Lanceola falsa Vinogradov
Creators: name: Zeidler, Wolfgang
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Plantae
Chlorophyta
Chlorophyceae
Sphaeropleales
Characiaceae
Lanceola
Lanceola falsa

description: <i>Lanceola falsa</i> Vinogradov (Fig. 17) <i>Lanceola falsa</i> Vinogradov, 1970: 391–393, fig 5. Vinogradov <i>et al</i>. 1982: 60–61, fig. 10. <b>Type material.</b> This species was described from two sexually mature females, with body length of 22 and 24 mm, caught in the Kurile-Kamchatka region of the North-west Pacific; <i>Vityaz</i> Stn. 5606 [46º10’N 153º13’E; 0–4000 m] and <i>Vityaz</i> Stn. 5612 [45º23’– 45º34’N 153º04’– 153º48’E; 0–5850 m]. The female of length 22 mm is described and figured by Vinogradov (1970) and is in the ZMMU (Mb–1044), on microscope slides. <b>Diagnosis.</b> According to Vinogradov (1970). Only known from the two female specimens as detailed above. Habitus like <i>L. sayana</i>. Head with small, indistinct, hooked rostrum. Eyes small, reniform, without crystalline cones. Antennae 1 relatively short; terminal article slightly longer than preceding two combined. Antennae 2 length about 1.5x A1. Pereopod 3 similar to P4; basis length about twice merus; carpus slightly longer than merus; propodus slightly longer than carpus; dactylus short, length about 0.2x propodus. Pereopods 5–7 with stout articles with longitudinal ridges; the dactyls are stout and non-retractile and the propodus is without spoon-shaped formation. Pereopod 5 similar in length to P4; basis length about 1.8x merus; carpus slightly longer than merus; propodus length 1.2x carpus; dactylus short, stout, slightly curved. Pereopod 6; length 1.2x P5; basis length 1.5x merus; carpus length 1.4x merus; propodus length 1.2x carpus; dactylus as for P5. Pereopod 7; length 0.6x P6; basis length slightly more than twice merus; carpus length 1.7x merus; propodus length 1.3x carpus; dactylus as for P5. Uropoda with relatively broad rami, especially U3. Telson rounded; length 0.7x peduncle of U3. Colour of living specimens not recorded. <b>Remarks.</b> I have not seen any specimens of this species but accept its validity based on the observations of Vinogradov (1970). This species is distinguished from all of its congeners by the non-retractile dactyls of pereopods 5–7, and in this character is atypical of the genus <i>Lanceola</i>. However, its removal from <i>Lanceola</i> is not warranted at this stage because it superficially resembles other species of <i>Lanceola</i>, such as <i>L. sayana</i> and <i>L. pacifica</i>. The loss or reduction of retractile and hooded dactyls is also seen in pereopod 5 of <i>L. sphaerica</i>, <i>L. chelifera</i> and <i>L. gruneri</i> <b>sp. nov.</b>, but in these species retractile and hooded dactyls are maintained for pereopods 6 &amp; 7. <b>Distribution.</b> Only known from the Kurile-Kamchatka region of the Pacific Ocean, from two specimens as detailed above.
description: Published as part of <i>Zeidler, Wolfgang, 2009, A review of the hyperiidean amphipod superfamily Lanceoloidea Bowman &amp; Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea), pp. 1-117 in Zootaxa 2000</i> on pages 52-53
description: {"references": ["Vinogradov, M. E. (1970) New data on the amphipods Hyperiidea Physosomata of the northwest part of the Pacific. Trudy Instituta Okeanologii Akademiya Nauk SSSR 86: 382 - 400. [In Russian]. English translation: In: Bogorov, V. G. (Ed.) Fauna of the Kurile-Kamchatka Trench and its Environment, pp. 398 - 418. Israel Program for Scientific Translations, Jerusalem, 1972.", "Vinogradov, M. E., Volkov, A. F. &amp; Semenova, T. N. (1982) Amfipody-Giperiidy (Amphipoda: Hyperiidea) Mirovogo Okeanea. Akademiya Nauk SSSR, Opredeliteli po Faune SSSR No. 132. Leningrad, 492 pp. [In Russian]. English translation, 1996, Smithsonian Institution Libraries, Washington D. C., D. Siegel-Causey, Scientific Editor."]}