Scrapter variabilis, Mack & Kuhlmann, 2023

Mack, Anne & Kuhlmann, Michael, 2023, Revision of the nitidus species group of the bee genus Scrapter Lepeletier & Serville, 1828 (Hymenoptera: Apoidea), European Journal of Taxonomy 912, pp. 1-119 : 77-82

publication ID

https://doi.org/ 10.5852/ejt.2023.912.2373

publication LSID

lsid:zoobank.org:pub:B1958762-5D89-4DC9-A8CE-AABB06B7979C

DOI

https://doi.org/10.5281/zenodo.10420098

persistent identifier

https://treatment.plazi.org/id/DCB91BC0-CC27-4362-A4AC-A659F47F4249

taxon LSID

lsid:zoobank.org:act:DCB91BC0-CC27-4362-A4AC-A659F47F4249

treatment provided by

Plazi

scientific name

Scrapter variabilis
status

sp. nov.

Scrapter variabilis sp. nov.

urn:lsid:zoobank.org:act:DCB91BC0-CC27-4362-A4AC-A659F47F4249

Figs 54–57 View Fig View Fig View Fig View Fig

Diagnosis

The female of S. variabilis sp. nov. can be separated from that of all other species of this group by the following character combination: T3 anterior of premarginal line with a row of points ( Fig. 55C–D View Fig ); punctation of T1–T4 shallow, sparse ( Fig. 55C–D View Fig ); T1 anterior of premarginal line with row of points ( Fig. 55C–D View Fig ); propodeum with carinae, laterally often smooth ( Fig. 55A–B View Fig ). The male is characterized by punctation on discs of T2–T4 coarse and basally dense (i = 0.5 d), apically sparse (i = 2–3 d) ( Fig. 56E View Fig ), dense punctation on disc of T2 covers at most half of tergum ( Fig. 56F View Fig ); less punctation medially of T2 ( Fig. 56F View Fig ); basal hair bands on T3–T4 ( Fig. 56E View Fig ); propodeum completely coarsely carinate ( Fig. 56D View Fig ).

Etymology

Named after the variable colour of the metasoma, which varies from completely dark blackish-brown to largely reddish.

Type material (72 specimens)

Holotype

SOUTH AFRICA • ♂; Gemsbokrivier-Pad , 4.5 km NE of Grootdrif, road side ; 31°25′54″ S, 18°55′16″ E; 170 m a.s.l.; 20 Aug. 2011; MK leg.; SAMC. GoogleMaps

