Kalliapseudes magnus Lang, 1956

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 74-80

publication ID	https://doi.org/ 10.11646/zootaxa.3142.1.1
persistent identifier	https://treatment.plazi.org/id/AF5F87C3-DE22-FFA7-B19E-C66DFAB395D3
treatment provided by	Felipe
scientific name	Kalliapseudes magnus Lang, 1956
status

Treatment

Kalliapseudes magnus Lang, 1956 View in CoL

( Figs 48–51 View FIGURE 48 View FIGURE 49 View FIGURE 50 View FIGURE 51 )

Kalliapseudes (Kalliapseudopsis) magnus Lang, 1956: 210–217 View in CoL , Figs. B, C.

Kalliapseudes (Kalliapseudes) magnus View in CoL . Bamber et al., 2003: 52.

Kalliapseudes magnus Lang, 1956: 209 View in CoL . Guţu, 2006: 127, 133. Drumm, 2007: 18.

Type material. Neotype (present study).

Material examined. Neotype: female with oostegites ( MFN 26289), Northwest Africa, 25°12'N, 15°32'W, 78m; 23°00'N, 16°42'W, 46m, leg: A.v. Humboldt, 1971, det: H.E. Gruner, 1974. Non –type material: 3 adult females with oostegites (1 dissected), 3 adult males (1 dissected), same locality as neotype. 1 adult female ( ZMH GoogleMaps

K–41974); 1 juvenile ( ZMH K–41975): Northwest Africa, 24°56.2'N, 15°34.6'W, 53 m GoogleMaps .

article lacking ventral spiniform setae; accessory flagellum of three articles; main flagellum of female with three– five aesthetascs, male with clusters of aesthetascs on proximal articles and decreasing in number distally. Antenna first peduncle article with two simple setae (one long and one short) on outer distal corner; third peduncle article with one plumose seta on inner margin. Labrum complex lacking cusps. Terminal spiniform seta of mandibular palp approximately 2.3 times as long as broad. Female cheliped fixed finger and dactylus cutting edge with spinules not interspersed with round tubercles. Male cheliped fixed finger cutting edge with large triangular tooth. Cheliped and pereopod 1 exopodite with three plumose setae. Pereopods 2 and 3 propodus with very stout pectinate spiniform seta subdistally on the inner surface; dactylus with digitiform lobe bearing more than five aesthetascs. Pereopod 5 propodus lacking short bipinnate setae on both inner and outer surfaces. Pereopod 6 propodus with cluster of subterminal long simple setae on outer surface. Male with pereopod 6 dactylus shorter than carpus and propodus combined, with at least one subterminal seta. Female pereopod 6 dactylus with several subterminal setae. Uropod basal article approximately 2.5 times as long as broad; exopodite with three articles, last article approximately 2.3 times as long as second article.

Description. Adult female with oostegites. Body ( Fig. 48A View FIGURE 48 ): length approximately 10 mm, 5.5 times as long as broad.

Carapace ( Fig. 48A View FIGURE 48 ). Slightly broader than long, one pair mid–lateral and dorsal setae; rostrum rounded.

Pereonites ( Fig. 48A View FIGURE 48 ). Pereonites 4 and 5 longer than others and pereonites 1 and 6 shortest; at least one pair anterolateral and one pair posterolateral setae; hyposphaenia present on all pereonites.

Pleon ( Fig. 48A View FIGURE 48 ). Pleonites subequal; rounded epimera, with several plumose setae, one pair dorsolateral simple setae; hyposphaenia present on all pleonites. Pleotelson approximately same length as last two pleonites combined, tapering posteriorly to indented tip, with several short dorsal, lateral and posterior simple setae.

Antennule ( Fig. 48B View FIGURE 48 ). First peduncle article approximately 2.4 times as long as second and third articles combined and approximately 2.7 times as long as maximum width, with some simple setae on inner margin and several simple and broom setae on outer margin. Second peduncle article approximately 2.7 times shorter than first article, with several simple and broom setae. Third and fourth articles subequal (including common article). Outer flagellum shorter than first peduncle article, with nine articles, one aesthetasc on articles 3, 5, 6 and 8. Inner flagellum with three articles, last article with four terminal setae (three simple and one broom).

Antenna ( Fig. 48C View FIGURE 48 ). First peduncle article with medial extension bearing four plumose setae and two simple setae (one long and one short) on outer subdistal corner. Second peduncle article naked and squama with six simple setae. Third peduncle article with one plumose seta on inner margin. Peduncle article 4 (last) shorter than flagellum, with double row plumose setae, one proximal and distal broom seta. Flagellum with seven articles, articles 3 and 4 with several bipectinate setae.

