Proctorus armatus LeConte, 1876

Lewis, Jake H. & Anderson, Robert S., 2022, A revision of the North American genus Proctorus (Coleoptera, Curculionidae, Ellescini) with descriptions of two new species, ZooKeys 1131, pp. 135-153 : 135

publication ID	https://dx.doi.org/10.3897/zookeys.1131.90392
publication LSID	lsid:zoobank.org:pub:E32D09D3-C60B-4171-90C5-4393B13F3E47
persistent identifier	https://treatment.plazi.org/id/D77BDC11-53AE-5317-8D37-CDB71C088EBF
treatment provided by	ZooKeys by Pensoft
scientific name	Proctorus armatus LeConte, 1876
status

Treatment

Figs 1D-F View Figure 1 , 4 View Figure 4 , 7C, D View Figure 7 , 8A View Figure 8

Proctorus armatus LeConte, 1876: 212 [type locality: south side of Lake Superior (USA)]. LeConte 1878: 620. O’Brien and Wibmer 1982: 94. Alonso-Zarazaga and Lyal 1999: 78. Bousquet et al. 2013: 326.

Material examined.

Lectotype (here designated): USA: south side of Lake Superior , Type 5244 (1 female, MCZC), MCZ-ENT00005224.

Paralectotype. USA: south side of Lake Superior , Type 2 5244 (1 female, MCZC), MCZ-ENT00529966 .

Non-type material.

Canada: Alberta: Tp. 39, Rge. 27, 1 April 1985, B.F. & J.L. Carr, on Populus (3, CNCI; 1 CMNC), JHLRSA_PROC_313 - JHLRSA_PROC_315, JHLRSA_PROC_321; Calgary, 4-5 July 1974, C.V. Nidek (1, CMNC), JHLRSA_PROC_322; Manitoba: Aweme, 7 April 1925, N. Criddle (1, CNCI), JHLRSA_PROC_317; Riding Mountain Park, 9 June 1937, W.J. Brown (1, CNCI), JHLRSA_PROC_319; Winnipeg, 15 April 1916, L.H. Roberts (1, MCZC), MCZ-ENT00726923; Northwest Territories: Fort Smith, 13 June 1988, B.F. & J.L. Carr (1, CNCI), JHLRSA_PROC_320; Ontario: Moose Factory, 26 June 1948, W.Y. Watson (1, CNCI), JHLRSA_PROC_316. USA: Alaska: Willow, Fishhook Road near Deception Creek (61.7622°N, 150.4603°W), 11 August 2014, R. Progar & S. Bresney, on Populus (1, UAMIC), UAM100378225; Two Rivers (64.88925°N, 147.0871°W), 24 May 2015, S. Melerotto (1, UAMIC), UAM100430466; Michigan: Marquette, (2, MCZC (LeConte and Horn Collection)), MCZ-ENT00772797, MCZ-ENT00772798; Marquette, Hubbard & Schwarz (1, USNM), JHLRSA_PROC_330; New Mexico: Cloudcroft, 20 July 1978, J.M. Campbell (1, CNCI), JHLRSA_PROC_318.

Diagnosis.

Length 3.8-4.1 mm. Body (especially rostrum and femora) dark, although elytra often with orange stripe extending posteriorly from humerus. Protibiae of male dentate on inner edge. Elytra without clear, distinct x-pattern of white scales. Fifth ventrite of male with two prominent ventral projections apico-laterally which are connected by a transverse ridge; also with a single, smaller ventral projection positioned baso-medially. Apical tooth of metatibiae of male straight. Aedeagus in dorsal view slightly rounded to truncate, not emarginate or significantly expanded laterally.

Notes on types.

This species was described based on three specimens collected along the south side of Lake Superior. Two examined syntypes in the MCZC bear several types of labels. Both specimens bear a rectangular brown label reading "J.L. LeConte Coll.", a square red type label reading "Type 5224" and "Type 2 5224", and MCZC unique identifier labels (see specimens examined). One specimen also bears a rectangular brown label reading " Proctorus armatus Lec." and a rectangular white label reading "Jan.-Jul. 2005 MCZ Image Database". The location of the third (male) syntype specimen is unknown; however, the identity (i.e., P. armatus ) of that specimen is clear, based on LeConte’s original description. Here, we designate one of the known P. armatus syntypes (MCZ-ENT00005224) as a lectotype to fix the identity of this species.

Taxonomic comments.

See same section for Proctorus truncatus .

Remarks.

This species is likely most closely related to P. truncatus as males of both species bear a basomedial projection on the fifth sternite (lacking in other species; males only), have a straight metatibial spur (lacking in P. decipiens ; only males), and are both large and dark in general form. Furthermore, examined specimens of P. truncatus and P. armatus were only collected from Populus when such data was recorded, whereas examined specimens of P. decipiens and P. emarginatus have only been collected from Salix species. Although more field data should be amassed to support this difference in host plant preference, an emerging pattern of differing host plant preference is apparent and supports the hypothesis that P. truncatus and P. armatus are closely related.

LeConte (1876) remarked that P. armatus lacks femoral teeth. However, we note that the four species treated here all possess a distinct tooth on all femora.