11,521 research outputs found
Cyclopecten cancellus Dijkstra 1991
No full textCyclopecten cancellus Dijkstra, 1991 Figs 15H–I,K, 16 Cyclopecten cancellus Dijkstra, 1991: 21, figs 66–70; Dijkstra, 2001: 90, figs 33–35; Dijkstra & Moolenbeek, 2008: 18; Dijkstra & Maestrati, 2008: 97; Dijkstra & Maestrati, 2013b: 474. Type data. Holotype (lv) RMNH56560, 14 paratypes (v) RMNH56561–56566. Type locality: Indonesia, Flores Sea, off SW Salayer, 6°22.4'S 120°26.3'E, dead, 130–155 m (SNELLIUS-II stn 4.153). Additional material examined. — AUSTRALIA: QUEENSLAND: off Cairns, 16°36'12"– 16°35'54"S 146°15'24"– 146°14'18"E, dead, 110–201 m (1 v, C.165464). WESTERNAUSTRALIA: S of Cowaramup Bay, near mouth of Margaret River, 33°57'S 114°59'E, dead (2 v, C.165468); Kilcarnup, N side of Margaret River, 33°57'S 114°59'E, dead, beach (1 v, C.374666); Ellensbrook, 33°55'S 115°0'E, dead, beach (2 v, WAM S12952); Cowaramup, 33°52'S 115°0'E, dead (2 v [rudimentary internal riblets], WAM S12559; 1 v, WAM S12535); Rottnest Island, 32°0'S 115°30'E, dead, beach (9 v, WAM415.91); Rottnest Island, Bathurst Point, 32°0'S 115°30'E, dead, beach (1 v, WAM414.91); Rottnest Island, Ricey Beach, 32°0'S 115°30'E, dead, beach (3 v, WAM413.91; 1 v, C.165465); Cottesloe, Cable Station, 33°0'S 115°45'E, dead (1 v, WAM481.91); NW of Beagle Island, 29°43'S 114°17'E, dead, 274–283 m (1 v, C.165466). — NEW CALEDONIA: off New Caledonia, 20°16'S 169°51'E, alive, 85–100 m (2 pr, C.165234). Figure 16. Distribution of Cyclopecten cancellus Dijkstra (circles), C. horridus Dijkstra (star), C. powelli Dell (triangle) and C. reticulatus sp. nov. (squares). Description. Shell small, up to c. 3 mm high, convex, subcircular, opaque, whitish to cream, wider than high, inequivalve, almost equilateral, left valve slightly more convex than right, auricles almost equal in size, umbonal angle c. 100°. Left valve with coarse reticulate sculpture with scaly intersections, radial riblets (c. 10) more prominent than commarginal lamellae, both widely spaced, commencing at 0.5 mm shell height and increasing in prominence ventrally, with secondary interstitial radial riblets. Auricles with 1–2 radial riblets crossed by prominent commarginal lamellae. Right valve with closely spaced commarginal lamellae. Anterior auricle with 2–4 weak radial riblets, posterior smooth. Dorsal margin straight. Byssal notch moderately deep, byssal fasciole narrow. Habitat. Living in the sublittoral and bathyal zones amongst rubble on soft bottoms. Distribution. Indonesia, 130–375 m, dead; Vanuatu, 140–175 m, dead (Dijkstra, 1991, 2001); Fiji, 500–614 m, dead (Dijkstra & Maestrati, 2008). Now also from New Caledonia (85–100 m) and Australia (beach drift and 110–283 m, dead). Remarks. The present species is similar to the type specimens from Indonesia, although some specimens from Western Australia have some rudimentary internal riblets, which are lacking in typical specimens. Cyclopecten cancellus is a new record for Australia (empty shells only).Published as part of Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), pp. 113-330 in Records of the Australian Museum (Rec. Aust. Mus.) (Rec. Aust. Mus.) 70 (2) on page 149, DOI: 10.3853/j.2201-4349.70.2018.1670, http://zenodo.org/record/529901
Cyclochlamydidae Dijkstra & Maestrati 2012
