Afrolaophonte pori Masry, 1970
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publication ID |
https://doi.org/ 10.3906/zoo-1708-4 |
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persistent identifier |
https://treatment.plazi.org/id/03BD797B-FFB1-FFA9-015F-FDECD820B8F3 |
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treatment provided by |
Felipe |
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scientific name |
Afrolaophonte pori Masry, 1970 |
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Afrolaophonte pori Masry, 1970 View in CoL ( Figures 2–10 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 10 )
3.1. Material examined
Mst08; 13.09.2008 (2♀♀), Mst17; 26.07.2007 (6♀♀, 1♂), Mst23; 10.04.2007 (2♀♀), 27.07.2007 (4♀♀, 3♂♂) , 27.11.2007 (6♀♀), Mst25; 27.11.2007 (6♀♀), Mst26; 14.09.2008 (8♀♀, 29♂♂), 27.07.2007 (7♀♀, 4♂♂) , Mst28; 27.11.2007 (16♀♀, 15♂♂), Mst31; 11.07.04.2007 (5♀♀), 28.07.2007 (2♀♀), 28.11.2007 (5♀♀, 4♂♂), Mst33; 11.04.2007 (1♀), Mst34; 28.07.2007 (8♀♀), Mst35; 28.07.2007 (2♀♀, 5♂♂), 28.11.2007 (10♀♀, 10♂♂) , Mst36; 28.11.2007 (1♀), Mst38; 15.09.2008 (30♀♀, 15♂♂), 28.07.2007 (12♀♀) , 28.11.2007 (1♀), Mst40; 28.11.2007 (1♀), Mst41; 11.04.2007 (4♀♀), Mst44; 12.04.2007 (3♀♀), 29.07.2007 (8♀♀, 6♂♂) , Mst45; 29.07.2007 (4♀♀), Mst46; 29.07.2007 (1♀), 29.11.2007 (1♀) , Mst48; 12.04.2007 (1♀), 15.09.2008 (1♂) , 29.07.2007 (7♀♀), 29.11.2007 (4♀♀, 6♂♂), Mst50; 12.04.2007 (2♀♀), 29.07.2007 (2♀♀, 4♂♂) , Mst51; 12.04.2007 (2♀♀), Mst52; 12.04.2007 (6♀♀, 2♂♂), 29.07.2007 (11♀♀) , Mst57; 30.07.2007 (5♀♀), 30.11.2007 (10♀♀, 4♂♂) , Mst60; 01.12.2007 (1♂♂), Mst65; 31.07.2007 (2♀♀, 3♂♂),Mst67; 01.12.2007 (1♂), Mst69; 14.04.2007 (4♀♀); MstY03; 25.07.2007 (1♀), MstY07; 24.07.2007 (12♀♀), 25.11.2007 (2♀♀, 1♂) , MstY11; 27.07.2007 (8♀♀, 4♂♂); MstY14; 01.12.2007 (1♀, 2♂♂); 31.07.2007 (2♀♀) , Datst6; 15.04.2007 (3♀♀, 3♂♂), 21.08.2007 (1♀, 1♂) , Datst7; 16.04.2007 (3♀♀, 3♂♂), 20.08.2007 (2♀♀, 2♂♂) , Datst8; 04.12.2007 (5♀♀, 6♂♂), 26.02.2008 (10♀♀, 5♂♂) , Datst15; 16.04.2007 (5♀♀, 2♂♂), 21.08.2007 (4♀♀, 1♂) , 04.12.2007 (4♀♀, 1♂), 25.02.2008 (2♂♂), Ast03; 20.10.2012 (1♀, 2♂♂), Ast07; 17.05.2012 (1♀), 20.10.2012 (10♀♀, 5♂♂) , Ast11; 07.06.2013 (8♀♀, 11♂♂), Ast12; 21.10.2012 (2♀♀, 2♂♂), 28.06.2014 (1♀) , Ast19; 10.06.2013 (6♀♀), 19.05.2012 (2♀♀) , Ast22; 09.06.2013 (11♀♀, 5♂♂), Ast25; 10.06.2013 (8♀♀, 9♂♂), 22.10.2012 (39♀♀, 46♂♂) , Ast26; 22.10.2012 (3♂♂), Ast27; 09.06.2013 (6♀♀, 2♂♂), Ast28; 10.06.2013 (8♀♀), Ast29; 20.05.2012 (1♂), Ast36; 20.05.2012 (1♂), Ast38; 11.06.2013 (16♀♀, 8♂♂), 20.05.2012 (5♀♀, 3♂♂) , 23.10.2012 (58♀♀, 55♂♂), Ast39; 20.05.2012 (14♀♀, 26♂♂), Ast45; 21.05.2012 (25♀♀, 12♂♂), 23.10.2012 (4♀♀, 8♂♂) , Ast56; 25.10.2012 (11♀♀, 3♂♂), Ast57; 14.06.2013 (11♀♀, 4♂♂), Ast58; 14.06.2013 (15♀♀, 2♂♂), Ast59; 02.07.2014 (7♀♀, 