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324PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTOl,0^,"-.-*="rf^■ i.,'*"■_.j™ ■» ■"! »■ V *■■■*-'"^^T>.aCFig. 8. Kolpotocheirodon. figueiredoi male, MCP23455, SL 30.5 mm. (A) Ventral body surface in the area covering the pelvic bone showing a dark brown mark, nearly isosceles triangle shape, apparently externally delineating the area corresponding to the muscles inserted in the pelvic bone. (B) and (C) Left lateral view of the dorsal (B) and anal fins (C), showing the daik spots of tliose fins.barba & Weitzman, 2000: fig. 4). The pres- ence of hooks on the caudal fin is known for several compsurins, including Acinoch- eirodon melanogramma (hooks on caudal- fin rays 13-14, rarely on ray 15), Saccod- erma hastata (hooks on caudal-fin rays IS- IS), ""OdontostUhe^^ dialeptura (hooks on caudal-fin rays 12-16), and Macropsobry- con tirugiiaycmae (hooks on caudal-fin rays 12-14, plus several spinelets along the proximal half of caudal-fin rays 14 to 18). However, hooks are absent in Compsura heterura, Compsura gorgonae, and "O^/- ontostUbe^^ mitoptera. Malabarba & Weitz- man (1999, 2000) pointed out that although these hooks are present on the ventral lobe of the caudal fin in all these species, they do not all occur on the same caudal -fin rays in all species and are of different shapes. A previous analysis of character distribution(Malabai^ba et al., 1998) indicated the pres- ence of caudal-fin hooks as a synapomor- phy for the compsurin cheirodontines, and its absence a secondary reversal in some of its species. The inclusion of a new species bearing no hooks in the most basal genus of the tribe allows either the recognition of the presence of hooks as a synapomorphy for the tribe Compsurini with a reversal in K. figueiredoi, or the recognition of inde- pendent acquisitions of hooks in K. thel- oura and in the clade including the remain- ing compsurins. The first hypothesis is pre- ferred, since it better conforms with the pu- tative homology of caudal-fin hooks among compsurins (de Pinna 1991).Males of K, figueiredoi have a conspic- uous small black spot in the soft tissue be- tween midlength of first and second, and second and third branched dorsal-fin rays
VOLUME 1 17, NUMBER 3325Fig. 9. Detailed SEM images of the flaps bearing papillae along the anterior dorsal-fin ray in Kolpotochei- rodon theloum, male, MNRJ 18081, SL 26.2 mm, from lagoa Perta Pe, rio Sao Francisco drainage, Palmital. Minas Gerais, Brazil. (A) bar = 500 |xm; and (B) bar = 100 |xm.(Figs. 5, 8). This is absent (Fig. 7) in K. theloura (= character 65 in Malabarba 1998). Among compsurins, a similar spot is observed in species of Compsura, Macrop- sobrycon and Acinocheirodon, but is absent in species of Saccoderma, This spot was previously proposed as a synapomorphy for a clade including the last four genera cited above. Again, the inclusion of a new spe- cies in the most basal genus of the tribe allows both the recognition of the presenceof the dorsa] black spot as a synapomorphy for the tribe Compsurini with a reversal in K. theloura, or the recognition of indepen- dent acquisitions of the dorsal black spot in K. figueiredoi and in the clade including re- maining compsurins. The first hypothesis is preferred because it better conforms to the putative homology of the dorsal black spot among compsurins.A further character distinguishing K. fi- gueiredoi is its caudal-peduncle/caudal-finTable 1 . — Morphometries of Kolpotocheirodon figueiredoi, new species. Standard length is expressed in mm; measurements through head length are percentages of standard length; the last four entries are percentages of head length. Range includes the hoJoiype, MZUSP 70037, and paratypes MCP 22345, MZUSP 55219.Hblotype malenMalesi£>TlFemalesLowHighXLowHighXSDStandard length (mm)3051325.530.527.01023.831.026.4Snout to anal-fin origin59.71357363.060.01.301061.665.863.71.35Snout to dorsal-fin origin50.51345.752.949.51.801048.152.449,71,35Snout to pelvic-fin origin42.01342,046.744.51.51104534S.347.31.17Dorsal" fin base length13.11312.115.613.61.201011,914.313.20.72An;^l-fin base length25.91324.529.026.81.271023.526. S25.41.08Caudal peduncle length15.11312.515.514.10.9010ILl15.413.61.25Caudal peduncle depth13.81313.616.114.80.761011.313.812,50.83Depth at dorsal -fin origin3L1133L135J33.5L131033.639.435.41.86Dorsal- fin height29,81226 A29.828.0136925.227326.40,83Pelvic-fin length19.01316.719.318.20.711013.416.314.60.79Pectoral -fin length19J1317.520 J18.80.77s15.719.217.41.40Bony head length23,31323325,224.60,591023.025.024.10.72Snout length21.11320.323.822.01.101019.423.321. S1.35Upper jaw length3L01325.43L027.7L471022,730.227.92.13Horizontal eye diameter38.01333.338,536.21,391034.839.7373L68Least interorbital width29.61326.131.128.91311025.429.528.11.32
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citebank
Language
English
Volume
v. 117 2004
Addeddate
2011-10-10 18:09:17
Identifier
cbarchive_120094_c1882
Identifier-ark
ark:/13960/t5cc20h58
Ocr
ABBYY FineReader 8.0
Ppi
300
Publication_type
Journal Article
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Permission_to_digitize_granted_by_rights_holder
Secondary_title
Proceedings of the Biological Society of Washington.
Section
317
Source_organization
Biodiversity Heritage Library OAI Repository
Source_project
Biodiversity
Source_url
http://biodiversitylibrary.org/oai

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Reviewer: OddGrenadier - - December 4, 2020
Subject: This is about Kolpotocheirodon figueiredoi.
Correction: year=2004, not year=1882

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