Research Article |
Corresponding author: Robert Tropek ( robert.tropek@gmail.com ) Academic editor: Rodolphe Rougerie
© 2020 Peter Ustjuzhanin, Vasily Kovtunovich, Vincent Maicher, Szabolcs Sáfián, Sylvain Delabye, Alexander Streltzov, Robert Tropek.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Ustjuzhanin P, Kovtunovich V, Maicher V, Sáfián S, Delabye S, Streltzov A, Tropek R (2020) Even hotter hotspot: description of seven new species of many-plumed moths (Lepidoptera, Alucitidae) from Mount Cameroon. ZooKeys 935: 103-119. https://doi.org/10.3897/zookeys.935.49843
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Mount Cameroon, SW Cameroon, has already been described as a unique hotspot of the many-plumed moth (Lepidoptera, Alucitidae), with their local diversity unrivalled in the entire Afrotropics. We confirm its importance with description of seven new species: Alucita bakweri Ustjuzhanin & Kovtunovich, sp. nov., Alucita jana Ustjuzhanin & Kovtunovich, sp. nov., Alucita bakingili Ustjuzhanin & Kovtunovich, sp. nov., Alucita tatjana Ustjuzhanin & Kovtunovich, sp. nov., Alucita zuza Ustjuzhanin & Kovtunovich, sp. nov., Alucita deja Ustjuzhanin & Kovtunovich, sp. nov., and Alucita bokwango Ustjuzhanin & Kovtunovich, sp. nov. These descriptions have raised the known local diversity of many-plumed moth species on Mount Cameroon to 22, i.e., over a quarter of the known Afrotropical biodiversity of this group. This study also emphasises the great conservation importance of the area.
Alucita, Afrotropics, biodiversity, endemic, insects, microlepidoptera, taxonomy, tropical rainforest
Mount Cameroon has recently been recognised as a unique biodiversity hotspot for many-plumed moths (Lepidoptera, Alucitidae) (
In this study, we report on a second part of the material sampled during our long-term study of lepidopteran diversity in rainforests of Mount Cameroon (e.g.,
CUK personal collections of P. Ustjuzhanin and V. Kovtunovich, Novosibirsk and Moscow, Russia.
All specimens were collected in eight rainforest localities on the south-western and southern slopes of Mount Cameroon at elevations ranging from 350 to 2200 m a.s.l. between November 2014 and October 2017 (Fig.
Genitalia of most specimens were dissected and examined. For their dissection and preparation of permanent slides, we followed a protocol described in
All sampling localities (Fig.
Bamboo Camp. Bamboo Camp (350 m a.s.l.), Mount Cameroon (SW slope), 4.0879°N, 9.0505°E; a lowland rainforest with historical disturbances from selective logging.
*Crater Lake. Crater Lake camp (1450 m a.s.l.), Mount Cameroon (SW slope), 4.1443°N, 9.0717°E; a submontane rainforest locally disturbed by forest elephants.
Drink Gari. Drink Gari camp (650 m a.s.l.; also known as “Drinking Gari”), Mount Cameroon (SW slope), 4.1014°N, 9.0610°E; a lowland rainforest with canopy layer presumed to be closed.
*Ekonjo. Ekonjo camp (1150 m a.s.l.), Mount Cameroon (S slope), 4.0881°N, 9.1168°E; an upland closed-canopy rainforest.
Elephant Camp. Elephant Camp (1850 m a.s.l.), Mount Cameroon (SW slope), 4.1170°N, 9.0729°E; a montane forest with a sparse canopy layer as a consequence of natural disturbances by forest elephants.
*Mann’s Spring. Mann’s Spring camp (2200 m a.s.l.), Mount Cameroon (SW slope), 4.1428°N, 9.1225°E; a montane forest at the natural timberline.
*Mapanja. Mapanja camp (1850 m a.s.l.), Mount Cameroon (S slope), 4.1157°N, 9.1315°E; a montane forest with canopy layer presumed to be closed.
PlanteCam. PlanteCam camp (1100 m a.s.l.; also misspelled as “Planticamp”), Mount Cameroon (SW slope), 4.1175°N, 9.0709°E; an upland rainforest in the transition between the lowland and montane zones, with a sparse canopy layer as a consequence of natural disturbances by forest elephants.
Holotype
• 1 male, (
In the yellowish colour of its wings, this species resembles Alucita ferruginea Walsingham, 1881, Alucita balioxantha (Meyrick, 1921), and Alucita compsoxantha (Meyrick, 1924), from which it differs in the structure of male genitalia. Genitalia of the new species differ from A. balioxantha by a thin sharp gnathos, prolonged saccus, and short, wide and wing-like valvae (Fig.