No full textKey to genera of Cyclochlamydidae occurring in Australia 1 Shell small, triangular prodissoconch on lv, smooth or radially and/or commarginally sculptured on lv, rv with hexagonal microstructure................................................................................................................. Cyclochlamys —— Shell small with a weakly inflated prodissoconch on lv........................................................... 2 2 Shell smooth or radially and/or commarginally sculptured on lv, many specimens posteriorly oblique, rv with hexagonal microstructure................................................................................................................... ChlamydellaPublished as part of Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), pp. 113-330 in Records of the Australian Museum (Rec. Aust. Mus.) (Rec. Aust. Mus.) 70 (2) on page 157, DOI: 10.3853/j.2201-4349.70.2018.1670, http://zenodo.org/record/529901
Parvamussium retiolum Dijkstra 1995
No full textParvamussium retiolum Dijkstra, 1995 Figs 8C,E,K, 9 Parvamussium retiolum Dijkstra, 1995b: 29, figs 39–42, 97; Dijkstra, 2001: 85; Dijkstra & Marshall, 2008: 10, figs 8A–G, 9; Dijkstra & Maestrati, 2008: 93; Spencer et al., 2009: 198; Dijkstra & Maestrati, 2013b: 473. Type data. Holotype (pr) MNHN Moll 21171. Paratypes (39pr+6v): 35 MNHN Moll 21172, 2 C.201713, 2 ZMA Moll. 395026, 2 NMNZ M.268537, 2 NSMT-Mo70541, 2 USNM890860. Type locality: Coral Sea, Chesterfield Is., 19°47'S 158°44'E, alive, 685–700 m (MUSORSTOM 5 stn CP 363). Additional material examined. — AUSTRALIA: QUEENSLAND: SE of Swain Reefs,22°20'09"– 22°26'16"S 153°17'05"E,dead, 187 m (1 v,C.462543); E of Lady Elliott Island, 24°0'S 153°06'E, dead, 476–531 m (4 v, C.165535). WESTERN AUSTRALIA: SW of Cape Naturaliste, 33°44.5'S 114°26.1'E, dead, 183–238 m (3 v, C.165545); W of Garden Island, 32°15'S 115°03'E, dead, 250–258 m (1 v, C.165550); W of Rottnest Island, 31°0'S 114°51'E, dead (1 v, C.165548); 80 n. ml NNE of Port Hedland, 19°03.6'– 19°04'S 119°03.4'– 119°05'E,dead, 82 m (3 v, C.157711); N of Port Hedland, 18°40'S 117°55'E, dead, 150 m (1 v, C.157679); c. 240 ml NE of Broome, 14°37'S 123°40'E,dead, 80 m (19 v, C.165494 [in part]); c. 140 ml N of Cape Leveque, 14°29'S 123°03'E,dead, 124 m (many v [atypical],C.165493). CORAL SEA:Elizabeth Reef, 29°53.82'S 159°01.65'E, alive, 420 m (1 pr, C.165246). —NEW CALEDONIA: S of Ile des Pins, 22°50'S 167°34'E, dead, 274 m (many v, C.165441; 4 v, C.165439); 4 ml S of Ile des Pins, 22°50'S 167°34'E, dead, 275 m (16 v, C.165443 [in part]; 1 v, C.165442 [in part]; 5 v, C.165444). Description. Shell up to c. 16 mm high, fragile, inequivalve, inequilateral, left valve slightly more convex than right, translucent white, auricles unequal, umbonal angle c. 95°. Inner surface with 10 riblets, plus 1 posterior auricular riblet and 4 rudimentery auricular riblets on left valve and 3 on right, ends of riblets somewhat nodose. Left valve sculptured with delicate commarginal lamellae crossing closely spaced radial riblets, somwhat coarser near umbonal area than elsewhere, more delicate near ventral margin.Auricles with fine radial riblets crossed near margin by fine commarginal lamellae. Right valve with regular commarginal lirae, closely spaced near umbonal area, more widely spaced near ventral margin. Microscopic interstitial radial scratches near margins. Auricles with commarginal lamellae, more prominent anteriorly. Strongly developed scales on anterodorsal margin. Byssal notch narrow. Habitat. Living on the continental shelf and in the bathyal zone, free amongst soft sediment. Distribution. Chesterfield Islands, Coral Sea, 620–700; New