Author: Parr, 1951

Normichthys operosus Parr, 1951

Diagnosis: body fairly deep and compressed, head about one-third of body length. Snout pointed, premaxillary tusks short, pointing forward; eye large, about equal to snout; upper jaw not reaching beyond hind rim of eye. Gillrakers 27-31 (7-9 on upper limb). Branchiostegal rays 8. Pyloric caeca 5-6, simple or branched. Two to four large and several smaller open pits behind upper part of shoulder girdle, usually at least one pit twice as wide as body scales. Dorsal fin far back on body, with 18-20 finrays; pectoral fins small, with 16-19 finrays, pelvic fins behind midpoint of body and near to anal origin, with 6-7 finrays, anal fin origin only a little behind that of dorsal fin, with 16-18 finrays. Light organs rudimentary or absent. Lateral line without modified enlarged scales, about 80-90 scales in lateral series above it, 14-16 scales above lateral line and 13-14 below at level of dorsal and anal fin origins. Colour: uniform dark. Size: to 16 cm, usually 9-13 cm.

Habitat: mesopelagic to bathypelagic, at about 1,000 m. Food: no data. Reproduction: no data.

Distribution: from about the Azores northward to Iceland, the northern and western boundaries apparently following the 1,000 m isotherm for 4 °C and the southern boundary that for 5 °C. Elsewhere, occurring in the upwelling areas off Senegal and Angola.

Eggs, larvae and young stages. Quero, 1970: 273, 275.
Otoliths (sagitta). No data.

Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Superclass Gnathostomata
Class Osteichthyes
Order Clupeiformes
Family Leptochilichthyidae
Genus Normichthys
Species Normichthys operosus

Status in World Register of Marine Species

Accepted name: Normichthys operosus Parr, 1951

Scientific synonyms and common names

Normichthys operosus Parr, 1951

Synonyms:

Normichthys operosa Parr, 1951, Am. Mus. Novit., (1531): 17, 19 (18°22'N., 18°14' W.). Holotype: ZMUC no. P 1763.
Bathytroctes (Talismania) homopterus (non Vaillant, 1888): Norman, 1930: 269-270, fig. 2.
Normichthys operosa: Parr, 1960: 92-93 Krefft, 1966: 176 Quero, 1970: 272-273, 275, fig. 12.
Normichthys operosa operosa Parr, 1960, Dana Rep., (51): 93-94, fig. 64, 65D-F, 66 (right). Type locality and holotype equal those of the species.
Normichthys operosa islandica Parr, 1960, Dana Rep., (51): 94, fig. 65a-c, 66 (left) (West of Vikural, Iceland, approx. 66°N., 26°-27°W.).Holotype:ZMUCno.P1765.
Normichthys operosa operosa: Quero, 1969: 2 Geistdoerfer et al., 1971b: 1178.


Common names:

multipore searsid [En]

Geistdoerfer, P.; Hureau, J. C.; Rannou, M. 1971b. Liste préliminaire des espèces de Poissons de profondeur récoltées au cours de la campagne 'Noratlante' du N.O. Jean Charcot en Atlantique Nord (aout-octobre 1969). Bull. Mus. Hist. nat., Paris, 42 (6): 1177-1185.

Krefft, G. 1966. German observations on Rare Fish in 1964. Annls biol., Copenh., 1964 [1966] 21: pp. 175-178.

Norman, J. R. 1930. Oceanic fishes and flatfishes collected in 1925-1927. 'Discovery' Rep., 2: pp. 261-370, 47 fig., 2 pl.

Parr, A. E. 1951. Preliminary revision of the Alepocephalidae, with the introduction of a new family, Searsidae. Am. Mus. Novit., (1531): pp. 1-21.

Parr, A. E. 1960. The fishes of the family Searsidae. Dana Rep., (51): pp. 1-109, fig. 1-73.

Quéro, J.-C. 1969. Liste des poissons capturés au cours des pêches pélagiques profondes de la 'Thalassa' dans l'Atlantique nord-est. Cons. perm. int. Explor. Mer, Circular L25 :1-5.

Quéro, J.-C. 1970a. Les poissons de la famille des Searsidés capturés dans l'Atlantique nordest. Campagnes du 'Président-Théodore-Tissier' et de la 'Thalassa'. Revue Trav. Inst. (scient. tech.) Pêch. marit., 34 (3): 261-276, fig. 1-13.

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