Dolops longicauda ( Heller, 1857 )

Tavares, Luiz E. R., 2017, A new species of Argulus (Crustacea, Branchiura, Argulidae) from the skin of catfish, with new records of branchiurans from wild fish in the Brazilian Pantanal wetland, Zootaxa 4320 (3), pp. 447-469: 464-466

publication ID

https://doi.org/10.11646/zootaxa.4320.3.3

publication LSID

lsid:zoobank.org:pub:D883949F-9Aae-4596-81Ae-445C40B07Bbe

persistent identifier

http://treatment.plazi.org/id/03CB87CA-FFD7-A01D-FF59-9F4994F03B57

treatment provided by

Plazi

scientific name

Dolops longicauda ( Heller, 1857 )
status

 

Dolops longicauda ( Heller, 1857) 

( Figure 11View FIGURE 11)

Gyropeltis longicauda  HELLER, 1857 HELLER (1857): 101 –102, PL. I, fIGS. 1–19; Gyropeltis doradis  , CORNALIA, 1860: CORNALIA (1860): 13 –14, fIGS. 1–18; G. longicauda  : KRøyER (1863): 25 –28, PL. I, fIGS. 4A –E; G. longicauda  AND G. doradis  : THORELL (1864): 64; D. longicauda  AND Dolops doradis  : BOUVIER (1899): 13, 21–35, fIGS. 31–38; D. longicauda  AND D. doradis  : WILSON (1902): 704, 732–733, 734, PL. XV, fIGS. 75–76; D. longicauda  : THIELE (1904): 14 –17, fIGS. 16–25; MOREIRA (1912): 149, PL. III, fIG. 3; MOREIRA (1913): 10, PL. V, fIG. 1; LAHILLE (1926): 11, fIGS. 8–9; LEMOS DE CASTRO (1985): 12, 56; THATcHER (2006): 393, 396, 400, fIG. 9.25.

Type host. Hydrocyon brevidens  (= Salminus brasiliensis  [Cuvier 1816]) ( Heller 1857)

Type locality. FLONA de Ipanema, Sorocaba River Basin, municipality of Iperó, region of Sorocaba, state of São Paulo, Brazil (see remarks) 

Other hosts and localities. Aequidens tetramerus (Heckel, 1840)  , Limoncocha, near the junction of the Jivino and Napo rivers, Ecuador ( Hugghins 1970), Igarapé Fortaleza, Amazon River Basin, Macapá, Amapá, Brazil (Tavares-Dias et al. 2014); S. brasiliensis  (syn. S. brevidens  , S. maxillosus  , Salminus cuvieri  , H. brevidens  ), Province Entre Rios in Parana River Basin, Arroyo de las Conchas, Corpus, Rio Colastiné, Santa Fé, Zona de Rosario, in Uruguay River Basin, Gualeguaychú, Ibicuycito, Missiones, in de la Plata River, Argentina ( NMNHAbout NMNH 2014; Ringuelet 1943, 1948), Paraguay River, Corumba, Cáceres, state of Mato Grosso, Pirassununga, Mogi Guaçu River state of São Paulo, Brazil ( Calman 1912; Morais Filho & Schubart 1955; Moreira 1912, 1913); Metynnis lippincottianus (Cope, 1870)  , Igarapé Fortaleza, Amazon River Basin, Macapá, Amapá, Brazil (Tavares- Dias et al. 2014); Oxydoras kneri Bleeker, 1862  ( Ringuelet 1943); Oxydoras niger (Valenciennes, 1821)  , Amazon River Basin, Brazil ( Bouvier 1899; Thatcher 2006); Potamotrygon  sp., Santa Fe Province, Parana River, Rosario, Argentina ( Ringuelet 1948); P. corruscans  , Santa Fe Province, Parana River, Rosario, Argentina ( Ringuelet 1948); Pterodoras granulosus (Valenciennes, 1821)  ( Ringuelet 1943); S. maculatus, Caiçara  bays, upper Paraguay River basin, Northern Pantanal, Cáceres, state of Mato Grosso, Brazil (Fontana et al. 2012); Serrasalmus nattereri  (= P. nattereri  ), Parana River, zona de Rosario, Argentina ( Ringuelet 1943); Serrasalmus  sp., Limoncocha, near the junction of the Jivino and Napo rivers, Ecuador ( Hugghins 1970).