Caledonia, 720–800 m (Dijkstra, 1995b, 2001); New Zealand: many lots listed by Dijkstra & Marshall (2008: 10, fig. 9) from the Norfolk Ridge N of Norfolk Island (26°25.2'S 167°11.2'E, 714–756 m, 11 v, NMNZ M.171056) to South Ritchie Trough, off Mahia Peninsula, central E North Island (39°58.59'S 178°14.18'E, alive, 990 m, 2 pr, NIWA V466), in 316–1000 m (Dijkstra & Marshall, 2008: 11, fig. 9); Fiji, 310–699 m; Tonga, 391–510 m (dead) (Dijkstra & Maestrati, 2008). Now also Queensland and Western Australia. Maximum depth range of live-taken specimens is 310–1000 m. Present specimens in 82–531 m, alive in 420 m. Remarks. Parvamussium retiolum is closely similar to P. maorium, but differs in the sculpture of the left valve (P. maorium is smooth on the central part of the disc and radially sculptured laterally, P. retiolum commarginally and radially sculptured throughout). Other morphological characters are very similar. Parvamussium retiolum is a new record for Australia.Published as part of Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), pp. 113-330 in Records of the Australian Museum (Rec. Aust. Mus.) (Rec. Aust. Mus.) 70 (2) on page 138, DOI: 10.3853/j.2201-4349.70.2018.1670, http://zenodo.org/record/529901
Anguipecten picturatus Dijkstra 1995
No full textAnguipecten picturatus Dijkstra, 1995 (Fig. 5C) Anguipecten picturatus Dijkstra, 1995b: 17 (nomen novum for Pecten aurantiacus Adams & Reeve, 1850, non Pecten aurantiacus J. de C. Sowerby, 1820, nec Defrance, 1825). MATERIAL EXAMINED. — China Sea. Holotype (spm) (BMNH 1950.11.14.8). Tubuai. BENTHAUS, stn DW 1957, 23°19’S, 149°29’W, 558-1000 m, 1 lv. DISTRIBUTION. — Réunion Island, Thailand, southern Japan, Philippines, Papua New Guinea, Solomon Islands, Coral Sea, Fiji (MNHN, coll. HD, unpubl. data). Depth range 20-130 m (alive) (unpubl. data, coll. HD). Now also Austral Islands (new record), only a single valve at 558 m depth. REMARKS The present specimen is nearly similar to the type material from the China Sea, although the commarginal microsculpture is somewhat more delicate and more closely spaced.Published as part of Dijkstra, Henk H. & Maestrati, Philippe, 2010, Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Entoliidae and Pectinidae) from the Austral Islands (French Polynesia), pp. 333-358 in Zoosystema 32 (2) on page 352, DOI: 10.5252/z2010n2a6, http://zenodo.org/record/452113
Glorichlamys Dijkstra 1991
No full textKey to species of Glorichlamys from Australia 1 Shell c. 20 mm high, circular to oblong, flattened to weakly inflated, 9–13 radial costae, 1–3 intercalated radial riblets, interstitial commarginal lamellae, byssal notch deep, byssal fasciole broad........................................................................................ G. elegantissima —— Shell with quadripartite radial costae........................................................................................ 2 2 Shell c. 25 mm high, subcircular to oblong, valves weakly inflated, radial costae quadripartite, byssal notch shallow, byssal fasciole narrow.................................................................................................... G. quadrilirataPublished as part of Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), pp. 113-330 in Records of the Australian Museum (Rec. Aust. Mus.) (Rec. Aust. Mus.) 70 (2) on page 192, DOI: 10.3853/j.2201-4349.70.2018.1670, http://zenodo.org/record/529901
Pentaphlebia n. sp. Dijkstra, Kalkman, Dow, Stokvis & Tol, 2014, n. sp.
