axillarylobe ovoid, fully attached to body or absent. Pelvic-fin origin anterior toor below vertical through dorsal-fin origin. Pelvic fin not reaching to anus. Anal-fin origin about 1.5 times eye diameter behind anus. Anal-fin origin anterior to vertical through halfway between dorsal- and caudal-fin origins. No adipose keels on caudal peduncle. Margin of dorsal fin straight or slightly convex. Caudal fin slightly to deeply emarginate. Largest known specimen 68 mm SL.

Dorsal fin with 3–4 unbranched and 6 – 7½ branched rays. Anal fin with 2–3 unbranched and 5½ branched rays. Caudal fin with 8+7 (5), 8+8 (7) or 9+8 (3) branched rays. Pectoral fin with 10–11 and pelvic fin with 7–8 branched rays. Back and flank anterior to dorsal-fin origin without scales. Few or many small scales, often isolated and deeply embedded on caudal peduncle. Lateral line incomplete, reaching to vertical through dorsal-fin origin or below dorsal-fin base, posterior to dorsal-fin in few individuals. Anterior nostril opening at the end of a low, pointed and flap-like tube. Nostrils separated by a narrow space, anterior nostril not overlapping posterior nostril when folded backwards. No suborbital flap or groove. Mouth small, strongly arched ( Fig. 7 View FIGURE 7 ). Lips moderately thick, with many deep furrows. A deep median interruption in lower lip. Upper lip with median incision. Barbels short, inner rostral barbel reaching to a point at 2/3 of distance between inner rostral barbel and base of maxillary barbel; outer one reaching to base of maxillary barbel. Maxillary barbel reaching vertical through anterior part or middle of eye.

Coloration: Body pale-brown or yellowish. Upper part of head, opercula and snout covered by dark-brown small blotches, cheeks pale with few dark-brown dots on top. Flank with 4–21 regularly- or irregularly-shaped dark brown bars. Bars absent in some individuals, often blurred or dissociated into a marmorate pattern. Bars often dissociate on back but usually meeting their homologues on caudal peduncle. A bold black spot at base of unbranched and first branched dorsal-fin rays. An irregularly-shaped bold black bar at caudal-fin base. Dorsal and caudal fins with dark brown elongated blotches on rays, forming 2–3 vertical rows in dorsal fin and 2–4 vertical rows in caudal fin. Anal-fin with dark brown elongated blotches on rays forming 1–3 vertical rows. Pectoral fin with elongated dark-brown blotches on rays; pelvic fin hyaline or with few dark-brown blotches on rays in some individuals, hyaline in others.

Distribution: Paraschistura kermanensis   is known from the Bidkhoon River, in the endorheic Kerman-Naein basin ( Figs. 2 View FIGURE 2 , 9 View FIGURE 9 , Table 4 View TABLE 4 ).

Etymology. The species is named for the Kerman province where the type material was collected.

Remarks. Freyhof et al. (2015) identified all Paraschistura   populations from Kerman province as P. abdolii   . Paraschistura abdolii   is known from three drainage basins in southern Iran: The Kol drainage, which flows to the Persian Gulf, the endorheic Sirjan basin where it is known from the Baft River drainage, and the western tributaries of the endorheic Hamun-e Jaz Murian basin. Paraschistura kermanensis   was found in the adjacent Kerman-Naein basin ( Fig. 2 View FIGURE 2 ). The two species are very similar to each other superficially, but P. kermanensis   is distinguished from P. abdolii   by having a larger pre-dorsal distance (53.5–56.0 vs. 49.2–53.0), having the pelvic-fin origin situated anterior to or below the vertical through the dorsal-fin origin (vs. posterior to the dorsal-fin origin), a K2P near- est neighbour distance of 4%, and six fixed diagnostic nucleotide substitutions in the mtDNA COI barcode region studied.

Comparative material. All from Iran.

Paraschistura abdolii   : ZMCBSU J3030, 2, 52–55 mm SL; Kerman prov.: Kogar River at Baft, 29°15’26”N 56°24’57”E.— ZM-CBSU J3904, 32, 32–51 mm SL; Kerman prov.: Pol River at road between Rayen and Jiroft, 29°21’06”N 57°29’09”E GoogleMaps   .— ZM-CBSU 2011-1516, 5, 42–50 mm SL; Yazd prov.: Nahr e Masih (Masih spring), south east of Herat, 30°01’ 56”N 54°19’54”E GoogleMaps   .— ZM-CBSU 384, 3, 36–38 mm SL; Fars prov.: Qatroyeh qanat at Qatroyeh village ,, 29°10’12”N 54°41’03”E GoogleMaps   .