6♂♂), 14.06.2013 (3♀♀, 2♂♂) , 25.10.2012 (11♀♀, 3♂♂), Ast60; 14.06.2013 (9♀♀, 3♂♂), 22.05.2012 (50♀♀, 30♂♂) , 25.10.2012 (9♀♀, 9♂♂), Ast61; 25.10.2012 (1♂), Ast63; 03.07.2014 (17♀♀, 16♂♂), 14.06.2013 (6♀♀, 5♂♂) , 23.05.2012 (22♀♀, 11♂♂), 25.10.2012 (34♀♀, 25♂♂), Ast64; 14.06.2013 (10♀♀, 3♂♂), Ast66; 02.07.2014 (1♀), Ast68; 02.07.2014 (1♀), 25.10.2012 (37♀♀, 6♂♂) , Ast76; 04.07.2014 (2♀♀), 16.06.2013 (12♀♀) , Ast77; 16.06.2013 (9♀♀, 6♂♂), Ast80; 24.05.2012 (9♀♀, 6♂♂), Ast81; 16.06.2013 (3♀♀, 5♂♂), Ast82; 16.06.2013 (7♀♀, 2♂♂), Ast83; 24.05.2012 (1♀, 1♂), Ast87; 28.10.2012 (5♀♀, 9♂♂), Ast88; 28.10.2012 (1♀), Ast90; 25.05.2012 (2♀♀), Ast93; 25.05.2012 (29♀♀, 16♂♂), Ast94; 25.05.2012 (22♀♀, 16♂♂), AstY01; 08.06.2013 (6♀♀, 4♂♂), 20.10.2012 (35♀♀, 48♂♂) , AstY06; 20.05.2012 (14♀♀, 3♂♂), AstY08; 13.06.2013 (1♀), AstY09; 24.10.2012 (2♀♀, 6♂♂), AstY12; 26.10.2012 (2♀♀, 1♂), AstY16; 27.10.2012 (3♀♀, 14♂♂), SRZst4; 29.09.2013 (18♀♀, 9♂♂), 23.02.2014 (4♀♀, 8♂♂) , SRZst6; 23.02.2014 (3♀♀), SRZst8; 23.02.2014 (1♀), SRZst20; 27.09.2013 (6♀♀, 3♂♂), SRZst21; 27.09.2013 (1♀), 21.02.2014 (1♀, 2♂) , SRZst22; 27.09.2013 (2♂♂).
3.1. Description
Female. Body length from tip of rostrum to posterior margin of caudal rami 447 µm; body cylindrical, without clear demarcation between urosome and prosome ( Figures 2A, 2B View Figure 2 , 3A View Figure 3 ). Integuments of the somites are covered with tiny hairs on the dorsal and ventral surfaces (not shown in Figure 2 View Figure 2 ), lateral margins of abdominal segments and the surface of caudal rami with long setules as shown in
Figures 2A and 2B View Figure 2 . Posterior margin of body somites with hyaline frills. Rostrum defined at base, about as long as first antennular segment, bears 2 sensilla at tip and tiny setules at dorsal surface ( Figure 2A View Figure 2 ). Genital double somite about 1.2 times longer than wide, original segmentation clear in dorsal and lateral views; genital opening located midventrally at anterior half of the genital double somite. Anal somite bears a convex anal operculum dorsally ( Figures 2A and 2B View Figure 2 ).
Caudal rami ( Figures 2A, 2B View Figure 2 , 3C View Figure 3 , 9A–9C) about 2 times longer than wide, dorsal and ventral surfaces furnished with long setules as figured, bears a well-defined tube pore at outer distal corner and 7 setae. Setae I–III located at the proximal half of the dorsolateral surface, naked, seta I very small, setae II and III about 3 times longer than seta I; setae IV and V located terminally, with a fractured plane near base, seta IV about 2.2 times longer than caudal rami, plumose at the posterior half; seta V about 2.3 times longer than seta IV, naked; seta VI located at inner distal corner, naked; seta VII located at the middorsal surface, naked and biarticulated at base.