No full textPentaphlebia n. sp. Dijkstra, K.-D.B. & Vanappelghem, C. RMNH Gabon Haut-Ogooué 502559 25924867 KF369831 KF370230 KF369482 ODOPH216-13Published as part of Dijkstra, Klaas-Douwe B., Kalkman, Vincent J., Dow, Rory A., Stokvis, Frank R. & Tol, Jan Van, 2014, Redefining the damselfly families: a comprehensive molecular phylogeny of Zygoptera (Odonata). Supporting Information Table 2: List of analysed samples., pp. 1-10 in Systematic Entomology 39 (1) on page 7, DOI: 10.5281/zenodo.665290
Eleuthemis umbrina Dijkstra & Lempert, sp. nov.
No full textEleuthemis umbrina Dijkstra & Lempert sp. nov. – Shadow Firebelly (Type Photo 46, Photos 59–60, Fig. 28) Taxonomy First recognised in Liberia as a distinctly coloured ecological form of E. buettikoferi or possibly a good species (Lempert 1988). Genetic data show it is among the most distinct taxa within this formerly monotypic genus, particularly relative to the topotypical and sympatric E. buettikoferi (Tree 7). The characters described for E. b. monardi Schmidt, 1951 from nearby Guinea-Bissau agree with the latter. Material studied Holotype ♂ . RMNH.INS.501604, Liberia, Grand Gedeh County, Putu Iron Ore Mining concession, Jebeh River at Johnsonville, sandy forested river (Photo 60), 216 m a.s.l. (5.6329 ° N 8.1413 ° W), 10 -ii- 2011, leg. K.-D.B. Dijkstra & A. Dayeker, RMNH. Further material. GHANA (Eastern Region): 3 ♂, Asikam Gold Mine and Wankobi stream, 291 m a.s.l. (6.2017 ° N 0.5365 ° W), 19 -vi- 2016, leg. K.-D.B. Dijkstra, RMNH. 2 ♂, Asiakwa, rocky stream SW of Asiakwa, 264 m a.s.l. (6.2533 ° N, 0.5130 ° W), 09-v- 2000, leg. K.-D.B. Dijkstra, RMNH. GHANA (Western Region): 4 ♂, bridge over Ankasa River near tourist camp, 60 m a.s.l. (5.215 ° N 2.650 ° W), 09-iv- 2000, leg. K.-D.B. Dijkstra, RMNH. GHA- NA (Volta Region): 3 ♂ 1 ♀, Agumatsa River between Wli Waterfalls and village, 261 m a.s.l. (7.1167 ° N 0.5833 ° E), 26 -iv- 2000, leg. K.-D.B. Dijkstra, RMNH. LIBERIA (Grand Gedeh County): 2 ♂ (RMNH.INS.501603), as holotype, RMNH. 1 ♂, several larvae (RMNH.INS.501503), Putu Iron Ore Mining concession, Sawleh river (main stream of central valley between Mts Ghi and Jideh) between Jackson’s and Biodiversity Camps, small sandy and gravelly river in somewhat disturbed rainforest, 266 m a.s.l. (5.6592 ° N 8.1979 ° W), 21 -i- 2011, leg. K.-D.B. Dijkstra & A. Dayeker, RMNH. 2 larvae (RMNH.INS.501622), W of Jawordee, muddy, sandy and gravelly stream, part forested, part open with aquatic vegetation, 208 m a.s.l. (5.6167 ° N 8.3260 ° W), 12 -ii- 2011, leg K.-D.B. Dijkstra, RMNH. LIBERIA (Nimba County): 3 ♂, northern bank Yah (Dayea) River near Gbapa, Gbaleh Creek, calm sandy river in cocoa plantations, 470 m a.s.l. (7.507 ° N 8.638 ° W), 07- x- 2010, leg. K.-D.B. Dijkstra, RMNH. 1 ♂, Lugbeyee-Bonlah Road, stream on eastern side of Bonlah, large, gravelly and sandy stream in farmbush, 437 m a.s.l. (7.507 ° N 8.638 ° W), 13 -x- 2010, leg K.-D.B. Dijkstra, RMNH. 2 ♂ (RMNH.INS.501416), same locality, 04-i- 2010, leg K.-D.B. Dijkstra, RMNH. LIBERIA (Grand Gedeh County): 2 ♂, Cavalla River, 33 km E of Zwedru, 206 m a.s.l. (6.083 ° N 7.83 ° W), 03–05-iii- 1982, leg. & coll. J. Lempert. 