Loligo diomedeae Hoyle 1904: 29, pl. 5, fig. 13, pl. 6, figs. 1−7; Castellanos & Cazzaniga 1980: 24, fig. 1
Loliolopsis chiroctes Berry 1929: 267, pl. 32, figs. 1−2, pl. 33, figs. 1−6.
Loliolopsis diomedeae, Voss 1971: 7; Nesis 1982: 131, fig. 34; Toll 1982: 41, pl. 3c; Roper et al. 1984: 119, 4 figs; Alamo & Valdivieso 1987: 169; Nesis 1987: 143, fig. 34 K−N; Cardoso et al. 1989: 90, fig. 1; Okutani 1995: 63, fig. 79 a−c; Roper et al. 1995: 325, 4 figs; Filippova et al. 1997: 102, fig. 60.
Lolliguncula diomedeae, Brakoniecki 1986: 48, 92, 120, fig. 3A; Cardoso 1991: 7, fig. 2b.
Lolliguncula (Loliolopsis) diomedeae, Vecchione et al. 1998: 218; Paredes et al. 1999: 34; Okutani 2005: 122; Vecchione et al. 2005: 25; Jereb et al. 2010: 86, figs. 119−120.
Type material examined. Holotype-1 female 85 mm ML; Mexico, off Acapulco, 16°4730N, 99°5930W, 141 fm [253 m], green mud; coll. R/V Albatross, station 3422, 12 April 1891; USNM 574847.
Other material examined. 1 male 42 mm ML + 7 females 56−76 mm ML; Humboldt Bay, Colombia, 07°00N, 77°45W, 40 fm [72 m]; coll. Cacique commercial vessel, 02 March 1970; USNM 730085. 1 female 44 mm ML; Colombia, 06°35.5N, 77°33W, surface; 15−16 June 1972; UMML 1501. 1 male 59 mm ML; Colombia, 04°48N, 81°17W, 16 m; coll. R/V Anton Bruun, cruise 16, station 624−B, 02 June 1966; USNM. 2 females 53−57 mm ML; Colombia, 04°06N, 81°09W, 90 m; coll. R/V Anton Bruun, cruise 18B, station 764, 08 September 1966; USNM. 6 males 46−53 mm ML + 6 females 55−75 mm ML; Colombia, 03°43N,77°35W, 80 m; coll. R/V Anton Bruun, cruise 18B, station 782, 16 September 1966; USNM. 1 female 80 mm ML; Colombia, 03°39N, 77°21W, 18.2 m; coll. L. Knapp, R/V Inderena, cruise 7009, station 336, 22 October 1970; USNM. 23 males 36−53 mm ML + 60 females 33−81 mm ML; Colombia, 03°35N,78°35W, 70−80 m; coll. R/V Anton Bruun, cruise 18B, station 783, 16 September 1966; USNM. 1 male 49 mm ML + 59 females 54−82 mm ML; Ecuador, 00°58N,80°08W, 100 m; coll. R/V Anton Bruun, cruise 18B, station 779, 13 September 1966; USNM. 1 female 67 mm ML; Ecuador, 35 mi NW Pasado; coll. W. L. Klawe, night light dip net, 03 April 1962; UMML 2104. 1 female 71 mm ML; Ecuador, 00°57S, 80°57W, 120−150 m; coll. R/V Anton Bruun, cruise 18B, station 776, 12 September 1966; USNM. 1 female 77 mm ML; Peru, Paita; coll. E. del Solar, R/V SNP−1, station 43, 22 January 1969; USNM 288458. 4 females 74−96 mm ML; Peru, 03°52.5S, 80°55W; coll. E. del Solar, R/V SNP−1, cruise 6901, 22 January 1969; IMARPE. 1 male 51 mm ML + 4 females 57−63 mm ML; Peru, 03°24S, 80°38W, 50 m; coll. R/V SNP−1, cruise 6905, station 5, 08 May 1969; IMARPE. 1 male 66 mm ML; Peru, off Reventazon, 105 m; coll. fishing vessel Audaz, 30 May 1969; IMARPE. 