Despax, R. (1940). Bulletin de la Société d’Histoire Naturelle de Toulouse, 75:296.
Vinçon, G. (1996). Bulletin de la Société Entomologique Suisse , 69:72
Dictyogenus fontium
Two New Species Of Dictyogenus Klapálek, 1904 (Plecoptera: Perlodidae) From The Jura Mountains Of France And Switzerland, And From The French Vercors And Chartreuse Massifs
Reding, Jean-Paul G.
Launay, Bertrand
Doaré, Jacques Le
Ruffoni, Alexandre
Vinçon, Gilles
Illiesia
2019
15
2
27
64
8N8LS
2603979
Vincon, Launay, Le Doare, Ruffoni & Reding
Vincon, Launay, Le Doare, Ruffoni & Reding
2019
Insecta
Perlodidae
Dictyogenus
Animalia
Plecoptera
13
40
Arthropoda
species
muranyii
sp. nov.
http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org: TaxonName:506376 ( Figs. 27–51) Dictyogenus fontium– Despax, R. (1940). Bulletin de la Société d’Histoire Naturelle de Toulouse, 75:296. Dictyogenus fontium– Vinçon, G. (1996). Bulletin de la Société Entomologique Suisse, 69:72.
Dictyogenus fontiumgr sp 3-GV sensuGilles Vinçon (early-release DNA sequence on: www.boldsystems.org, unpublished)
Materials examined. Holotypemale: FRANCE, Vercors Massif, Isèredepartment (38), Karstic Spring of Bruyantriver, above Engins, Lans-en- Vercors(38250), 45° 8.798123'N, 5° 37.049358'E, 982ma.s.l., 09.06.2017, leg. G. Vinçon, deposited in the MZL(catalogue number: GBIFCH00652534). Paratypes:same locality, same date, 3♂, 1♀, leg. G. Vinçon, deposited in the MZL(catalogue number: GBIFCH00652525, GBIFCH00652519); same locality, same date, 3L, leg. J.-P.G. Reding, deposited in the MZL(catalogue number: GBIFCH00652514). Additional specimens. We examined many other specimens. These are stored in the collections of Bertrand Launay ( BLC), Gilles Vinçon ( GVC), Jean-Paul G. Reding ( RC), Dávid Murányi ( MC), Fig. 31. Dictyogenus muranyii sp. n., male, hindwing. Karstic spring of Bruyant, Isère dpt, France. Photo B. Launay. Jacques Le Doaré ( JLDC), Alexandre Ruffoni ( ARC) and MZL. FRANCE Vercors Massif Drôme department (26): Archiane torrent, Drôme tributary, NE Châtillon-en-Diois, Menée, Cirque d’Archiane, 44° 44.770828'N, 5° 30.214097'E, 760m, 31.07.1990, 1♂; 16.09.1990, 2♀(leg. G. Vinçon; GVC). Springat Brudour cave, Brudour River, Bournetributary, Bouvante(26190), 44° 55.67493'N, 5° 19.257459'E, 1182m, 13.04.2016, 3L; 02.06.2016, 2♂, 2♀, 1L, 7E (leg. B. Launay; BLC; used for molecular studies by IRSTEA, numbers B079 and B080); 21.05.2017, 1E (leg. G. Vinçon; GVC); 09.06.2017, 9E (leg. J.-P.G. Reding; RC). Adouin river, near its spring, Vernaisonand Bournetributary, Tourtre, Saint-Martin-en- Vercors(26420), 45° 0.120928'N, 5° 27.550379'E, 793m, 21.05.2017, 1♂, 1♀(leg. G. Vinçon, GVC); 09.06.2017, 11♀, 1E (leg. G. Vinçon; RC; 1♀used for molecular studies by SwissBOL, MZL, catalogue number GBIFCH00280854); 2♂, 17♀(leg. G. Vinçon; GVC). Cholet river, Lyonneand Bournetributary, Combe Laval, Saint-Laurent-en-Royans (26190), 44° 59.859883'N, 5° 20.75296'E, 355m, 21.05.2017, 2♂, 6E (leg. G. Vinçon; GVC). Isère department (38): Bruyant river, Furon and Isère tributary, above Engins, Lans-en-Vercors (38250), 45° 8.798123'N, 5° 37.049358'E, 982m, 06.10.1991, 1E; 25.06.1995, 7♂, 4♀; 10.05.1998, 1♂; 10.06.2007, 1♂; 22.06.2008, 1♂; 22.06.2009, 32♂, 6♀( 1♂used for molecular studies by A. Reding); 07.07.2012, 7♂, 2♀, 1L (leg. G. Vinçon; GVC); 07.06.2015, 3♂, 2♀, 6L, 5E (leg. B. Launay; BLC); 09.06.2017, 2♂, 1♀, 17E (leg. G. Vinçon; GVC); 7♂, 1♀, 7L, 3E (leg. J.