Laemolyta garmani ( Borodin, 1931 )

Mautari, Kelly Cristina & Menezes, Naércio Aquino, 2006, Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae), Neotropical Ichthyology 4 (1), pp. 27-44: 34-36

publication ID

http://doi.org/ 10.1590/S1679-62252006000100002

publication LSID

lsid:zoobank.org:pub:22071950-40B5-4151-AB3C-D6AE6A2607E9

persistent identifier

http://treatment.plazi.org/id/038187AC-9966-FC4E-FEF9-FC8CFEE582E3

treatment provided by

Carolina

scientific name

Laemolyta garmani ( Borodin, 1931 )
status

 

Laemolyta garmani ( Borodin, 1931)  

Fig. 12 View Fig

Anostomus (Schizodontopsis) garmani Borodin, 1931: 47–48   [original description, type locality: Jutahy (Jutaí), Içá, Lake Hyavary ( Lago Javarí )].

Laemolyta garmani: Myers, 1950: 197   [diagnosis, type locality]; Fowler, 1950: 208 [synonymy, distribution]; Géry, 1974: 152–153, 159 [description and identification key]; Ortega & Vari 1986: 12 [catalogue]; Garavello & Britski, 2003: 73 [catalog].

Laemolyta taeniata garmani: Géry, 1964: 466   [identification key].

Laemolyta garmani macra Géry, 1974: 153–154   , fig. (2), p. 154 [original description, type locality: rio Nacuray, identification key]; Weber, 1998: 8 [catalog of fishes]; Eschmeyer, 1998: 963 [catalog]; Garavello & Britski, 2003: 73 [catalog].

Anostomus (Laemolyta) garmani: Géry, 1977: 179   [identification key, distribution].

Anostomus garmani: Vari & Howe, 1991:5   . [Paratype, catalog]; Eschmeyer, 1998: 631 [catalog].

Material examined: 50 specimens (39.8–214.6 mm SL). Brazil. Amazonas: Silva, lago Saracá ( Lake Saracá at Silves ), 02°53’S, 58°21’W, December 1865, Thayer S. V. R, MCZ 19370 View Materials , holotype GoogleMaps   , 160.6 mm SL. Rio Hyutahy, rio Jutahy [ rio Jutaí , tributary of rio Solimões ), 02°43’S, 66°57’W, September 1865, W. James, S. V. R GoogleMaps   . Thayer & “Talismã”, MCZ 19346 View Materials , 7 View Materials   out of 14 paratypes, 78.4– 95.0 mm SL. Rio Içá, rio Putomajo [rio Içá, tributary of rio Solimões, near Brazilian-Colombian border], 03°07’S, 67°58’W, MCZ 19366 View Materials , 3 View Materials GoogleMaps   out of 5 paratypes, 63.6–72.9 mm SL. Rio Hyavary, rio Javary [rio Javarí, tributary of rio Solimões, at Peruvian Brazilian border], 04°21’S, 70°02’W, 19 October 1865, Bourget, D, MCZ 32099 View Materials , 1 View Materials GoogleMaps   out of 2 paratypes, 116.7 mm SL. Silva, lago Saracá [Lago Saracá at Silves], (02°53’S, 58°21’W), December 1865, Thayer, S. V. R MCZ 94491 View Materials GoogleMaps   , 1 paratype, 163.7 mm SL. Lago do Castanho , INPA 10823 View Materials   , 1, 126.2 mm SL. Janauacá, rio Solimões , INPA 15210 View Materials , 1 View Materials   , 75.3 mm SL. Janauacá, rio Solimões , INPA 10876 View Materials   , 1, 213 mm SL. Rio Tefé, Ressaca de Paula , Tefé, MZUSP 32402 View Materials , 14 View Materials , 159.9 View Materials   214.6 mm SL. Igarapé Baré, lago Amaná, mouth of rio Japurá , MZUSP 36070 View Materials   , 1, 151.8 mm SL. Igarapé Urumutum, mouth of rio Japurá , MZUSP 36072 View Materials   , 1, 178.1 mm SL. Rio Tefé , lago Tefé, MZUSP 61643 View Materials   , 1, 195 mm SL. Rio Tefé , lago Mucura, MZUSP 61814 View Materials , 1 View Materials   , 78.6 mm SL. Lago Manacapuru, rio Solimões , MZUSP 63614 View Materials   , 1, 188.3 mm SL. Barra do rio Negro , NMW 56988 View Materials   : 2, 1, 164.7 mm SL. Pará: lago Maria Preta, rio Capim , MZUSP 63828 View Materials , 1 View Materials   , 39.8 mm SL. Mato Grosso: rio Aripuanã, ilha do Castanhal , INPA 24727 View Materials   , 1, 168.8 mm SL. Rondônia: Forte Príncipe da Beira, rio Madeira , MZUSP 21381 View Materials , 1 View Materials   , 50.4 mm SL. Goiás: rio Araguaia , Xambioá, INPA 1601 View Materials   , 1, 142.3 mm SL. Ecuador. Napo: río Yasuni , laguna Jatuncocha FMNH 102132 View Materials , 1 View Materials   , 77.9 mm SL. Peru. Concordia: río Marañon, tributary of río Nacuary (open water), MHNG 2197.38 View Materials , 1 View Materials   , 71.1 mm SL, 59 (type material of Laemolyta garmani macra   ). Departamento Loreto, Quebrada de río Yanayacu W of Miraflores ( río Marañon ), ANSP 165049 View Materials , 1 View Materials   , 67.9 mm SL. Departamento Loreto, Provincia Maynas, Iquitos , Moronacocha, MZUSP 26333 View Materials , 5 View Materials   , 44.5–82 mm SL. Loreto, río Nanay , about 20 km above mouth, main channel, lateral channels and lateral ponds, USNM 383198 View Materials , 1 View Materials   , 70.2 mm SL.

