Trichorhina tropidocerata, Souza & Araújo & Campos-Filho, 2011
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publication ID |
https://doi.org/ 10.1590/S0073-47212011000200012 |
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DOI |
https://doi.org/10.5281/zenodo.4386568 |
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persistent identifier |
https://treatment.plazi.org/id/03C987F0-7E62-E45C-FEAE-D989FB8EFBE7 |
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treatment provided by |
Carolina |
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scientific name |
Trichorhina tropidocerata |
| status |
sp. nov. |
Trichorhina tropidocerata View in CoL sp. nov.
( Figs 7 View Figs 1–7 , 108–124 View Figs View Figs )
Type material. Holotype ♂, BRAZIL, São Paulo: Santos ( Ponta da Praia ), under bricks and stones 100 m from fishing station, 27.XI.1963, P. S. Moreira col. ( MNRJ 4125 ). Paratypes: 23♂, 38♀, same data as holotype ( MNRJ 4126 ).
Diagnosis. Body pale yellow, with small brown spots in head. Eyes with 15 black ommatidia. Molar process of mandibles with seven penicils. Exite of maxillulae with eight simple teeth.
Measurements. Male, length: 3.58 mm, width: 1.33 mm; female, length: 5.04 mm, width: 1.99 mm. Description. Pigmentation of body faint, pale yellow, with small brown spots in head. Eyes black with 15 ommatidia. Pereonite Iwith anterior margins reaching the line of the eyes, and lateral lobes slightly ahead of median lobe which has apex rounded and straight sides ( Figs 109, 110 View Figs ). Pleon narrower than pereon ( Fig. 108 View Figs ), pleonites III–V with well developed epimera; telson triangular and depressed in the middle. Body surface with semi-circular scales. Pereon, pleon and telson covered with fan-shaped scale-setae and two axial rods ( Fig. 114 View Figs ). In posterior margins of pereonites they are large and wide, intercalate with small and narrow ones, and in lateral margins they are small. Nodulus lateralis with featureless base ( Fig. 115 View Figs ). Pereonite VII with only one nodulus lateralis on each side. Position of noduli laterales as illustrated ( Fig. 7 View Figs 1–7 ). Projected tubercles apically in merus and carpus of pereopods II–VII ( Fig. 118 View Figs ). Antenna ( Fig. 111 View Figs ) stretched reaches half of pereonite III. Second joint of antennal peduncle with dorsal keel, projecting over third join. Second joint of antennal flagellum with distal groove. Left mandible ( Fig. 112 View Figs ) without rods between molar and incisory processes. Number of penicils in molar process of left mandibles seven ( Fig. 112 View Figs ), right seven ( Fig. 113 View Figs ). Outer group of exite of maxillulae with four teeth, one smaller. Inner group of exite of maxillulae with four simple teeth ( Fig. 116 View Figs ). Endite of maxilliped without small teeth in distal outer border; distal border irregular ( Fig. 117 View Figs ). Pleopods without respiratory areas.
Male. Pereopods I ( Fig. 119 View Figs ) and VII ( Fig. 118 View Figs ) without sexual dimorphism. Pleopod Iwith subtriangular exopod ( Fig. 120 View Figs ); endopod with distal half slightly turned to the outside, apex simple ( Fig. 121 View Figs ). Pleopod II with exopod subtriangular with rounded apex ( Fig. 123 View Figs ); endopod narrowed in second half ( Fig. 122 View Figs ). Pleopod V with subtriangular exopod ( Fig. 124 View Figs ).
Remarks. Trichorhina tropidocerata sp. nov. is distinguished from Trichorhina lobata Verhoeff, 1946 which has a similar number of ommatidia (13 to 14) by 1) second joint of antennal peduncle with a keel; 2) endite of maxilliped without teeth (with three stout teeth in T. lobata ); 3) ischium of pereopod VII of male without keel; 4) scales in pereopods II–VII. Distinguished from all other species of the genus by the eyes composed by 15 ommatidia.
Etymology. Species name comes from Greek tropis = keel and ceras = feeler, due to the strong keel in antennalpeduncle.
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.