1 ♂, Dugbi River, 24 km E of Zwedru, 224 m a.s.l. (6.083 ° N 7.83 ° W), 19 -xi- 1983, leg. & coll. J. Lempert. SIERRA LEONE (Eastern Province): 1 ♂, 1 larva, Gola Forest, Gagbe stream, 1 km W of Mogbaima, parts in forest, parts in disturbed area with diamond pits, 136 m a.s.l. (7.6574 ° N 10.7788 ° W), 02-iii- 2011, leg. K.-D.B. Dijkstra, RMNH. 1 ♂, Gola Forest, Mogbai River upstream from Mogbaima, mostly gravelly and rocky river in forest, 139 m a.s.l. (7.6596 ° N 10.7676 ° W), 03-iii- 2011, leg. K.-D.B. Dijkstra, RMNH. 2 ♂ (RMNH.INS.503110), Gola Forest, Wibwa (Wegbua) stream at Mayengema, 152 m a.s.l. (7.6426 ° N 10.7898 ° W), 01-iii- 2011, leg. K.-D.B. Dijkstra, RMNH. Genetics Four unique haplotypes (n = 6) form the sister-group of all other Eleuthemis species except E. libera sp. nov. (Tree 7). Male morphological diagnosis Morphologically like E. buettikoferi with (a) moderate size, Hw 24.5 – 26.0mm (n= 3); (b) the distinct black border to labrum; (c) the vertex and occipital triangle blackened at least basally; (d) the Fw discoidal field entirely of two or more rows of cells; (e) the abdomen being entirely whitish pruinose on the upperside with maturity; (f) the largely blackish secondary genitalia; and (g) the acute tip to the hook of the hamule (like Fig. 28). However, (1) the ventral portions of the sternites of S 1–9 are yellow marked with black on the ventral carinae up to the (largely) black S 9, rather than orange with black carinae at most up to S 5, with S 9 largely orange (Photo 59). While both species vary strongly, the new species also tends to have (2)the frons darkened at the base of its central furrow, anterior to the medi- an ocellus, and not entirely pale brown; (3) more contrasting black and yellow thoracic markings with usually a black line along the humeral suture’s full length, thus not absent on its ventral section, and the black stripe on the metepimeron dead-ended dorsally, i.e., not curving forward to (almost) join the metapleural black line; and (4) the dark tips of Fw are less sharply defined and extend below Pt, rather than just touching its distal end, while Hw tips are often more darkened too. Etymology Latin “of shade” refers to the darker habitat and abdominal underside of the species (feminine adjective). Range and ecology Largely sympatric with E. buettikoferi between 100 and 500 m a.s.l. from Sierra Leone to Ghana, inhabiting shady rather than sunny sections of often the same forested streams and rivers.Published as part of Dijkstra, Klaas-Douwe B., Kipping, Jens & Mézière, Nicolas, 2015, Sixty new dragonfly and damselfly species from Africa (Odonata), pp. 447-678 in Odonatologica 44 (4) on pages 617-621, DOI: 10.5281/zenodo.3538
Application of digital image processing for pot plant grading
No full textThe application of digital image processing for grading of pot plants has been studied. Different techniques e.q. plant part identification based on knowledge based segmentation, have been developed to measure features of plants in different growth stage. Growth experiments were performed to identify grading features and to test whether it is possible to grade pot plants in homogeneous groups. Judgement experiments were performed to test whether it is possible to grade plants as good as man do. For the grading experiments decision models based on regression equations and neural networks have been developed
Ceriagrion obfuscans Dijkstra, Meziere & Kipping, sp. nov.
