Columbianum nahvalr Read & Enghoff, 2018, sp. nov.
Columbianum nahvalr sp. nov. urn:lsid:zoobank.org:act: FA3360D7-B4BD-4DB8-B248-97C92EF1517B Figs 1, 4–5 Diagnosis Fairly large pale species. Rounded and domed head with sharp distinction between head and narwhallike rostrum. Tubercles and setae on metazonites abundant and irregular, setae quite long...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2018
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| Online Access: | https://zenodo.org/record/3845979 https://doi.org/10.5281/zenodo.3845979 |
| Summary: | Columbianum nahvalr sp. nov. urn:lsid:zoobank.org:act: FA3360D7-B4BD-4DB8-B248-97C92EF1517B Figs 1, 4–5 Diagnosis Fairly large pale species. Rounded and domed head with sharp distinction between head and narwhallike rostrum. Tubercles and setae on metazonites abundant and irregular, setae quite long, giving a rather ragged appearance. Prozonites without tubercles. Channel between pro- and metazonite with horseshoeshaped tubercles. Limbus crenulated like posterior margin of pleurites. Accessory claws robust, roughly half the length of claw and situated on the dorso-anterior side of claw. Anterior gonopods resembling walking legs with a simple distal claw. Etymology Noun in apposition referring to the Old Norse name for the narwhal (Monodon monoceros Linnaeus, 1758). The head of our species strongly resembles the head of the narwhal. Material studied (6 ♂♂, 1 juv. ♂, 9 ♀♀) Holotype BRAZIL: ♂, Amazonas Province, Rio Taruma Mirim, 3°02´S, 60°17´W, Capoeira, secondary upland forest, Terra Firma, not inundated, 0–7 cm, K29 TU, 25 Apr. 1983, Adis and Rodrigues leg. (INPA). Paratypes BRAZIL: 1 ♂, 2 ♀♀, 1 juv. ♂, same data as for the holotype (1 ♂ NHMD, the rest INPA). Other specimens (4 ♂♂, 7 ♀♀) All from the same locality with dates between Apr. 1982 and Apr. 1983. Specimens split between INPA, NHMUK, NHMD and ZMUM. Description MEASUREMENTS. Body length ♂: 11–29 mm, ♀: 9–18. Body width ♂: 0.8–1.6 mm, ♀: 0.8–1.2. Number of podous tergites ♂: 43–85, ♀: 41–106. Number of apodous tergites: 0–2. COLOUR. Various shades of yellow/white. Perhaps with darker spots near repugnatorial glands. BODY SHAPE. More or less parallel-sided in central trunk region. Attenuated anteriorly and posteriorly. HEAD (Fig. 4 C–D). Densely pilose all over and covered in regular, sub-circular tubercles, including the antennae. Width (between antennal sockets) 0.3–0.6 mm. Head very sharply defined from rostrum in dorsal view, slightly rounded anteriorly. In lateral view head so domed that an abrupt ‘step’ is formed between head and rostrum. Length of ... |
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