Paratypes

SOUTH AFRICA • 1 ♂; 12 km NW of Nieuwoudtville, Farm Avontuur, Fynbos ; 31°16′18″ S, 19°02′55″ E; 770 m a.s.l.; 25 Aug. 2010; MK leg.; RCMK GoogleMaps 1 ♂; same collection data as for preceding; 6 Sep. 2009; MK leg.; RCMK GoogleMaps 1 ♀; 3 km NW of Farm Kanolfontein, 22 km W of Sutherland , road side ; 32°23′17″ S, 20°26′32″ E; 1350 m a.s.l.; 18 Sep. 2017; MK leg.; RCMK GoogleMaps 1 ♀; Gemsbokrivier-Pad , 4.5 km NE of Grootdrif, road side ; 31°25′54″ S, 18°55′16″ E; 170 m a.s.l.; 10 Sep. 2010; MK leg.; RCMK GoogleMaps 1 ♀; same collection data as for preceding; 19 Aug. 2010; MK leg.; RCMK GoogleMaps 1 ♀, 2 ♂♂; same collection data as for preceding; 15 Aug. 2011; MK leg.; RCMK GoogleMaps 3 ♀♀, 3 ♂♂; same collection data as for preceding; 20 Aug. 2011; MK leg.; RCMK GoogleMaps 3 ♀♀, 1 ♂; same collection data as for preceding; 28 Aug. 2018; MK leg.; RCMK GoogleMaps 1 ♀; NHML 5 ♂♂; Knersvlakte , 5 km N of Grootdrif; 31°26′40″ S, 18°56′23″ E; 195 m a.s.l.; 21 Sep. 2007; KT leg.; RCMK GoogleMaps 2 ♂♂; same collection data as for preceding; 21 Sep. 2007; MK leg.; RCMK GoogleMaps 1 ♂; same collection data as for preceding; 14 Sep. 2007; KT leg.; RCMK GoogleMaps 1 ♀; Lamberts Bay, Strandveld , sand ; 32°06′19″ S, 18°18′16″ E; 5 m a.s.l.; MK leg.; RCMK GoogleMaps 1 ♂; N Cape, Fynbos, 15 km NW of Nieuwoudtville, Farm Engelsepunt ; 31°14′31″ S, 18°59′08″ E; 830 m a.s.l.; 28 Aug. 2003; KT leg.; RCMK GoogleMaps 1 ♂; N Cape, Fynbos, 15 km NW of Nieuwoudtville, near farm Engelsepunt ; 31°14′08″ S, 18°58′23″ E; 843 m a.s.l.; 30 Aug. 2003; KT leg.; RCMK GoogleMaps 3 ♀♀, 4 ♂♂; Roggeveld Mts , 2 km S of Farm Perdekloof, river, dolerite ; 31°47′35″ S, 19°58′16″ E; 1220 m a.s.l.; 1 Sep. 2017; MK leg.; RCMK GoogleMaps 6 ♀♀; same collection data as for preceding; 2 Sep. 2017; MK leg.; RCMK GoogleMaps 1 ♀; NHML 9 ♂♂; same collection data as for preceding; 24 Aug. 2018; MK leg.; RCMK 2 ♂♂; NHML 1 ♀, 4 ♂♂; same collection data as for preceding; 10 Sep. 2018; MK leg.; RCMK 1 ♀, 7 ♂♂; W. Cape, Knersvlakte, Vanrhynsdorp , urban garden ; 31°36′31″ S, 18°44′02″ E; 3 Aug. 2003; KT leg.; RCMK GoogleMaps 2 ♀♀; Nieuwoudtville, Botanic Gardens ; 31°22 S, 19°07 E; 760 m a.s.l.; Aug. 1923; HB leg.; SANC GoogleMaps 1 ♀; Clanwilliam Dist., Biedouw Valley ; 32°08′ S, 19°14′ E; 330 m a.s.l.; 5–7 Sep. 1987; CE leg.; SANC GoogleMaps 2 ♂♂; W Cape, Kunje Farm , 28 km SE of Citrusdal; 32°40′ S, 19°10′ E; 1100 m a.s.l.; 23 Sep. 2001; CE leg.; SANC GoogleMaps 1 ♀; Farm Liberty 50 km N of Ceres; 32°54′ S, 19°27′ E; 980 m a.s.l.; 27 Sep. 1990; CE leg.; SANC GoogleMaps 1 ♀; Vermont Dunes ; 34°26′ S, 19°10′ E; 0 m a.s.l.; Sep. 1977; VW leg.; SANC GoogleMaps .

Description

Female

BODY LENGTH. 7–7.4 mm.

HEAD. Slightly wider than long. Integument black, mandibles dark brownish to reddish. Face irregularly and sparsely covered with brownish to greyish hair, more densely around basis of antennae. Ocelli in line with posterior margin of compound eyes. Clypeus medially with longitudinal depression; punctation fine and irregular (i = 1–3 d); surface between punctures smooth and shiny ( Fig. 54C View Fig ). Malar area medially narrow, slightly curved. Antennal flagella ventrally yellow, dorsally black. Supraclypeal area at upper margin distinctly emarginated and edges slightly extended.

MESOSOMA. Integument black, pronotal lobe dark brown to black. Scutum coarsely and irregularly punctate, laterally dense (0.5 d), medially sparse (i = 1–1.5 d); surface between punctures smooth and shiny ( Fig. 54D View Fig ). Metanotum less than half as long as scutellum. Propodeum anterior with broad and coarse transitional carinae, posterior with fine transverse carinae, laterally often smooth ( Fig. 55A–B View Fig ). Scutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with short, brownish to greyish, erect hair.