No full textCeriagrion obfuscans Dijkstra, Mézière & Kipping sp. nov. – Darkening Citril (Type Photo 17, Photos 18, 25–26, 39–40, 52, Fig. 11) Taxonomy Belongs to the genetically, morphologically and ecologically distinct varians -group of Ceriagrion, which aside from C. annulatum Fraser, 1955 and C.rubellocerinum Fraser, 1947 includes C. platystigma Fraser, 1941 that Dijkstra (2005 a) synonymised with C. varians (Martin, 1908). The latter two are similar by (a) the never blackened head and only occasionally blackened S 3–7; (b) the apex of S 10 with fine and often almost indiscernible black denticles; and (c)the narrow cerci that are at most as wide as long, with at most their apical teeth touching (Fig. 11). However, C. platystigma is distinguished by (1)the labrum and thorax being pale brown to deep red, rather than orange; (2) the red Pt and S 3–7 can become (at least partly) black; (3) the penis’ short apex that does not reach the bend of its stem in lateral view; and (4) the cerci being separated by a space that is somewhat wider than their width, with the apical teeth wide apart in dorsal view (Fig. 11) [rejected synonymy]. The synonymy of C. sanguinostigma Fraser, 1955 with C. varians (Martin, 1908) was reconfirmed in MRAC. The new species is the most distinct one in the group and was treated as such by Dijkstra & Clausnitzer (2014), overlapping geographically with all other group species except possibly C.rubellocerinum. Material studied Holotype ♂ . Congo-Kinshasa, Province Orientale, Lower Lomami, Iloko stream on Lieki-Lileke path, swampy blackwater stream, 390 m a.s.l. (0.6548 ° N 24.2685 ° E), 27 -v- 2010, leg. K.- D.B. Dijkstra, RMNH. Further material. CONGO-KINSHASA (Province Equateur): 2 ♂ 4 ♀ (RMNH.INS.502151), Lower Itimbiri, Loeka River (= Gwolo) mouth, tributary, forest and Itimbiri around mouth, 360 m a.s.l. (2.038 ° N 22.826 ° E), 16 -v- 2010, leg K.- D.B. Dijkstra, RMNH. 2 ♀, Lower Itimbiri, Lokeke and Liha streams on Engengele-Yamoenga road, swampy streams in farmbush, 375 m a.s.l. (2.11 ° N 22.69 ° E), 13 -v- 2010, leg K.- D.B. Dijkstra, RMNH. 1 ♀, Lower Itimbiri, Kona forest, swamp forest, 362 m a.s.l. (2.040 ° N 22.788 ° E), 12 -v- 2010, leg. K.- D.B. Dijkstra, RMNH. 1 ♀, Lower Itimbiri, Loeka Riv- er (= Gwolo), lower 3 km of blackwater tributary, 375 m a.s.l. (2.05 ° N 22.82 ° E), 11 -v- 2010, leg. K.- D.B. Dijkstra, RMNH. CONGO-KINSHASA (Province Orientale): 6 ♂ (RMNH.INS.502141), 2 ♀, as holotype, RMNH. 1 ♂ 2 ♀, Lower Lomami, Lieki camp, river bank and adjacent forest and farmbush, 420 m a.s.l. (0.685 ° N 24.240 ° E), 28 -v–02-vi- 2010, leg. K.- D.B. Dijkstra, RMNH. 3 ♂ 2 ♀ (RMNH.INS.502301), E of Isangi, Yandja River to Yandja Lac (= Etang Loholo), farmbush, swamp forest and blackwater lake, 385 m a.s.l. (0.73 ° N 24.28 ° E), 06-v- 2010, leg. K.- D.B. Dijkstra, RMNH. 22 ♂ (RMNH.INS.502198, RMNH.INS.502278, RMNH.INS.502300), 6 ♀ (RMNH.INS.502286), 2 ♂ ♀, between Yangole and Yaeoli on Yaekela-Lilanda road, blackwater swamp forest, 376 m a.s.l. (0.8017 ° N 24.2978 ° E), 03– 05-v- 2010, leg. K.- D.B. Dijkstra, RMNH. 3 ♀ (RMNH.INS.502188, RMNH.INS.502196), Yaekela, flooded forest and farmbush (Photo 39), 410 m a.s.l. (0.81 ° N 24. 