Wingspan 18 mm. Head with white scales, thorax and tegulae yellowish-brown. Labial palpus yellow, thin, straight, twice as long as longitudinal eye diameter. Third segment discrete, directed forward, median part framed by brown lines, apically pale and sharp. Antenna white, basally thickened. Wings yellowish-brown, with four white transverse lines. Wings basally darkened with brown scales. Abdomen yellowish-brown. Hind leg pale yellow.
Uncus long, distally widened, apically with triangle notch. Gnathos narrow, apically tapered, in length equal to uncus. Gnathos arms short, thick, smoothly bent inwards. Valves short, wide, wing-shaped, apically with bundle of fine acicular setae. Anellus arms wide, short. Saccus elongated, narrow triangular. Aedeagus almost straight, with an elongated uncinate cornutus in middle, groups of fine acicular cornuti distally, and narrow sharp cornuti sticking out apically.
Cameroon.
December.
We name the species after the Bakweri people, the main ethnic group of the Mount Cameroon region. Without the priceless assistance of numerous local people our project would not be possible. We hope such dedication will encourage protection of the species’ habitats.
Holotype
• male, (
The new species is similar in the shape of the uncus and valves of the male genitalia to Alucita tesserata (Meyrick, 1918) (Fig.
Wingspan 15 mm. Head, thorax and tegulae with brown appressed scales. Labial palpus wide, short, 1.5 longer than longitudinal eye diameter, slightly bent upwards, brown scaled inside and outside. Third segment discrete, apically sharp. Antenna yellowish-brown. Wings yellowish-brown, distinctive pale brown band medially. Forewings show a dark brown postmedial band. Forewing basally with dark brown scales, hindwing basally light. Distally, alternating portions of brown and yellowish scales. Fringe of wings yellow, with alternating portions of brown hairs. Hind leg pale yellow.
Uncus long, apically slightly widened. Gnathos long, distally widened, apically slightly tapered, equal to uncus in length. Valve short, finger-like, membranous. Anellus arms narrow, long, apically slightly widened. Saccus with oval outer edge. Aedeagus straight, basally widened, apically with a group of fine acicular cornuti.
Cameroon.
April, October.
The species name is a noun in apposition in honour to Robert Tropek’s mother, Jana Tropková.
Holotype
• male (
The new species resembles Alucita fokami Ustjuzhanin & Kovtunovich, 2018 in external appearance but it substantially differs in both male and female genitalia (for genitalia of A. fokami, see
Wingspan 12–15 mm, holotype 12 mm. Head, thorax and tegulae with dark grey scales and an admixture of white scales. Labial palpus grey outside, white inside, 1.5 times longer than longitudinal eye diameter, directed forward. Third segment short, apically slightly sharpened. Antenna pale grey, distinct dark elongated spot basally just beyond scape. Wings mottled, yellowish-grey, medially with a poorly expressed yellowish-brown band. Alternating portions of grey and white scales shaped as elongated strokes, spots and points on lobe of all wings. Fringe with alternating portions of grey and white hairs. Hind leg pale yellow.
Uncus short, straight, slightly widened apically. Gnathos wide, sharply narrowing apically, a little longer than uncus. Valve short, narrow triangular, membranous. Sacculus with membranous process containing a large sclerotized uncinate process in lower part. Anellus arms very long, basally wide, medially narrowing, apically widened and slightly bent. Saccus with oval outer edge. Aedeagus long, straight, with two robust cornute in this medial part.
Papilla analis narrow, elongated. Posterior apophyses thin, straight. Anterior apophyses also thin, straight, equal in length to posterior apophyses. Lamina postvaginalis sclerotized, wide, rectangular, with blunt angular lateral projections. Antrum corrugated, wide, short. Ductus wide, medially swollen. Ductus seminalis short, well expressed. Bursa copulatrix small, oval, with robust elongated comb-shaped signum located basally and reaching base of ductus seminalis.
Cameroon.
December to February.
The species is named after Bakingili, a village at the southern foothills of Mount Cameroon, in which area it was collected. Numerous people from the village helped our project as field assistants and by many other ways, and therefore the community was crucial for its success. The Bakingili people are also necessary for protection of the species’ natural area.