Labrum ( Fig. 48D View FIGURE 48 ) concave and with numerous posterior hair–like setae.

Mandibles ( Figs. 48E–G View FIGURE 48 ). Left mandible ( Fig. 48E View FIGURE 48 ): incisor process with approximately seven and lacinia mobilis with approximately nine teeth; spine row with four spiniform setae. Right mandible incisor process ( Fig. 48F View FIGURE 48 ) with two large teeth and three smaller teeth. Palp with short terminal spiniform seta, approximately 2.3 times as long as broad.

Labium ( Fig. 48H View FIGURE 48 ). Palp with long hair–like setae on margins.

Maxillule ( Fig. 48I View FIGURE 48 ). Inner endite bearing four terminally setulate setae and dense rows of hair–like setae on outer and inner margins. Outer endite with 11 long and one short spiniform setae, two subterminal setae and dense rows of hair–like setae on outer margin.

Maxilla ( Fig. 49A View FIGURE 49 ). Inner lobe of fixed endite with posterior row of two serrate setae and with long anterior row of setae. Outer lobe of fixed endite with four distal serrate and several simple and pectinate setae, and one short serrate spiniform seta on posterior face. Inner lobe of moveable endite with several simple and pectinate setae. Outer lobe of moveable endite with three pectinate and two plumodenticulate (bearing proximal setules and distal denticles). Inner margin spinulate.

Maxilliped ( Figs. 49B, C View FIGURE 49 ). Basal article fringed with plumose setae on outer margin, inner margin naked. First article of palp with several subdistal simple setae. Last three articles of palp with double row of long plumose setae on inner margin; second article with one simple seta on outer distal corner. Endite with nine pappose setae along margin and one long simple and several pappose distal

C, E = 0.2 mm; D, H, I = 0.1 mm.

Cheliped ( Figs. 49D, E View FIGURE 49 ). Basis with four simple setae and one short spiniform seta on ventral margin. Merus much longer than broad, with five distal simple setae. Carpus approximately 3.7 times as long as broad, with double row of long, plumose setae and several simple setae near dorsal margin. Propodus with diagonal row of long, plumose setae on inner face; fixed finger with several simple setae proximal to distal unguis; cutting edge with numerous (> 10) spinules; palm with several distal simple setae. Dactylus with three simple setae on inner surface; cutting edge with several pectinate spinules increasing in length distally (> 10). Exopodite with three plumose setae (two long and one short).

Pereopod 1 ( Fig. 49F View FIGURE 49 ). Basis approximately 2.3 times as long as broad, with one spiniform and several simple setae ventrally. Ischium with two simple setae. Merus shorter than and as broad as basis, with several simple setae on ventral margin, and one spiniform seta on each distal corner. Carpus approximately 2.5 times shorter than merus, with several simple setae and two ventrodistal and one dorsodistal spiniform setae. Propodus shorter than carpus, with several simple setae and five ventral and two dorsal serrate spiniform setae, one broom seta on dorsal margin. Dactylus represented by sensory organ, shorter than propodus, with several long, terminal sensory setae with two setae on inner surface; unguis absent. Exopodite with three plumose setae (two long and one short).

Pereopod 2 ( Figs. 49G–I View FIGURE 49 ). Basis approximately 3.3 times as long as broad, with two broom setae on dorsal margin and several simple setae on ventral margin. Ischium with four ventrodistal simple setae (two long and two short). Merus approximately same length as carpus, with three simple setae and one spiniform seta ventrodistally. Carpus approximately 1.4 times as long as broad, with several simple setae distally, and seven spiniform setae (four ventral, two on subdistal outer surface, and one on dorsodistal corner). Propodus approximately 3.3 times shorter than basis, with several distal simple setae, one dorsal broom seta, five ventral and one dorsodistal spiniform setae, three spiniform setae on outer surface, and one stout pectinate spiniform seta ( Fig. 49I View FIGURE 49 ) on inner surface. Dactylus

Pereopod 3 ( Fig. 50A, B View FIGURE 50 ). Similar to pereopod 2. Carpus with nine spiniform setae. Dactylus digitiform lobe with nine sensory setae.