Figure 6. A. pori , swimming legs: A) ♀ P1; B) ♀ P2; C, D) ♀ P3 variants; E) ♀ P4; F) ♀ P5; G) ♂ P3; H) ♂ P4.
Figure 7. SEM photographs of A. pori , ♀: A) P2; B) P3; C) P4; E) P5.
Figure 8. SEM photographs of A. pori , ♀: A) P3; B) P4 (asymmetric).
Antennule ( Figures 3D View Figure 3 , 4A View Figure 4 ) slender, 6-segmented, segment surfaces furnished with patchy hairs as shown, all setae naked; segment II with a triangular cuticular projection near outer margin of dorsal surface; segment IV with a long aesthetasc fused basally to a seta, originates from a distinct pedestal at ventral surface; segment 6 with apical acrothek consisting of a short aesthetasc fused basally to 2 setae. Setal formula: 1-[1], 2-[7], 3-[6], 4-[1+ae], 5-[1], 6-[8+acrothek].
Antenna ( Figures 3E View Figure 3 , 4B View Figure 4 ) with coxa, allobasis, unisegmented exopod and endopod. Coxa squarish and naked; allobasis elongated, about 2.4 times longer than wide, bears a short row of spinules near outer distal corner; endopod elongated, about 3.8 times longer than wide, furnished with a transverse row of spinules apically, bears 2 subapical bipinnate setae at lateral margin, 2 bipinnate, 2 naked, and 2 bipinnate geniculate setae apically; exopod with 4 bipinnate setae.
Mandible ( Figures 4D, 4E View Figure 4 ) with well-developed gnathobase, bearing several teeth and 1 unipinnate seta. Palp reduced, uniramous, and armed with 2 naked setae.
Maxillule ( Figures 4C, 4D View Figure 4 , 5A View Figure 5 ): praecoxa well developed, naked; arthrite well developed, distal margin with subequal spines and a unipinnate spine fused at base; coxal endite with long, strong unipinnate spine; basal endite ( Figure 4F View Figure 4 ) with 5 naked setae.
Figure 9. A. pori : A) ♀ urosome, ventral; B, C) ♀ caudal rami, B) dorsal, C) lateral; D, E) ♂ antennule; F) ♂ P5; G) ♂ P6.
Maxilla ( Figures 4F View Figure 4 , 5A View Figure 5 ): syncoxa with row of long spinules along outer margin, transverse rows of short spinules on posterior surface; bears 2 endites, first endite bears 2 setae with fringed tip, which are fused to each other and to endite at base; second endite with 3 relatively long and strong setae with fringed tips. Allobasis prolonged to a strong, slightly curved claw carrying 2 long and 2 short naked setae.
Maxilliped ( Figures 4G View Figure 4 , 5B View Figure 5 ): syncoxa slightly longer than wide, ornamented with 2 rows of spinules proximally, bears a short plumose seta apically. Basis elongate, about 2.8 times longer than wide, largest at middle part, furnished with a row of spinules at inner margin, bears a few spinules at outer margin. Endopod modified to a long naked claw, about as long as basis.
P1 ( Figures 5C, 5D View Figure 5 , 6A): intercoxal sclerite enlarged, rectangular, about 2.6 times wider than long; coxa slightly longer than wide, furnished with a row of long spinules at outer margin; basis slightly longer than wide, bears a spinular row and a naked seta at outer margin and a short naked seta near inner distal corner. Endopod 2-segmented, segment 1 elongated, about 6 times longer than wide, furnished with a short row of spinules at proximal part of inner margin; segment 2 relatively short, bears rows of spinules at inner and outer margins, armed with a long, strong unipinnate claw. Exopod unisegmented, relatively short, reaches one-fifth of first exopod segment, furnished with a transverse row of spinule at outer margin, bears 2 naked setae at outer distal corner, 1 short naked seta and 1 long bipinnate geniculate seta at terminal.
P2 (Figures 6B, 7A) highly reduced; intercoxal sclerite, coxa, and basis fused, with a long and naked outer basal seta, bears a pore at anterior surface, furnished with transverse row of spinules at outer margin; uniramous with unisegmented exopod, which bears 2 bipinnate strong setae.