Holotype
• female, (
The new species resembles Alucita mischenini Ustjuzhanin & Kovtunovich, 2018 in the light colour of its wings and the wide medial band, but it differs in its larger size (21 mm vs. 12–15 mm wingspan). Additionally, the position and shape of dark markings in the basal and distal portions of the wings differentiates A. tatjana from A. mischenini whose forewings bear extensive brown areas in in the basal portions and almost continuous dark brown marks covering the distal halves of the first two forewing lobes (
Wingspan 21 mm. Head, thorax and tegulae with appressed white scales. Labial palpus twice as long as longitudinal eye diameter, white, with a brown band of the third segment, thin, apically tapered, sharp. Antenna white. Scape extended and flattened. Wings white with well-expressed wide median band, brown on forewing and almost black on hindwing. Subterminal band narrower, consisting of brown spots of scales, intermittently traced throughout all lobes. First forewing lobe apically brown. Second forewing lobe with brown colouration continuous between median band and subterminal band. Forewing basally white with well-expressed dark brown fringes near the base of the cleft between the second and third lobes. Hindwing basally white with scattered dark brown scales and a prominent dark brown marking across base of second to sixth lobes. Hind leg pale yellow (although not so apparent in Fig.
Papilla analis narrow, elongated. Posterior and anterior apophyses thick, straight. Anterior apophyses equal in length to posterior apophyses. Antrum wide, goblet-like. Ductus short, expanded in median part around junction with ductus seminalis, and corrugated at junction with bursa copulatrix. Bursa copulatrix small, oval, without signa.
Cameroon.
April, October.
The species is a noun in apposition in honour to Petr Ustjuzhanin’s sister, Tatjana Ustjuzhanina.
Holotype
• 1 male, (
In its male genitalia, the new species shares the elongated saccus and absence of valves with A. fokami (illustrated in
Wingspan 12 mm. Head white, with two brown spots between antennae. Thorax and tegulae white. Labial palpus straight, 1.5 times as long as longitudinal eye diameter, with alternating white and dark bands on each segment. Third segment short, not tapered apically. Antenna yellow, with small dark brown spots basally, just above scape. Wings mottled in their dark parts. Forewing darker than hindwing, with predominance of dark brown spots and strokes, while these spots and strokes are less expressed on the hindwing, with predominance of pale-yellow portions. Wings basally white, although locally darkened with dark brown scales. Fringe with alternating portions of light and brown hairs. Hind leg pale yellow.
Uncus straight, finger-like, of even width. Gnathos and its arms wide, short. Valves absent. Anellus arms short, narrow, arched, apically sharp. Saccus very long, narrow, elongated, slightly expanded medially. Aedeagus straight, medially with two small, spinous cornuti (not apparent on Fig.
Cameroon.
November till February, April.
The species name is a noun in apposition. It was named in honour of the ichthyologist Zuzana Musilová, Robert Tropek’s wife.
Holotype
• male (
Alucita deja differs from other Alucita species by the distinctive white mirrors on its abdomen. The new species’ male genitalia are similar to A. janeceki Ustjuzhanin & Kovtunovich, 2018 in the absence of valves and the shape of the saccus (illustrated in
Female wingspan 15 mm, male wingspan 13 mm. Head with pure-white appressed scales. Thorax and tegulae also pure white anteriorly, sharply contrasting with dark brown posterior portions. Labial palpus short, 1.5 times as long as longitudinal eye diameter. Third segment short, not tapered apically. Antenna brown. Scape pure white. Wings and fringes dark brown. First lobe of forewing with white band around 1/3, narrow white band around 3/5 and yellowish-brown band edged with white around 4/5. Several irregular fine white cross-lines across all other lobes and fringes of both wings. Hind leg yellowish-brown. Fourth, sixth and last tergites of abdomen with mirrors of pure-white scales. Abdomen completely pure-white ventrally.
Uncus straight, long, of even width. Gnathos short, wide, apically expanded. Valves not developed. Anellus arms straight, apically sharp. Saccus shaped as elongated oval, with small notch at apex. Aedeagus robust, slightly shorter than entire genital structure, with jagged acicular cornuti from its medial part to apex.
Papilla analis narrow, elongated. Posterior apophyses thin, straight, shorter than anterior apophyses. Antrum wide, sclerotized, shaped as truncated tube with extended ostium. Outer edge of ostium jagged. Ductus wide and corrugated at its confluence to antrum and bursa copulatrix. Ductus seminalis short, bag-like, membranous, departing from confluence of ductus to antrum. Bursa copulatrix of irregular oval shape with elongated protrusion at apex.
Cameroon.
April, December.
The species name is a noun in apposition in honour of the limnologist and cyanobacteria specialist, Andreja Kust, a dear soulmate of Vincent Maicher.
Holotype
• male (
The new species resembles Alucita chloracta (Meyrick, 1908) in its external characters and the structure of the male genitalia. Genitalia of A. bokwango differs from A. chloracta in the needle-like apex of the uncus and the oval apical expansions of the valvae, whilst the uncus of A. chloracta is noticeably widened apically with a notch and valvae have a rounded apex. In its female genitalia, A. bokwango differs from A. chloracta (Fig.