28 ° E), 01–02-v- 2010, leg. K.-D.B. Dijkstra, RMNH. 1 ♂, Low- er Lomami, research transect at Ekukumu camp near Yabogesa, river bank and adjacent forest and farmbush, 350 m a.s.l. (0.6804 ° N 24.1903 ° E), 30 -v- - 2010, leg K.-D.B. Dijkstra, RMNH. GABON (Haut-Ogooué Province): 1 ♂ (RMNH.INS.554374), Batéké Plateau, Léconi Valley, Eaux Claires, Camps des Pygmés, swamp and forest along a sandy river, 434 m a.s.l. (1.4549 ° S 14.1785 ° E), 16 -ix- 2012, leg. N. Mézière, RMNH. 1 ♂, Batéké Plateau, Léconi Valley, Eaux Claires, forest swamp, 440 m a.s.l. (1.4543 ° S 14.1747 ° E), 26 -i- - 2012, leg. N. Mézière, A. Günther, J. Kipping & H. Krahnstöver, RMNH. 1 ♂, Léconi road 5 km after Bongoville, Sablière d’Ekala, forest swamp, 393m a.s.l. (1.6068 ° S 13.9137 ° E), 07-xi- 2010, leg. N. Mézière, RMNH. 12 ♂, Batéké Plateau, 18 km NW of Léconi, sandy stream and swamp in dense gallery forest, 425 m a.s.l. (1.4472 ° S 14.1661 ° E), 29 -ix- 2013, (Photo 25) leg. J. Kipping, CJKL. 3 ♂ 1 ♀, same locality, 20 -ix- 2014, leg. J. Kipping, CJKL. Genetics Four unique haplotypes (n = 10) are very distinct but nearest to the rest of the varians -group. Male morphological diagnosis Medium-sized damselfly (Hw 20.0–22.0 mm; n = 16) that belongs to the varians -group by (a) the blackish rhomboidal Pt with the anterior border shorter than the posterior; (b) the cerci that are wider than long and (almost) touch each other in dorsal view; and (c) the paraprocts without a heeled lower border in lateral view (Fig. 11). However, unlike other group species, (1) the orange to red head, thorax and S 1–2 blacken with age; (2)the humeral and metapleural sutures lack dark dots in the fossae, although this character is obscured with the darkening of the body; (3) the penis has a notably long, broad and squarish apex and lacks small horn-like cones on each side of its base; (4) S 3–10 are always blackish, while at least S 8–10 always remain red in other species; (5) the cerci are round rather than pointed in lateral view; and (6) the paraprocts are just over twice as long as the cerci, rather than under (Fig. 11). Etymology Latin “making dark” refers to the body that blackens with age and the gloomy habitat (present participle of obfusco used as adjective). Range and ecology Unlike most Ceriagrion species, the varians -group prefers rainforest shade. The new species favours deeply shaded standing water with thick detritus between 350 and 440 m a.s.l., often blackwater, probably mostly temporary (e.g., flooded by river water) and typically on sand, e.g., in Gabon known only from the Batéké Plateau (Photo 26). It can be the most abundant odonate in dark flooded forest in the Congo Basin (Photo 39). Conspicuously orange when fresh, adults darken and become increasingly inconspicuous with age.Published as part of Dijkstra, Klaas-Douwe B., Kipping, Jens & Mézière, Nicolas, 2015, Sixty new dragonfly and damselfly species from Africa (Odonata), pp. 447-678 in Odonatologica 44 (4) on pages 515-518, DOI: 10.5281/zenodo.3538
Neodythemis katanga Dijkstra & Kipping, sp. nov.