Diagnosis. Laemolyta garmani   is the only species in the genus with 4 longitudinal scale rows above the lateral line. Its color pattern is very similar to that of L. taeniata   and L. orinocensis   , but the dark longitudinal midlateral stripe and the narrow longitudinal light stripes above the lateral line are less conspicuous in L. garmani   whereas L. orinocensis   has more lateral line scales (40–44 vs. 47–52).

Description. Morphometric and meristic data are presented in Table 3. Body moderately large (SL = 39.8-214.6 mm). Dorsal profile of body straight, posterodorsally-aligned from tip of snout to end of supraoccipital spine, straight and rising from this point to dorsal-fin origin, straight and posteroventrally-aligned from that point to caudal peduncle. Ventral profile of body approximately straight and posteroventrally-aligned from tip of lower jaw to near isthmus, slightly convex from that point to anal-fin origin. Dorsal limb gill rakers on first gill arch 9-11, 12-14 on ventral limb.

Scales large, 40-44 (42*, usually 43, Table 2) perforated on all of lateral line. Longitudinal scale rows from lateral line to dorsal-fin origin 4; scales rows from lateral line to anal-fin origin 4. Predorsal scales 10-13 (10*, usually 11), scales regularly arranged in most specimens. Scales rows around caudal peduncle 15-16 (15*, usually 16).

Dorsal-fin rays i or ii,10-12 (10*, usually 11); distal margin of fin slightly rounded. Anal fin short and slightly falcate, with i-ii,8-9 (8*, usually 8) rays. Pectoral fin rays i,10-14 (12*, usually 14). Pelvic fin rays i,8; distal margin of fin truncate. Vertebrae 40 (N=3).

Color in alcohol. Upper part of body dark with dark coloration extending ventrally to about 1.5 longitudinal scale rows above lateral line. Conspicuous dark, midlateral, longitudinal stripe covering 1 to 1.5 longitudinal scale rows and extending from tip of snout to rear of caudal peduncle; stripe sometimes wider in opercular region and narrower in snout region and near to caudal peduncle. Scales above lateral line with central posterior region lighter and forming narrow light stripes or linear pattern of light dots along body.

Dorsal, pectoral, pelvic and caudal fins hyaline. Anal and adipose fins with scattered dark chromatophores.

Distribution. Amazon basin ( Fig. 13 View Fig ).

Remarks. Borodin (1931) described Laemolyta garmani   and considered it to be very similar to L. taeniata   , but distinguished his species by having larger and fewer scales and by the presence of a darker longitudinal stripe, fins, and scales. He also mentioned that the longitudinal dark stripe extends onto the middle caudal-fin rays and is clearly visible in preserved specimens even after 64 years. These characteristics and the presence of dark chromatophores on the fins and scales although less evident, are also present in L. taeniata   , and, thus, are not useful to distinguish the two species. The two nominal species, however, can be separated primarily on the basis of scale size and consequently scale counts.

Laemolyta garmani   was originally considered by Géry (1964) to be a subspecies of L. taeniata   but later that author (1974) raised it to the species level and at the same time described a new subspecies, Laemolyta garmani macra   based on a small sample of young specimens that had a shallower body. The holotype of this subspecies was not examined but M. Toledo-Piza (DZ-IBUSP) made counts and measurements on the specimen and a photo ( Fig. 14 View Fig ) was provided by C. Weber (MNHG).

Figure 15 View Fig demonstrates that the body depth of the holotype of Laemolyta garmani macra   does not differ significantly when compared to all the examined specimens of L. garmani   . Although body depth varies to a certain extent among the specimens, there is no statistical difference to justify recognition of a subspecies.

In his original description of Laemolyta taeniata, Kner (1859)   mentioned that two specimens from Barra do rio Negro had thinner bodies, and some other divergent unspecified characters relative to the other examined specimens. One of these specimens, considered to be the syntype of L. taeniata   ( NMW 56988 View Materials :2) was examined and proved to be identical to all the other specimens of L. garmani   studied. This species was collected in sympatry with Laemolyta proxima   and L. taeniata   in Peru.

V

Royal British Columbia Museum - Herbarium

R

Departamento de Geologia, Universidad de Chile

MCZ

Museum of Comparative Zoology

NMW

Naturhistorisches Museum, Wien

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Characiformes

Family

Anostomidae

Genus

Laemolyta

Loc

Laemolyta garmani ( Borodin, 1931 )

Mautari, Kelly Cristina & Menezes, Naércio Aquino 2006
2006
Loc

Anostomus garmani:

Eschmeyer, W 1998: 631
1998
Loc

Anostomus (Laemolyta) garmani: Géry, 1977: 179

Gery, J 1977: 179
1977
Loc

Laemolyta garmani macra Géry, 1974: 153–154

Weber, C 1998: 8
Eschmeyer, W 1998: 963
Gery, J 1974: 154
1974
Loc

Laemolyta taeniata garmani: Géry, 1964: 466

Gery, J 1964: 466
1964
Loc

Laemolyta garmani: Myers, 1950: 197

Gery, J 1974: 152
Myers, G 1950: 197
Fowler, H 1950: 208
1950
Loc

Anostomus (Schizodontopsis) garmani

Borodin, N 1931: 48
1931