Wingspan 23–25 mm. Head, thorax, tegulae and abdomen all dark brown. Labial palpus yellowish-brown, three times as long as longitudinal eye diameter, directed forward. Third segment thin, apically tapered. Antenna pale brown, with small dark brown spots basally, just above scape. Wings brown, outer edge slightly lighter. Medial band on all wings whitish, almost transparent, interspersed with brown portions of hairs on lobes fringe. Hind leg yellow.
Uncus thin, long, needle-shaped. Gnathos equal to uncus in length, apically sharp. Valves long, membranous, smoothly forming an oval apically. Anellus arms straight, narrow, equal to gnathos in their length. Saccus oval. Aedeagus robust, thick, almost equal in length to genital structure without uncus, two spinous cornuti distally.
Papilla analis oval, wide throughout length. Posterior apophyses slightly shorter than anterior, thick and slightly undulated. Antrum wide, funnel-like. Ductus short, thin, membranous. Bursa copulatrix large, oval, with two large, lanceolate signa (although not clearly apparent in Fig.
Cameroon.
October-May
The species is named after Bokwango, a village on the eastern slope of Mount Cameroon where our project established its main base and where we made a lot of good friends. Many of the species records were also made in forests belonging to the village. Last but not least, most of our field assistants and other helpers came from Bokwango and we are thankful to all of them for the success of the project. We strongly believe this dedication will also help protect the unique biodiversity of the region.
18 specimens from Elephant Camp, 19–24.XI.2014, and two specimens from PlanteCam, 11–18.XII.2014, (all lgt. V. Maicher, Sz. Sáfián, Š. Janeček, R. Tropek), were erroneously indicated as A. chloracta by
Comparative illustrations of other Alucita species mentioned in the new species’ diagnoses 19 A. balioxantha (Meyrick, 1921), type, male genitalia 20 A. tesserata (Meyrick, 1918), type, male genitalia 21 A. rhaptica (Meyrick, 1920), female genitalia 22 A. compsoxantha (Meyrick, 1924), type, female genitalia 23 A. chloracta (Meyrick, 1908), type, adult female 24 A. chloracta, type, female genitalia.
With the seven newly described Alucita species, the known diversity of many-plumed moths on Mount Cameroon has been increased to 22 species (Table
Summary of all specimens of Alucita moths sampled on Mount Cameroon in this study and by
Sampling locality | Altitude | A. acalyptra | A. bakingili | A. bakweri | A. besongi | A. bokwango | A. chloracta | A. coffeina | A. deja | A. escobari | A. fokami | A. jana | A. janeceki | A. lidiya | A. longipenis | A. ludmila | A. megaphimus | A. mischenini | A. olga | A. spicifera | A. tatjana | A. zinovievi | A. zuza |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bimbia-Bonadikombo | 30 m | 1 | |||||||||||||||||||||
Bamboo Camp | 350 m | 1 | 3 | 3 | 7 | 1 | 2 | 2 | 2 | 1 | 2 | 6 | 4 | ||||||||||
Drink Gari | 650 m | 1 | 1 | 1 | 1 | 1 | 3 | 3 | |||||||||||||||
PlanteCam | 1100 m | 1 | 1 | 3 | 3 | 1 | 2 | 2 | 1 | 1 | 2 | 1 | 1 | 5 | 2 | 1 | 1 | 1 | 1 | 1 | |||
Ekonjo | 1150 m | 1 | 1 | ||||||||||||||||||||
Crater Lake | 1450 m | 2 | |||||||||||||||||||||
Elephant Camp | 1850 m | 27 | 7 | 7 | |||||||||||||||||||
Mapanja | 1850 m | 11 | 1 | ||||||||||||||||||||
Mann’s Spring | 2200 m | 1 |
Mount Cameroon is known to harbour high diversity in many groups, including Lepidoptera (e.g.,
We are indebted to Francis E. Luma, Štěpán Janeček, Pavel Potocký, Jan E.J. Mertens, Jennifer T. Kimbeng, Mercy Murkwe, Ismeal N. Kobe, Congo S. Kulu, and several other assistants for their help in the field; Eric B. Fokam for help with permits and other priceless support; the MCNP staff for all their assistance; Sergey Reshetnikov (Novosibirsk, Russia) for photographs of adult specimens; and Donald Hobern for his constructive comments to the earlier manuscript draft. This study was performed under several authorisations from the Ministries of the Republic of Cameroon for Forestry and Wildlife, and for Research and Innovations. Our project was funded (through RT, VM and SD) by the Czech Science Foundation (16-11164Y), the Charles University (PRIMUS/17/SCI/8 and UNCE204069), and the University of South Bohemia (GAJU030/2016/P and 152/2016/P). The authors have declared that no competing interests exist.