Pereopod 4 ( Figs. 50C–F View FIGURE 50 ). Basis approximately 2.5 times as long as broad, with two proximal broom setae, one simple dorsodistal seta and one short simple ventrodistal seta. Ischium with four ventrodistal simple setae. Merus shorter than carpus, with several simple and two spiniform setae. Carpus with seven spiniform setae on inner surface and six spiniform setae on outer surface. Propodus with seven serrate spiniform setae on outer surface, five serrate spiniform setae on inner surface, one dorsodistal serrate spiniform seta, five short distal bipinnate setae, and one proximal broom seta on dorsal margin. Dactylus shorter than propodus, with tuft of six sensory setae and two simple setae midway; unguis absent.

Pereopod 5 ( Fig. 50G View FIGURE 50 ). Similar to pereopod 4. Dactylus with tuft of seven sensory setae.

Pereopod 6 ( Fig. 50H View FIGURE 50 ). Basis slender, approximately 4.2 times as long as broad, with seven plumose setae on dorsal margin, six plumose and six simple setae on ventral margin and one proximal broom seta on outer surface (broken off). Ischium with five simple setae on ventral margin. Merus longer than ischium, with three plumose setae on dorsal margin and seven simple setae on ventral margin. Carpus approximately twice as long as merus, with 10 simple setae on ventral margin, one plumose and four simple setae on dorsal margin, and three simple setae subdistally on outer surface. Propodus shorter than the carpus, with six long spiniform setae on ventral margin and 33 short bipinnate setae. Dactylus longer than propodus, with three subterminal setae; unguis absent.

Pleopods ( Fig. 50I View FIGURE 50 ). Basal article with four long plumose setae. Exopodite with 24 plumose setae and endopodite with 23 plumose setae.

Uropods ( Fig. 50J View FIGURE 50 ). Basal article approximately 2.5 times as long as broad, with several subdistal simple setae and one simple seta on outer margin. Exopodite with three articles, last article approximately 2.3 times as long as second article, with four terminal simple setae. Endopodite (exact number of articles difficult to determine due to incomplete fusion in some articles).

Adult male. Very similar to female but with the following differences:

Rostrum ( Fig. 51A View FIGURE 51 ) more pronounced (knob–like).

Antennule ( Fig. 51B View FIGURE 51 ). Proximal articles of main flagellum with cluster of aesthetascs, decreasing in number distally.

Cheliped ( Fig. 51C View FIGURE 51 ). More robust. Cutting edge of fixed finger with large, triangular tooth.

Pereopod 6 (not illustrated). Propodus with seven long spiniform setae and approximately 43 short bippinate setae. Dactylus almost as long as carpus and propodus combined, with two subterminal setae.

Type Locality. Dakar, between Gorée and Cape Manuel, NW Africa, Eastern Atlantic , 7.5–9.5 m depth (Fig. 1, number 17) .

Geographic distribution. Dakar, NW Africa, Eastern Atlantic, 7.5–78 m depth.

Intraspecific variation. A few other adult females that were examined had an antenna with six flagellum articles, and the pectinate setae were on articles 2 and 3; they also had a squama with eight simple setae and the medial extension of the first article with five plumose setae. Some females had four subterminal setae on the dactylus of pereopod 6.

Remarks. A full supplemental description of this species is included here to expand on Lang’s (1956a) description and the first description of the female is presented. Type material was lodged at the Zoological Museum, University of Copenhagen, Denmark, but it is apparently lost (Jurgen Oleson, personal communication). A neotype for K. magnus was selected (MFN 26289) from material near the type locality.

Kalliapseudes senegalensis Guţu, 2006 also occurs off Dakar, albeit at shallower depths (1 m). Apparently Guţu only had juvenile females because his description and illustrations are based on a juvenile paratype. This makes it difficult to compare this species to K. magnus , especially when considering the number of setae, spines, articles, etc. However, we do believe the two species can be differentiated by the following characteristics: 1) the setation on the posterior margin of the pleotelson (more setose in K. senegalensis ), and 2) the number of plumose setae on the exopodites of the first pereopod and cheliped (4 in K. senegalensis and 3 in K. magnus ). It is hard to imagine the adult of K. senegalensis being less setose than the juvenile. Two other Kalliapseudes species are found off western Africa: K. mauritanicus Monod, 1923 , off Mauritania, and K. profundus n. sp. found at a depth of 429 m. This species can be differentiated from these two species by the following combination of characteristics: 1) the pereopods 4 and 5 have short distal bipinnate setae. Kalliapseudes magnus represents one of the largest known species of Kalliapseudes (along with K. mauritanicus and K. obtusifrons ). It can reach a length of 10 mm.