Carasobarbus exulatus (Banister & Clarke 1977)

Diagnosis: The mouth of this species has a more ventral position than that of the other Carasobarbus species, being almost inferior (Ref. 57642). It is the only species of the genus Carasobarbus in which both pairs of barbels are always present, the barbels of the anterior pair being often very short, but not quite rudimentary (Ref. 57642). Carasobarbus exulatus differs from all congeners, except C. fritschii and C. harterti in modally having 9 instead of 10 branched dorsal-fin rays; it differs from C. fritschii and C. harterti in modally having 12 scales around the least circumference of the caudal peduncle vs. 16 and in having 24-32 scales on the lateral line vs. 30-39 and 31-38 respectively (Ref. 94477).Description: The body is slightly compressed and gives the impression of being heavy and bulky; the dorsal profile is arched and the ventral profile flat; a nuchal hump is present in adult specimens, but absent in juveniles; the body depth is about the same as the head length (Ref. 94477, 113720). The snout is pointed in lateral view; the mouth is curved and ventral; the lower lip is thin and continuous; two pairs of barbels are invariably present, although the anterior pair may well be very small; the eyes are at the end of the anterior half of the head and slightly protuberant (Ref. 113720). The caudal peduncle is slender (Ref. 94477). The dorsal fin has 4 unbranched rays and 7-10 branched rays; the last unbranched ray is strongly ossified and only the tip is flexible, its length is about the same as the head length; the dorsal fin origin is usually slightly in front of the vertical from the pelvic fin origin; the anal fin has 3 unbranched rays and 5-6 branched rays; when reflexed, the anal fin reaches to the base of the caudal fin rays (Ref. 94477, 113720). In the lateral line series there are 24-32 scales; there are 10-12 scales around the least circumference of the caudal peduncle and 4-5.5 scales from the lateral to the dorsal mid-line; between the lateral line and the ventral mid-line there are 3.5-5.5 scales; there are 2-3 scales between the lateral line and the pelvic fin base; the scales on the ventral surface of the fish, especially in the thoracic region, show signs of reduction and in some specimens the region between the pectoral fins is naked (Ref. 94477, 113720). The pharyngeal teeth number 2.3.5-5.3.2 (Ref. 113720). The gill rakers are short, hooked and widely spaced; there are 6-9 gill rakers on the lower limb of the first gill arch (Ref. 113720).Colouration: Preserved specimens are yellow-brown; have a dark back and a lighter belly, the fins are whitish or greyish (Ref. 94477, 113720). In live specimens and freshly preserved specimens the back and the sides are grey to golden, the belly is yellowish white and the fins are sometimes golden to orange (Ref. 94477).

Dorsal spines (total): 0; Dorsal soft rays (total): 11 - 14; Analspines: 0; Analsoft rays: 8 - 9; Vertebrae: 37 - 39

fisheries:

Carasobarbus exulatus és una espècie de peix de la família dels ciprínids i de l'ordre dels cipriniformes.

The Hadramaut himri (Carasobarbus exulatus) is a species of ray-finned fish in the genus Carasobarbus, it is endemic to Yemen where it occurs in Wadi Hadramaut, and possibly Wadi Maran.

Carasobarbus exulatus es una especie de peces de la familia de los Cyprinidae en el orden de los Cypriniformes.

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Carasobarbus exulatus Carasobarbus generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Cyprinidae familian.

逐魮（学名：Carasobarbus exulatus）为輻鰭魚綱鯉形目鲤科的其中一種，分布於亞洲葉門哈德拉毛河流域，體長可達17.8公分。

The body is not particularly high backed and the maximum body depth is at the origin of the dorsal fin or slightly in front of it (Fig. 13). A nuchal hump is present in adult specimens (Fig. 14) but absent in juveniles (Fig. 15). The caudal peduncle is slender. The head profile is convex ventrally and straight dorsally. The body depth is about the same as the head length (Fig. 12). In specimens below 100 mm SL, the head is rather narrow, in larger specimens it becomes wider. The mouth is subterminal and comparatively narrow. Two pairs of barbels are present (Table 2), the posterior one is rather long. The eyes are at the end of the anterior half of the head and slightly protuberant. The morphometric characters are summarised in Table 1. The dorsal fin is long and usually has four unbranched and eight to 10 branched rays (Table 3). The last unbranched ray is strongly ossified and only the tip is flexible. Its length is about the same as the head length (Fig. 4). The anal fin is long, usually has three unbranched and five or six branched rays (Table 4). There are 26 to 32 scales in the lateral line (Table 5), 4 to 5.5 scales above the lateral line (Table 6), 3.5 to five scales below the lateral line (Table 7) and 10 to 12 scales around the least circumference of the caudal peduncle (Table 8). The scales are shown in Fig. 5. The pharyngeal teeth count is 2.3.5-5.3.2 in one specimen, 2.3.5- in 16 specimens, -5.3.2 in one specimen and 2.3.4- in one specimen. The pharyngeal teeth are hooked at their tips (Fig. 6). In live specimens and freshly preserved specimens the back and the sides are grey to golden, the belly is yellowish white and the fins are sometimes golden to orange (Fig. 15). Preserved specimens have a dark back and a lighter belly, the fins are whitish or greyish. Juveniles have a dark spot on the sides of the caudal peduncle. The maximum length observed in the material available is 288 mm SL. Carasobarbus exulatus differs from all congeners, except Carasobarbus fritschii and Carasobarbus harterti in modally having nine instead of 10 branched dorsal-fin rays. It differs from Carasobarbus fritschii and Carasobarbus harterti in modally having 12 scales around the least circumference of the caudal peduncle vs. 16 and in having 26 to 32 scales the lateral line vs. 30 to 39 and 31 to 38 respectively.

This species is endemic to Yemen and occurs in Wādī Ḩaḑramawt / Wādī al Masīlah and its pleistocene tributaries (Banister and Clarke 1977, Krupp 1983a, Fig. 7). It is also known from Sadd Ma’rib (Al-Safadi 1995), a dam lake at 15°23'46"N, 45°14'37"E and Wādī Ḩajr (14°02'42"N, 48°40'27"E), where they are “found throughout the whole year and are distributed all over the stream” (Attaala and Rubaia 2005). Locality data for BMNH 1976.4.7:332-333 is given as “Wadi Maran, E. Yemen” (Banister and Clarke 1977), which is most likely Wādī Marrān [13°53'51"N, 46°05'14"E], representing the westernmost record of this species that is backed by specimens.