WINGS. Yellowish-brown, stigma and wing venation brownish ( Fig. 54A–B View Fig ).

LEGS. Integument black, fore tibia with yellow spot. Vestiture greyish-white, scopa greyish to brownish, partly black ( Fig. 54A–B View Fig ).

METASOMA. Integument brownish, terga sometimes (partly) reddish, marginal zones yellowish-brown shimmering. Basolaterally on T2–T3 hair patches of greyish, short, erect hair; basally on T3 and T4 narrow hair band; T4 completely haired, basally more densely and shorter than apically; T3 anterior of premarginal line laterally row of hairs; prepygidial and pygidial fimbriae brownish to black ( Fig. 55C– D View Fig ). Discs of T1–T4 finely puncticulate, T1–T4 anterior of premarginal line with row of points; surface between punctures smooth and shiny ( Fig. 55C–D View Fig ).

Male

BODY LENGTH. 6.9–7.5 mm.

HEAD. Slightly wider than long. Integument black, mandibles dark brownish to reddish. Face densely covered with long, white, erect hair. Ocelli in line with posterior margin of compound eyes. Malar area medially narrow, slightly curved. Antennal flagella ventrally yellow, dorsally black.

MESOSOMA. Integument black, pronotal lobe dark brownish to black. Scutum irregularly punctate, laterally dense (i = 0.3 d), medially sparse (i = 1–1.5 d); surface between punctures smooth and shiny ( Fig. 56C View Fig ). Propodeum basolaterally with carinae, medially rugulose-areolate ( Fig. 56D View Fig ). Scutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with long, brownish to greyish, erect hair.

WINGS. Yellowish-brown, stigma and wing venation brownish ( Fig. 56A–B View Fig ).

LEGS. Integument brownish, fore and mid tibia with yellow spot. Vestiture greyish-white ( Fig. 56A–B View Fig ).

METASOMA. Integument brownish, marginal zone yellowish-brown shimmering. Disc of T1 without hair ( Fig. 56F View Fig ), T2–T4 basally greyish, dense, short, erect hair band, covering third of terga; T2–T4 anterior of premarginal line with row of short, erect, greyish hair ( Fig. 56E View Fig ). T1 basolaterally finer and more densely (i = 1 d) punctate than disc (i = 1–2 d) ( Fig. 56F View Fig ). T2–T4 basally more densely (i = 0.5 d) and finer punctate than apically (i = 2–3 d); medially more densely than laterally; dense punctation of T2 covers at most half of tergum; T2–T3 anterior of premarginal line with row of points; surface between punctures smooth and shiny ( Fig. 56E View Fig ).

TERMINALIA. Genitalia ( Fig. 57A View Fig ), S7 ( Fig. 57B View Fig ) and terminal plate of S8 ( Fig. 57C–D View Fig ) as illustrated.

Distribution

Only known from southern Namaqualand from Lamberts Bay in the west to the northern extension of the Roggeveld Mts south of Calvinia in the east.

Floral hosts

On Senecio sp. , Felicia sp. ( Asteraceae ) and various unidentified yellow Asteraceae .

Seasonal activity

August–September.

Remarks

A single male was found that morphologically corresponds to that of S. variabilis , but the punctation of terga is denser and surface of terga matt. Its identity is currently unclear so it is here provisionally labelled as S. sp. variabilis . The site data is recorded below:

SOUTH AFRICA • 1 ♂; Farm Avontuur , Fynbos, 12 km NW of Nieuwoudtville; 31°16′18″ S, 19°02′55″ E; 770 m a.s.l.; 13 Sep. 2022; HE leg.; RCMK GoogleMaps .

NHML

Libya, Tripoli, Natural History Museum

SANC

South Africa, Pretoria, South African National Collection of Insects

NHML

Natural History Museum, Tripoli

SANC

Agricultural Research Council-Plant Protection Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Colletidae

Genus

Scrapter

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