Scrapter nanus, Kuhlmann, 2014

Kuhlmann, Michael, 2014, Revision of the euryglossiform species of the Afrotropical bee genus Scrapter Lepeletier & Serville, 1828 (Hymenoptera: Apoidea: Colletidae), European Journal of Taxonomy 95, pp. 1-69 : 32-35

Scrapter nanus sp. nov.

urn:lsid:zoobank.org:act:9C2CAC47-4239-49B3-B7B1-DB8D2A0B780C

Figs 16–17

Diagnosis

The female of S. nanus sp. nov. can be separated from other species of this group by the combination of the following characters: head distinctly broader than long, supraclypeal area and clypeus densely and distinctly punctate, mostly finely sculptured and matt ( Fig. 16 C–D), scutum densely but relatively finely punctate, metanotum apicaly without distinct carinate depression ( Fig. 15 C–D), stigma brown, apical margins of metasomal terga black, terga densely and coarsely punctate ( Fig. 16B ). The male is characterized by an unmodified antenna, simple and black hind tibia and hind basitarsus ( Fig. 17A ), almost hairless, punctured and between punctures strongly sculptured abdominal terga ( Fig. 17C, E ) and form of S7 ( Fig. 17D ).

Etymology

Named for the small body size of the species.

Type material (172 specimens)

Holotype

SOUTH AFRICA: ♂, 12 km NW of Nieuwoudtville, Farm Avontuur , Fynbos, 770 m, 31°16'18" S, 19°02'55" E, 16 Aug. 2011, M. Kuhlmann ( SANC).

Paratypes

SOUTH AFRICA: 13 ♀♀, 2 ♂♂, same data as holotype (SANC 13 ♀♀, RCMK 2 ♂♂); 2 ♀♀, idem, 19 Sep. 2009, MK (RCMK); 2 ♀♀, 2 ♂♂, idem, 13 Aug. 2010, MK (NHML 2 ♀♀, 1 ♂, RCMK 1 ♂); 2 ♀♀, idem, 25 Aug. 2010, MK (NHML); 3 ♀♀, 3 ♂♂, idem, 17 Aug. 2011, H. Erhardt (SANC); 2 ♀♀, idem, 29 Aug. 2011, H. Erhardt (SANC); 2 ♀♀, idem, 4 Sep. 2011, H. Erhardt (SANC); 17 ♀♀, 16 ♂♂, idem, 18 Aug. 2012, MK (RCMK); 3 ♀♀, 1 ♂, idem, 24 Aug. 2012, MK (RCMK); 1 ♀, 2 ♂♂, idem, 3 Sep. 2012, MK (RCMK); 3 ♀♀, idem, 5 Sep. 2012, H. Erhardt (RCMK); 4 ♀♀, 1 ♂, N. Cape, Fynbos, 15 km NW of Nieuwoudtville, near Farm Engelsepunt, 843 m, 31°14'08" S, 18°58'23" E, 13 Sep. 2003, KT (NHML); 4 ♀♀, idem, 23 Sep. 2003, KT (NHML); 1 ♀, 1 ♂, N. Cape, Fynbos, 15 km NW of Nieuwoudtville, Farm Engelsepunt, 830 m, 31°14'31" S, 18°59'08" E, 22 Jul. 2003, KT (NHML); 2 ♀♀, idem, 23 Jul. 2003, KT (NHML); 1 ♂, idem, 26 Jul. 2003, KT (NHML); 1 ♀, 11 ♂♂, idem, 6 Aug. 2003, KT (NHML); 2 ♀♀, 12 ♂♂, idem, 7 Aug. 2003, KT (NHML); 7 ♀♀, 4 ♂♂, idem, 27 Aug. 2003, KT (NHML); 5 ♀♀, idem, 28 Aug. 2003, KT (NHML); 1 ♀, idem, 24 Sep. 2003, KT (NHML); 3 ♀♀, 2 ♂♂, idem, 27–29 Aug. 2003, KT (NHML); 1 ♀, Gemsbokrivier-Pad, 4.5 km NE of Grootdrif, road side, 170 m, 31°25'54" S, 18°55'16" E, 17 Aug. 2012, MK (RCMK); 1 ♂, 20 km S of Nieuwoudtville, Farm Papkuilsfontein, Fynbos, 680 m, 31°33'16" S, 19°08'31" E, 27 Aug. 2012, MK (RCMK); 10 ♀♀, 11 ♂♂, Ouberg Pass, 27 km SE of Vanrhynsdorp, Fynbos, 380 m, 31°48'07" S, 18°55'00" E, 8 Aug. 2012, MK (RCMK); 2 ♀♀, 1 ♂, idem, 13 Aug. 2012, MK (RCMK); 2 ♀♀, 1 ♂, idem, 23 Aug. 2012, MK (RCMK); 4 ♀♀, idem, 30 Aug. 2012, MK (RCMK).