Paraschistura aredvii   : ZM-CBSU J2959, 28, 21–44 mm SL; Fars prov.: Sarab-e Bahram spring at Sarab-e Bahram , 30°02’48”N 51°33’34”E GoogleMaps   .

Paraschistura alta   : ZM-CBSU H2239, 15, 51–81 mm SL; Sistan & Baluchistan prov.: Zabol, a pool at Zahak, 30°51’54”N, 61°33’06”E.

Paraschistura bampurensis   : ZM-CBSU 2012–1528, 1, 31 mm SL; Sistan & Baluchestan prov.: Sarbaz River at Chahbahar, 26°08’33”N 61°26’24”E.—ZM-CBSU 383, 1, 59 mm SL; ZM-CBSU N160, 8, 22–48 mm SL; ZM-CBSU N1010, 50, 20–53 mm SL; Sistan & Baluchestan prov.: Irandegan River at Irandegan, 27°53’22”N 61°05’35”E.—ZM-CBSU N1137, 3, 43–50 mm SL; Sistan & Baluchestan prov.: Sarbaz River at Sarbaz, 26°08’33”N 61°26’24”E.—ZMCBSU N1257, 1, 43 mm SL; Sistan & Baluchestan prov.: Sarbaz River at Sarbaz, 26°33’36”N 61°13’12”E.—ZM-CBSU N430, 1, 42 mm SL; Sistan & Baluchestan prov.: Kormadkor River at Sara- van, 27°19’41”N 62°21’26”E.

Paraschistura cristata   : ZM-CBSU J2921, 8, 35–59 mm SL; Khorasan Razavi prov.: Qanat at Bakharz village, about 30 km south-west of Torbat-e Jam, 35°02’03”N 60°18’19”E.— ZM-CBSU J2930, 5, 21–29 mm SL; Khorasan Razavi prov.: Qanat at Jahan Abad , about 20 km north of Torbat-e Jam , 35°24’46”N 60°34’08”E GoogleMaps   .

Paraschistura delvarii   : ZM-CBSU J3304, 9, 36.9–50.7 mm SL; Fars prov.: Qareh Aqaj River, near Tangab dam at Firuzabad, 28°57’48.11’’N 52°33’15.54’’E.— ZM-CBSU H2038, 1, 38.2 mm SL; Fars prov.: Qareh Aqaj River at Khanzenian , 29°41′13.0″N, 52°02′58.6″E GoogleMaps   .

Paraschistura hormuzensis   : ZM-CBSU J3168, 78, 19–41 mm SL; Hormuzgan prov.: Rudan River at Abnama bridge, 27°28’24”N 57°15’14”E GoogleMaps   .

Paraschistura ilamensis   : ZM-CBSU J3247, 29, 30–41 mm SL; Khozestan prov.: Bala River (Balarud) at Dezful, 32°20’14”N 48°17’14”E.

Paraschistura naumanni   : ZM-CBSU J2941, 11, 30–48 mm SL; Fars prov.: Golabi spring, about 35 km west of Darab , 28°47’15”N 54°22’19”E GoogleMaps   .

Paraschistura nielseni   : ZM-CBSU H2073, 15, 34–54 mm SL; Fars prov.: Qareh Aqaj River, at Kavar , 29°10’55.10”N 52°41’32.80”E GoogleMaps   .

Paraschistura susiani   : ZM-CBSU J3009, 15, 30–38 mm SL; Khozestan prov.: Zard River close to Rudzard village at road from Ramhormoz to Baghmalek, 31°22’34”N 49°43’11”E.

Paraschistura turcmenica   : ZM-CBSU 1521, 4, 36–40 mm SL; ZM-CBSU J3277, 6, 27–37 mm SL; Khorasan Razavi prov.: Khiyaban qanat at Khiyaban village, 34°44’10”N 60°34’29”E.— ZM-CBSU J2935, 5, 19–30 mm SL; Khorasan Razavi prov.: Qanat at Jahan Abad , 35°24’46”N 60°34’08”E GoogleMaps   .

T

Tavera, Department of Geology and Geophysics

MN

Museu Nacional, Universidade Federal do Rio de Janeiro