Hexanchorus mcdiarmidi

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Maier C (2013) A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species. ZooKeys 329 : 33–91, doi. Versioned wiki page: 2013-09-05, version 36643, https://species-id.net/w/index.php?title=Hexanchorus_mcdiarmidi&oldid=36643 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Maier2013ZooKeys329,
author = {Maier, Crystal A.},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species},
year = {2013},
volume = {329},
issue = {},
pages = {33--91},
doi = {10.3897/zookeys.329.4961},
url = {http://www.pensoft.net/journals/zookeys/article/4961/abstract},
note = {Versioned wiki page: 2013-09-05, version 36643, https://species-id.net/w/index.php?title=Hexanchorus_mcdiarmidi&oldid=36643 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species
A1 - Maier C
Y1 - 2013
JF - ZooKeys
JA -
VL - 329
IS -
UR - http://dx.doi.org/10.3897/zookeys.329.4961
SP - 33
EP - 91
PB - Pensoft Publishers
M1 - Versioned wiki page: 2013-09-05, version 36643, https://species-id.net/w/index.php?title=Hexanchorus_mcdiarmidi&oldid=36643 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.329.4961

Wikipedia/ Citizendium:

<ref name="Maier2013ZooKeys329">{{Citation
| author = Maier C
| title = A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species
| journal = ZooKeys
| year = 2013
| volume = 329
| issue =
| pages = 33--91
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.329.4961
| url = http://www.pensoft.net/journals/zookeys/article/4961/abstract
| pmc =
| accessdate = 2019-12-10

}} Versioned wiki page: 2013-09-05, version 36643, https://species-id.net/w/index.php?title=Hexanchorus_mcdiarmidi&oldid=36643 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Coleoptera
Familia: Elmidae
Genus: Hexanchorus

Name

Hexanchorus mcdiarmidi Spangler & Staines, 2003Wikispecies linkPensoft Profile

==

For a complete description and illustrations of genitalia, see Spangler and Staines 2003[1].

Material examined

VENEZUELA: Barinas State: “VENEZUELA: Barinas State; 8°03.341'N, 70°56.597'W, 203m; nr. Quiri, Rio Quiu; 15.vii.2009; leg. W. Shepard; ex. bulk sample; VZ09-0715-03Z” (99 specimens SEMC). Distrito Capital:“VENEZUELA, Dto. Federal; Los Caracas; 19 January 1985; P. Spangler, R. Faitoute; W. Steiner, & A. Conover” (6 paratypes USNM) Mérida State: “VENEZUELA: Mérida State; 8°57.205'N, 71°17.620'W, 88m; W. of Tucani; 21.vii2009; Gross sample from river; leg. Shepard; VZ09-0721-04Z” (17 specimens SEMC). Zulia State: “VENEZUELA: Zulia State; 9°50.513'N, 72°48.334'W. 252m; Perija N.P. Tukuko: Rio Tukuko; 5.vii.2009; leg. Short & Gustafson; riffle/rocks in river; VZ09-0705-01B” (96 specimens SEMC). “VENEZUELA: Zulia State; P.N. Perija: Tukuko; 18 vii.2008; Rio Marpito” “Andrew E. Z.; Short, leg.” (5 specimens SEMC). “VENEZUELA: Zulia El; Tucuco (51 km S.O. de; Machiques); 24-VI-1992” “Colector:; J. Camacho” (11 specimens MALUZ).

Diagnosis

Hexanchorus mcdiarmidi can be disinguished from all other Hexanchorus species in Venezuela by the presence of a greenish iridescent sheen on the dorsal setae (Fig. 48), the narrow parameres, and pronotum with only a shallow postero-median impression (Fig. 48).

Intraspecific variation

This species varies slightly from black to dark brown in color, additionally, there may be slight variation in the greenish iridescence of the elytral setae. Hexanchorus mcdiarmidi has a purplish and orange iridescent sheen while submerged in alcohol (Short, pers. comm.). There is variation in size (2.9–3.4 mm TL) and slight differences in punctation among specimens.

Habitat and distribution

Hexanchorus mcdiarmidi is widespread in lower altitude (<300 m elevation) streams throughout western Venezuela (Fig. 4). They can be found in dense aggregations on water-splashed emergent rocks in small to medium sized swift-flowing streams and rivers with rocky substrate.

Associated species

While no other species of Hexanchorus were collected at the same localities as Hexanchorus mcdiarmidi, other laraines collected in the same habitats include Disersus dasycolus, Phanocerus congener and Phanocerus clavicornis, and Pharceonus volcanus. Other water beetles collected at the same sites include: Anacaena spp. and Enochrus spp. (Hydrophilidae).

Taxon Treatment

  • Maier, C; 2013: A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species ZooKeys, 329: 33-91. doi

Other References

  1. Spangler P, Staines C (2003) Three new species of Hexanchorus Sharp, 1882 (Coleoptera: Elmidae: Larainae) from South America. Insecta Mundi 17(1–2): 45-48.

Images