Lestinogomphus calcaratus Dijkstra

Dijkstra, Klaas-Douwe B., Kipping, Jens & Mézière, Nicolas, 2015, Sixty new dragonfly and damselfly species from Africa (Odonata), Odonatologica 44 (4), pp. 447-678: 552-556

publication ID

http://doi.org/ 10.5281/zenodo.35388

publication LSID

lsid:zoobank.org:pub:A0592344-0F17-4463-8CE2-02900DBB8F20

DOI

http://doi.org/10.5281/zenodo.5640244

persistent identifier

http://treatment.plazi.org/id/03A25264-CA72-FF9A-EEF8-FDF4406CFED0

taxon LSID

lsid:zoobank.org:act:03A25264-CA72-FF9A-EEF8-FDF4406CFED0

treatment provided by

Donat

scientific name

Lestinogomphus calcaratus Dijkstra
status

sp. nov.

Lestinogomphus calcaratus Dijkstra   ZBK   sp. nov. – Spurred Fairytail (Type Photo 27, Photo 41, Figs 16, 17)

Taxonomy

Lestinogomphus Martin, 1912   is among the few African genera where unnamed species may outnumber named ones. The taxonomy is complicated by imperfect type material, e.g., the male holotype of L. africanus (Fraser, 1926)   lacks S 4–10 and the holotype of L. minutus Gambles, 1968   is female. COI analysis, often of more easily obtained larvae and adult females, revealed distinct clusters that we name if good adult male material with distinct appendage morphology is available ( Tree 5). Nonetheless females may prove critical in resolving the taxonomy: those associated (often genetically) with L. congoensis Cammaerts, 1969   , L. minutus   and the present new species have two prominent spines medially on the occiput, which L.angustus   , L.nefrens   sp. nov., L. obtusus   sp. nov. and the species associated with L. africanus   (see L. nefrens   ) lack. Dijkstra (2007) suggested that the female holotype of Microgomphus bivittatus Pinhey, 1961   also belongs to Lestinogomphus   based on the thoracic markings and stretched S 10, as illustrated by Pinhey (1961 c). However, in Lestinogomphus   the collar spots are typically not isolated but connected and continue up the middorsal ridge, while S 10 is even longer, lacking the slight dorsal kink illustrated. These features, as well as the illustrated vulvar scale, match the poorly known genus Mastigogomphus Cammaerts, 2004 that was formerly a subgenus of Neurogomphus Karsch, 1890   (see Dijkstra & Clausnitzer 2014). As Pinhey’s figure matches that of the M. chapini (Klots, 1944)   holotype by Cammaerts (2004; fig. 40 e) almost perfectly, and that species is also geographically most proximate, it seems most practical to relegate it to synonymy with that [new synonymy].

Material studied

Holotype ♂. RMNH.INS. 508420, Angola, Uíge Province, 4 km NE of Negage, Canuango river and bog , small blackwater river with sections in palm swamp and others with open marshy borders, and adjacent boggy areas, 1225 m a.s.l. (7.7351 ° S 15.2887 ° E), 29 -xi- 2012, leg. K.-D.B. Dijkstra, RMNH View Materials GoogleMaps   .

Further material. ANGOLA (Uíge Province): 1 ♂ ( RMNH.INS. 559535), locality as holotype, 02-x- 2013, leg. K.-D.B. Dijkstra, RMNH View Materials   . 1 ♂ ( RMNH.INS. 559491), 6 km N of Quitexe, Lumanie river just E of Quitexe-Uíge road , sandy and rocky river with bushy and reedy banks ( Photo 41), 686m a.s.l. (7.8882 ° S 15.0434 ° E), 30 -ix- 2013, leg. K.-D.B. Dijkstra, RMNH View Materials GoogleMaps   . 1 ♀ ( RMNH.INS. 559505), 8 km N of Quitexe, Lumanie river (tributary of Loge) near Quitoque, just E of Quitexe-Uíge road, forested sandy and stony riv- er in farmbush, 677 m a.s.l. (7.8654 ° S 15.0450 ° E), 30 -ix- 2013, leg. K.-D.B. Dijkstra, RMNH GoogleMaps   . 1 ♀ ( RMNH.INS. 508362), 14 km WSW of Uíge, Loge valley, Loge river and two side streams , large murky river and two clear streams in degraded lowland rainforest, 602 m a.s.l. (7.6701 ° S 14.9381 ° E), 22 -xi- - 2012, leg. K.-D.B. Dijkstra, RMNH View Materials GoogleMaps   . CONGO-KINSHASA ( Katanga   ): 1 lar- va ( RMNH.INS. 505417), Kiubo, Lufira (large, Kiubo Falls) and Luvilombo (small, rocky) rivers , and adjacent flooded areas, gallery forest and degrad- ed miombo woodland, 840–880 m a.s.l (9.52 ° S 27.05 ° E), 08-xi- 2011, leg. K.- D.B. Dijkstra, RMNH View Materials GoogleMaps   . GABON (Haut-Ogoué): 1 ♀ ( RMNH.INS. 554413), Franceville-Okondja road, 2 km before Okila , muddy and gravelly (4 m wide, <50 cm deep) forest stream, 364 m a.s.l. (1.0789 ° S 13.5669 ° E), 27 - - ix- 2012, leg. N. Mézière, RMNH View Materials GoogleMaps   . 1 ♀ ( RMNH.INS. 508894), same locality, 14 -x- 2013, leg. N. Mézière, RMNH View Materials GoogleMaps   . TANZANIA (Kigoma Region): 1 larva ( RMNH.INS. 502900), Malagarasi river 6 km upstream of Ilagala , 775 m a.s.l. (5.2010 ° S 29.9008 ° E), 14 -viii- 2009, leg. K.-D.B. Dijkstra, RMNH View Materials GoogleMaps   .

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Genetics

Six unique haplotypes (n = 9) nearest to L. congoensis   , but confirmed L. angustus   and the somewhat similar L. silkeae Kipping, 2006   were not sampled ( Tree 5).

Male morphological diagnosis

Very small dragonfly (Hw 19.0–20.0 mm; n = 2) that recalls L. angustus Martin, 1912   by (a) the pair of large teeth near the base of the epiproct dorsum ( Fig. 16). However, (1) is much darker overall, with a black band on the fronto-clypeal suture and a thick black rim to the labrum, the pale area on the collar not extending posteriorly of the middorsal tooth, the humeral and interpleural black stripes thick and enclosing a narrow green stripe, the metapleural black stripe also thick, and the tibiae black without pale streaks ( Fig. 17); (2) the distal border of the posterior hamule is shallowly notched, rather than almost straight; (3) S 10 is shorter, its dorsal length is 1.4–1.7 × its apical height, rather than 1.7–2.2 ×; (4) the curved portions of the cerci bear a small external lobe subapically; and (5) the subbasal teeth of the epiproct have a narrower base, thus appearing sharper and leaning into S 10 ( Fig. 16).

Etymology

Latin “with spurs” refers to the prominent spines on the epiproct (masculine adjective).

Range and ecology

The type material is from northern Angola, but females from Gabon and larvae from Katanga   and western Tanzania are genetically similar and thus likely to belong to the same species ( Tree 5). On this basis, appears to favour fairly open streams and rivers bordered by bushes and trees between 350 and 1 250 m a.s.l.

RMNH

Netherlands, Leiden, Nationaal Natuurhistorische Museum ("Naturalis") [formerly Rijksmuseum van Natuurlijke Historie]