P3 (Figures 6C, 6D, 7D, 8A) intercoxal sclerite rectangular, about 2.3 times wider than long; coxa wider than long, furnished with tiny hairs on anterior surface, basis with a long and naked outer basal seta, which is set on a long pedestal. Endopod variative, unisegmented (Figures 6C, 7D) or 2-segmented (Figures 6D, 8A). In unisegmented condition furnished with spinules at inner and outer margins, bears a pore near distal margin on anterior surface, armed with 1 strong bipinnate spine and 1 relatively long plumose seta terminally; in 2-segmented condition first segment squarish and naked, armature and ornamentation of second segment as in unisegmented. Exopod variative, 2-segmented (Figures 6C, 7D) or 3-segmented (Figures 6D, 8A). In 2-segmented condition segment 1 short and squarish, armed with spinular rows on anterior surface, inner margin naked, bears a long plumose seta at outer distal corner; segment 2 about 2.6 times longer than wide, inner and outer margins furnished with row of spinules, armed with 4 identical strong bipinnate spines (2 at terminal, 2 at outer margin), bears a pore near distal margin at anterior surface. In 3-segmented condition segments 1–3 inner margins naked; segment 1 a strong bipinnate seta, segment 2 with a short bipinnate spine at outer distal corner; segment 3 with 3 identical short bipinnate spines.
P4 (Figures 6E, 7C) coxa ornamented with 2 rows of short spinules near outer distal corner on anterior surface and furnished with tiny spinules at outer margin. Basis with a naked outer basal seta, bears a tube pore on anterior surface near the junction of exopod. Endopod unisegmented, fused to the basis basally, bears long spinules at inner margin, armed with 2 long plumose setae terminally. Exopod 3-segmented; furnished with a transverse row of spinules at proximal part of the outer margin, bears a long plumose seta at outer distal corner, inner margin naked; segment 2 slightly longer than wide, furnished with row of spinules at inner and outer margins, bears a long plumose seta at outer distal corner; segment 3 about 3.5 times longer than wide, furnished with long spinules at inner and outer margins, bears 2 long plumose setae terminally and a relatively short plumose seta at outer distal corner.
P5 (Figures 6F, 7D) baseoendopod furnished with long setules at outer margin and with relatively short setules at inner margin, bears a pore on anterior surface, outer basal setae long and naked, exopodal lobe with 2 plumose setae and 2 short strong setae with fringed tip. Endopod about 2 times longer than its maximum width, outer margin naked, inner margin furnished with long setules, armed with 4 plumose setae.
P6 (Figure 8A) baseoendopod and exopod fused to a small plate, bears 1 short naked seta.
Male. Sexual dimorphism in antennule and P3–P6. Body length from tip of rostrum to posterior margin of caudal rami 331 µm; as in female, except genital double somite ( Figures 2C View Figure 2 , 10A View Figure 10 ).
Antennule (Figures 9D, 9E, 10B) 8-segmented subchirocer, all setae naked except the plumose seta at segments 4 and 2 unipinnate setae at segment 5. Segments 1 and 2 with a triangular cuticular projection on dorsal surface, segments 3 and 4 partially fused on dorsal surface, segment 5 swollen, bears a long aesthetasc fused basally to a naked seta; geniculation between segments 5 and 6, segment 8 bears an acrothek consisting of a short aesthetasc fused basally to 2 setae. Setal formula: 1-[1], 2-[8], 3-[3], 4-[4+1 plumose], 5-[7+2 spinulose+ae], 6-[1], 7-[0], 8-[9+ae].
P3 (Figures 6G, 10C) basis partially fused to coxa at outer proximal, outer basal seta long and naked. Endopod 3-segmented, segment 1 completely fused to basis, naked; segment 2 short and naked; segment 3 drawn into 1 long and 1 short, strong, chitinized projection at tip; bears a naked seta originating from a short pedestal located behind the short projection at tip. Exopod 3-segmented, segments 1 and 2 with a short bipinnate seta at outer distal corner; segment 3 with 3 short bipinnate setae.
P4 (Figures 6H, 10D) coxa as in female, basis with a long and naked outer basal seta; endopod reduced to a plumose seta; exopod 3-segmented, segment 1 armed with a very strong bidentate spine at outer margin, inner margin naked; segment 2 armed with a bipinnate spine at outer distal corner, inner margin naked; segment 3 with 3 bipinnate spines.
P5 (Figure 9F) baseoendopod reduced and fused to the posterior margin of the somite, with a long and naked outer basal seta, exopod squarish, armed with 3 strong bipinnate setae.
P6 (Figure 9G) baseoendopod and exopod fused to a squarish plate, bears 2 bipinnate setae.
3.2. Variation
Variation on the segmentation of the female P3 exopod and endopod was observed among the different populations (see Section 4 for detailed explanation). One female that was collected from Ast58 had an asymmetric P4 exopod; at one side, the second and third segments of the exopod were fused (Figure 8B).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.