Description

Female

BODY LENGTH. 4.5–4.8 mm.

HEAD. Head slightly wider than long. Integument black, except part of mandibles dark reddish-brown. Face sparsely covered with long, greyish, erect hair ( Fig. 16C ). Clypeus convex with coarse and dense punctation (i = 1–2 d); surface between punctures apically superficially sculptured and shiny, basally

denser and slightly matt ( Fig. 16 C–D). Malar area medially narrow, almost linear. Antenna dorsally blackish-brown, ventrally yellowish-brown.

MESOSOMA. Integument black. Mesoscutal disc between punctures superficially reticulate and slightly matt; disc densely (i = 1.5–2.0 d) and finely punctate ( Fig. 16 E–F). Metanotum slightly shorter than basal area of propodeum, apically with broad carinate depression ( Fig. 16F ). Propodeum basally distinctly and broadly carinate ( Fig. 16F ). Mesoscutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with short, greyish, erect hair ( Fig. 16A ).

WINGS. Slightly brownish; wing venation and stigma brown.

LEGS. Integument black to dark reddish-brown; fore tibia basally with small yellowish spot. Vestiture greyish-white, scopa greyish-white, dorsally blackish-brown.

METASOMA. Integument black, apical margins of terga partly narrowly translucent dark reddish-brown ( Fig. 16B ). Discs of T1 and T2 without hair, following terga with very short but increasingly more and longer hair; apical tergal hair bands missing on all terga ( Fig. 16B ). Prepygidial and pygidial fimbriae blackish-brown. T1 densely (i = 0.5–1.0 d) but very finely punctate, between punctures superficially sculptured but shiny; T2–T4 superficially sculptured, with dense (i = 0.5–1.0 d) but slightly coarser, superficial punctation; T2–T4 with superficially sculptured but shiny, broad apical tergal depression ( Fig. 16B ).

Male

BODY LENGTH. 4.3–4.7 mm.

HEAD. Head slightly wider than long. Integument black, except mandible partly dark reddish-brown. Face densely covered with long, greyish-white, erect hair. Malar area medially narrow, almost linear. Antenna dorsally dark brown, ventrally yellowish-brown except last three flagellar segments completely brown ( Fig. 17A ).

MESOSOMA. Integument black. Mesoscutal disc between punctures densely reticulate and matt; disc sparsely (i = 2–3 d) and finely punctate. Mesoscutum, scutellum, metanotum, mesepisternum and propodeum covered with long, greyish, erect hair ( Fig. 17A ).

WINGS. Slightly yellowish-brown; wing venation and stigma brown.

LEGS. Integument black, fore tibia anteriorly yellow, base of mid tibia with small yellow spot ( Fig. 17A ). Hind tibia apicomedially slightly swollen ( Fig. 17A ). Vestiture greyish-white.

METASOMA. Integument black, apical margins of terga partly narrowly translucent dark reddish-brown ( Fig. 17C, E ). Discs of T1–T3 without hair, following terga with sparse and short but successively more and longer hair; apical tergal hair bands missing on all terga ( Fig. 17C, E ). T1 and following terga densely (i ˂ 0.5–1 d), coarsely and irregularly punctate and strongly sculptured, matt; T2–T4 with broad, superficially sculptured but shiny apical tergal depression ( Fig. 17C, E ). S3 and particularly S4–S5 with long apical hair fringes.

TERMINALIA. Genitalia ( Fig. 17B ), S7 ( Fig. 17D ) and terminal plate of S8 ( Fig. 17F ) as illustrated.

Distribution

With one exception the species has only been found on sandy soils in Fynbos of the wider Nieuwoudtville area.

Floral hosts

Brassicaceae : white and blue Heliophila spp.

Seasonal activity

July–September.

Figures

Fig. 16. Scrapter nanus sp. nov., ♀. A. Lateral view. B. Metasoma (dorsal view). C. Head. D. Head (SEM). E. Thorax (dorsal view). F. Thorax (dorsal view, SEM). Scale bars: photos: 1 mm, SEM: 0.1 mm.

Fig. 17. Scrapter nanus sp. nov., ♂. A. Lateral view. B. Genitalia (dorsal view, SEM). C. Metasoma (dorsal view). D. S7 (dorsal view, SEM). E. Metasoma (dorsal view). F. S8, apical end (SEM). Scale bars: photos: 1 mm, SEM: 0.1 mm.

Fig. 15. Scrapter minutus sp. nov., ♀. A. Lateral view. B. Head (SEM). C. Thorax (dorsal view). D. Thorax (dorsal view, SEM). E. Metasoma (dorsal view). Scale bars: photos: 1 mm, SEM: 0.1 mm.