1 female 92 mm ML; Peru, Tumbes, northwest Bocapán; coll. fishing vessel Ilo, station 8, 08 April 1970; IMARPE. 15 fe-males 74−96 mm ML; Peru, 03°33S, 80°44.5W, 72 m; coll. R/V SNP−1, cruise 7008−09, 31 August 1970; IMARPE. 1 female 72 mm ML; Peru, 03°33S, 80°54W, 130 m; coll. R/V SNP−1, cruise 7008−09, 31 August 1970; IMARPE. 4 females 82−101 mm ML; Peru, 16°25.1S, 73°33.4W, 130 m; coll. R/V SNP−1, cruise 7201, 26 January 1972; IMARPE. 2 males 65−73 mm ML + 13 females 69−104 mm ML; Peru, 05°39.8S, 81°05W, 65 m; coll. R/V SNP−1, cruise 7205, 13 May 1972; IMARPE. 2 males 64−76 mm ML + 1 female 91 mm ML; Peru, 07°03S, 80°32.5W, 65 m; coll. R/V SNP−1, cruise 7205, 15 May 1972; IMARPE. 1 female 113 mm ML; Peru, 05°21S, 81°10W, 62 m; coll. R/V Professor Mesyatsev, cruise 7210, 09 October 1972; IMARPE. 1 male 67 mm ML + 3 females 86−114 mm ML; Peru, 07°20S, 80°19W, 100 m; coll. R/V TAREQ II, cruise 7605, 18 May 1976; IMARPE. 2 males 62 mm ML + 4 females 63−68 mm ML; Peru, 04°04.15S, 81°08.13W, 115 m; coll. R/V TAREQ II, cruise 7605, 30 May 1976; IMARPE. 1 male 56.2 mm ML + 1 female 77 mm ML; Peru, 03°28.8S, 82°42.9W, 55 m; coll. R/V Professor Siedlecki, cruise 7911−12, 05 December 1979; IMARPE. 1 female 94 mm ML; Peru, 05°41.6S, 81°09.3W, 78 m; coll. BIC Humboldt, cruise 8007, 30 July 1980; IMARPE. 3 females 84−90 mm ML; Peru, Tumbes, off Caleta La Cruz, 11 m; 15 November 1982; IMARPE. 2 females 97−98 mm ML; Peru, 10°53.6S, 77°45.8W, 35 m; coll. BIC Humboldt, cruise 8301, 13 January 1983; IMARPE. 1 male 69 mm ML; Peru, 09°14.9S, 78°35.9W, 64 m; coll. BIC Humboldt, cruise 8301, 15 January 1983; IMARPE. 1 male 61 mm ML; Peru, 06°54.7S, 80°38.6W, 73 m; coll. BIC Humboldt, cruise 8301, 21 January 1983; IMARPE. 4 females 87−99.7 mm ML; Peru, 06°20.6S, 80°52.9W, 62 m; coll. BIC Humboldt, cruise 8301, 21 January 1983; IMARPE. 1 female 92 mm ML; Peru, 05°03.6S, 81°15.8W, 115 m; coll. BIC Humboldt, cruise 8301, 22 February 1983; IMARPE. 1 female 100 mm ML; Peru, Tumbes, off Caleta La Cruz, 11 mm; 24 June 1987; IMARPE. 1 male 77 mm ML + 1 female 82 mm ML; Panama, 08°00N, 79°31.1W, 99−95 m; coll. R/V Pillsbury, station 518, 04 May 1967; UMML 1836.
Diagnostic features. Morphometric characters are given in Tabla 3. Mantle elongate, narrow, with slightly pointed posterior end. Fins short with rounded heart−shaped profile, length 30−40% of ML. Females with larger body, relatively shorter arms and fins larger than males. Tentacles short, sucker rings with about 24 square teeth. Buccal membrane with 4−10 suckers. Arm sucker rings with 10−11 square teeth, prominent distally. Both ventral arms conspicuously modified in males. Left ventral arm hectocotylized in males, very long