Material deposited. 21 vouchers: 5 adult female and 5 adult male ZUEC-CRU 3518, 5 adult female and 2 adult male INPAAbout INPA 2309, 6 July 2008; 2 adult females and 2 adult males MZUSPAbout MZUSP 36231, 8 July 2009, in ethanol 70%, Salminus brasiliensis  , skin, Cuiabá River Cuiabá River, Parque Nacional do Pantanal Matogrossense, Mato Grosso, Brazil (17°49′37.77″ S, 57°22′53.38”W)

Measurements. Based on 6 males and 18 females. Total length (mm) 20.2 (13.5–25) in males, 22 (11.2–36.5) in females. Carapace length 7.7 (5.6–9.3) in males, 8.8 (5.7–13.7) in females; maximum carapace width 7.9 (4.6– 10) in males, 9.4 (6.1–15) in females. Carapace posterior sinus length 2.2 (1.1–3.3) in males, 3.2 (1.5–4.9) in females; width 2.2 (1.7–2.8) in males, 3.3 (1.8–6) in females. Cephalothorax length 4.7 (2.6–5.8) in males, 5.1 (3.1–8.2) in females; anterior width 4.6 (2.6–5.6) in males, 5.2 (4.3–7.3) in females. Abdome length 13.9 (9.6–18) in males, 12.9 (8.9–22) in females; width 3.3(2.1–3.9) in males, 3.8 (2.7–6) in females. Abdome posterior sinus length 11.8 (8.5–13.8) in males, 12.4 (4.7–20) in females; width 2.4 (1–3.4) in males, 2.8 (0.4–7.8). Eyes diameter (µm) left 274.5 (225–289) and right 283.4 (200–350), in male, left 267.8 (224–300) and right 278.4 (212–350) in female; transverse distance between eyes (µm) 2156.7 (1850–2768) in male, 2377.5 (1400–3651) in female. First maxillae length 2 (0.9–2.9) left and 2 (1–3) right in males, 2 (1.1–4.2) left and 2.3 (1.3–4.5) right in females; Hook of the first maxillae length (µm) 1072.5 (875–1300) left and 1156.6 (825–1300) right in males, 1281 (836.6–1450) left and 1366.5 (1019–1900) in females. Seta-like structure length (µm) 151 (129–178, n = 4) left and 170.8 (118.8–198, n = 4) right in males, 186.5 (138.6–243, n = 16) left and 201.7 (158.4–297, n = 16) right in females.

Remarks. The first and second antennae of D. longicauda  are located in a groove in the cephalon, as others species of Dolops  (Avenant et al. 1989; Silva-Souza et al. 2011). Nevertheless, the first antennae of D. longicauda  is 4-segmented ( Fig. 11AView FIGURE 11), a characteristic shared with some South American species of Dolops  . The basal segment of the first antennae of D. longicauda  does not have any projections or spines, being bar-shaped with expanded ends, which Ringuelet (1943) described as “…un refuerzo o rodete no saliente cerca del borde posterior…”. The proximal part of the second segment also does not have any projections or spines, similar to what we observed in D. carvalhoi  . The labrum ( Fig. 11BView FIGURE 11) in mouth tube in D. longicauda  , and probably other species of the genus, arise anteriorly, deeper than in species of Argulus  . The second maxillae of D. longicauda  is 6-segmented ( Fig. 11CView FIGURE 11). The sixth segment bears five pairs of hooks or claws ( Fig. 11DView FIGURE 11), with the distal one the larger. These decrease proximally, so that the most proximal resemble spines.

Heller (1857) described D. longicauda  when he proposed Gyropeltis Heller, 1857  , later synonymized with Dolops  by Bouvier (1899). Before Bouvier’s observations, Krøyer (1863), examined the type specimen, a female deposited by Vincent Kollar at the Natural History Museum of Vienna, as “ Dixiphurus brasiliensis  ”. An additional note on the type specimen in Johann Natterer's iternary revealed the old “Fábrica de Ferro São João do Ipanema” or Fundição Ipanema, nowadays a national forest known as FLONA de Ipanema, in the municipality of Iperó in the region of Sorocaba, in the state of São Paulo, as the type locality for this species (Peter C. Dworschak, pers. comm. March 2015). In this note by Natterer, a river called “Seruaba” was mentioned as the hydrographic system where the type specimen was recovered. Although we could not identify this river, it is probable that the Sorocaba River is the hydrographic basin of the type locality.

The morphology, the length and especially the length of the abdomen of the specimens of D. longicauda  , made its diagnosis easier. Additionally, there is a structure similar to an additional flagella on the second leg of the male, inserted in the dorsal side of the coxa and laterally directed, which Ringuelet (1943) also indicated, removing any doubts about the identification of D. longicauda  .

NMNH

Smithsonian Institution, National Museum of Natural History

INPA

Instituto Nacional de Pesquisas da Amazonia

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Maxillopoda

Order

Arguloida

Family

Argulidae

Genus

Dolops

Loc

Dolops longicauda ( Heller, 1857 )

Tavares, Luiz E. R. 2017
2017
Loc

Gyropeltis longicauda

THATcHER 2006: 393
LAHILLE 1926: 11
MOREIRA 1913: 10
MOREIRA 1912: 149
THIELE 1904: 14
WILSON 1902: 704
BOUVIER 1899: 13
THORELL 1864: 64
KRoyER 1863: 25
CORNALIA 1860: 13
HELLER 1857: 101
1857