No full textNeodythemis katanga Dijkstra & Kipping sp. nov. – Katanga Junglewatcher (Type Photo 49, Photos 63–64, Fig. 30) Taxonomy Dijkstra & Vick (2006) illustrated this as » N. preussi Katanga «. Genetically and morphologically very close to N.preussi, the taxon is probably its southern counterpart, but differs in sufficient detail to be described as a new species, and treated as such by Dijkstra & Clausnitzer (2014). Material studied Holotype ♂ . RMNH.INS.505522, Congo-Kinshasa, Katanga, Upemba National Park, Lusinga valley 3 km E of park headquarters (Photo 64), stream with patches of gallery and swamp forest, open swamp and arable fields, 1570 – 1590 m a.s.l. (8.93 ° S 27.23 ° E), 13 -xi- 2011, leg. K.-D.B. Dijkstra, RMNH. Further material. CONGO-KINSHASA (Katanga): 5 ♂ (RMNH.INS.505456), 1 ♀ (RMNH.INS.505459), Upemba National Park, source area of Lusinga near park headquarters, spring streams in gallery forest and adjacent bog, dam and channel, 1760 – 1800 m a.s.l. (8.93 ° S 27.23 ° E), 11–15 - xi- 2011, leg. K.-D.B. Dijkstra, RMNH. 1 ♂, Kapanga, v- 1933, leg. G.F. Overlaet, MRAC. 2 ♀, Kabinda, xii- 1952, leg. Ch. Seydel, MRAC. 2 ♂ 2 ♀, Kabongo, xii- 1952, Ch. Seydel, MRAC. 1 ♂, Lulua, Kapelekese Riv., 1933, leg. G.F. Overlaet, MRAC. ZAMBIA (Northwestern Province): 1 ♂ 1 ♀, Sakeji Mission School, E of Ikelenge, seepages and spring brook in dense gallery forest, 1390 m a.s.l. (11.2320 ° S 24.3093 ° E), 24 -xi- 2014, leg. J. Kipping, CJKL. Genetics One unique haplotype (n = 3) nearest to six of N. preussi (n = 10). Male morphological diagnosis Similar to N. preussi by (a) fairly small size, Hw 26.0–28.0 mm (n= 8); (b)the largely yellow labium; (c) the broad and complete pale ante-humeral stripes; (d) 14–15 Ax in Fw; (e) Fw discoidal field of 1 cell-row both at and distal to the node, 2–3 cells wide on wing border; (f) 0 cross-veins in Fw triangle and 0–1 in Hw; (g) 1 Cux in Fw and 2 in Hw; (h) 3–4 cells in Hw anal loop; (i)the hook of hamule raised and thus visible in lateral view; and (j) the thickened apex of cerci (Fig. 30). However, has (1) a narrow black stripe running through the metastigma towards the middle leg; (2) the metepimeron posteriorly only rarely black (Fig. 30); (3) the pale spots of S 7 merged across the dorsal carina; and (4) cerci with a more slender apex and less pronounced ventral angle, which the tip of the epiproct surpasses clearly (Fig. 30). Etymology Named after Katanga province where the species was discovered (noun in apposition). Range and ecology Confused with N. preussi that it seems to replace south of the central African rainforests, occurring at greater elevation between about 900 and 1 800 m a.s.l. at forested spring areas surrounded by grass- or woodland in Katanga and northern Zambia (Map 10).Published as part of Dijkstra, Klaas-Douwe B., Kipping, Jens & Mézière, Nicolas, 2015, Sixty new dragonfly and damselfly species from Africa (Odonata), pp. 447-678 in Odonatologica 44 (4) on pages 629-630, DOI: 10.5281/zenodo.3538
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