Enchiridium evelinae Marcus 1949
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publication ID |
https://doi.org/ 10.11646/zootaxa.3873.5.3 |
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publication LSID |
lsid:zoobank.org:pub:687DC4E0-9B78-4AF0-9DD2-8B868E3B8EB5 |
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DOI |
https://doi.org/10.5281/zenodo.6143926 |
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persistent identifier |
https://treatment.plazi.org/id/927D87F1-FFDA-3209-FF78-7D336EE3F944 |
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treatment provided by |
Plazi |
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scientific name |
Enchiridium evelinae Marcus 1949 |
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Enchiridium evelinae Marcus 1949 View in CoL
( Figs. 13 View FIGURE 13 and 14 View FIGURE 14 )
Material examined. One specimen (MNRJ-PLAT 48, 26 x 10 mm) as sagittal sections of reproductive structures (16 slides), collected 27.10.2007 at Enseada 2, Ilha do Papagaio, Cabo Frio, Brazil (22°53'45.43"S, 41°59'5.54"W). Two specimens (MNRJ-PLAT 49, 31 x 10 mm; 44 x 11 mm), the larger as sagittal sections of reproductive structures (29 slides), collected 28.10.2007. One specimen (MNRJ-PLAT 50, 20 x 5 mm) collected 0 9.09.2007. Four specimens (MNRJ-PLAT 51, 33 x 10 mm; 25 x 9 mm; 19 x 5 mm; 6 x 4 mm) collected 0 8.12.2007. Two specimens (MNRJ-PLAT 53, 19 x 5 mm; 29 x 10 mm), the larger as sagittal sections of reproductive structures (14 slides), collected 20.04.2008. One specimen (MNRJ-PLAT 54, 26 x 6 mm) collected 21.04.2008. Three specimens (MNRJ-PLAT 56, 28 x 10 mm; 20 x 8 mm; 17 x 7 mm) collected 30.08.2008. One specimen (MNRJ-PLAT 58, 18 x 5 mm) collected 15.11.2008. Four specimens (MNRJ-PLAT 59, 32 x 14 mm; 26 x 10 mm; 30 x 13 mm; 22 x 9 mm) collected 13.12.2008. Two specimens (MNRJ-PLAT 60, 26 x 10 mm; 31 x 11 mm) collected 16.10.2009. All collected at Praia das Conchas, Cabo Frio, Brazil (22°52'33.05"S, 41°58'39.27"W). One specimen (MNRJ-PLAT 52, 23 x 8 mm) collected 10.12.2007. One specimen (MNRJ-PLAT 57, 24 x 9 mm) collected 0 1.09.2008. One specimen (MNRJ-PLAT 61, 17 x 9 mm) as sagittal sections of reproductive structures (14 slides) collected 18.06.2010. The three collected at Canal de Itajuru, Cabo Frio, Brazil (22º53’11’’S, 42º00’08’’W). One specimen (MNRJ-PLAT 55, 26 x 10 mm) as sagittal sections of reproductive structures (12 slides) collected 0 3.08.2008 at Saco do Mimi, Ilha do Papagaio, Cabo Frio, Brazil (22º53’51’’S, 41º58’52’’W). Depth: 6m. All specimens or parts preserved in ethanol 70%.
Distribution. Enchiridium evelinae was described from São Paulo State, Brazil (type locality; Marcus 1949); it was also reported from Curaçao ( Marcus & Marcus 1968), Panama (Rawlinson 2008), and recently from Rio Grande do Norte (Bahia et al. 2012).
Diagnosis. Long and narrow body; dorsal region cream with brown dots, more densely disposed at the median line; margin with orange dots; pharynx reaches 1/3 of the body length; seminal and prostatic vesicles highly muscularized; penis papilla and male atrium long.
Taxonomic remarks. We observed some differences between our specimens and those studied previously (Bahia et al. 2012), mostly related to dot arrangement, with some specimens having more densely clustered dots than others. ( Fig. 14 View FIGURE 14 ). Nutritional status also influenced the coloration, with specimens that presented a full intestine being darker than ones with empty intestine. As we sampled a wider range of sizes we had variations in measures, but the proportion between them remained the same. Some specimens were found to have oviducts with oocytes that reached 130 µm in diameter. Characteristics observed in the specimens we studied are in accordance with the original description of Enchiridium evelinae ( Marcus 1949) . Specimens found in Cabo Frio (from 6 x 4 mm to 44 x 11 mm) reached larger sizes as originally described (15 x 3.3 mm) and later (33 x 8 mm) by Marcus & Marcus (1968).
Ecology. We found our specimens at the three sampled sites. This species was very frequent, which can indicate some adaptative trait, a probable generalist behavior, or more successful larval settlement.
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.