-P.G. Reding; RC; 1♂used for molecular studies by SwissBOL, MZL, catalogue number GBIFCH00280811). Cuves de Sassenagestrong rheocrene spring, Germebrook, Furonand Isèretributary, Sassenage(38474), 45° 12.516243'N, 5° 39.078175'E, 330m, 15.06.1991, 1♂, 2♀strongly brachypterous (leg. G. Vinçon; MC). Drevenne river, Isère tributary, Pont Chabert, Saint-Gervais (38470), 45° 10.643943'N, 5° 29.885486'E, 885m, 15.06.1991, 1L (leg. G. Vinçon; GVC); 31.05.2012, 2♂; 17.07.2012, 2L; 11.07.2015, 3L (leg. J. Le Doaré; JLDC); 06.06.2015, 1E (leg. B. Launay; BLC). Font Noire river, Bournetributary, Villard-de- Lans(38250), 45° 4.472474'N, 5° 33.970966'E, 1010m, 01.06.2016, 1♂, 1E (leg. B. Launay; BLC; used for molecular studies by IRSTEA, number B120). Fauge river, Bournetributary, Villard-de-Lans(38250), 45° 3.373805'N, 5° 34.664105'E, 1230m, 01.06.2016, 1E (leg. B. Launay; BLC). Figs. 32-35. Dictyogenus muranyii sp. n., male terminalia. 32.Hemitergal lobes, dorsal view. Karstic spring of Font Noire, Isère dpt, France. Photo B. Launay. 33.Epiproct, lateral view. Karstic spring of Font Noire, Isère dpt, France. Photo B. Launay. 34.Lateral stylet, lateral view. Karstic spring of Brudour, Drôme dpt, France. Photo B. Launay. 35.Epiproct, dorso-caudal view. Karstic spring of Font Noire, Isère dpt, France. Photo B. Launay. Fig. 36. Dictyogenus muranyii sp. n., female, subgenital plate. Karstic spring of Brudour, Drôme dpt, France. Photo B. Launay. Spring of Furonriver, Lans-en-Vercors(38250), 45° 6.304551'N, 5° 36.221224'E, 1294m, 12.07.2015, 6L (leg. J. Le Doaré; JLDC). Chartreuse Massif Isère (38) and Savoie (73) departments: Sarcenas river at Sarcenas, Isère tributary, (38700), 45° 16.829887'N, 5° 45.251584'E, 1093m, 20.04.1986, 5L; 01.06.1986, 4L; 05.10.1986, 1♂(leg. G. Vinçon; GVC). Spring of Guiers-Vif river, Rhône tributary, Cirque de Saint-Même, Saint-Pierre-D’Entremont (73670), 45° 23.491629'N, 5° 53.464859'E, 1050m, 21.06.1992, 3♀; 12.09.1992, 4♀, 1E; 21.06.1992, 3♀(leg. G. Vinçon; GVC). Karstic spring of Guiers Mort, Rhône tributary, Saint-Pierre-de-Chartreuse (38380), 45° 19.571976'N, 5° 51.452039'E, 1360m, 11.09.1938, stage and numbers not specified (leg. Ms. Daudin, fide Despax 1940).
Diagnosis.General color dark brown with tawny and yellow spots ( Figs. 27, 28). Males and females macropterous; only two femaleswere found strongly brachypterous. Apex of the frontal sclerite of the epiproct of adult males very slightly turned downwards, in lateral view ( Fig. 33). Female subgenital plate covering half of the abdominal sternum 9 ( Fig. 36). Body length of males 17.2 to 20.9 mm; females 18 to 23.6 mm. Anterior wings of males 15 to 19.3 mm; females 17.7 to 21.5 mm. Posterior wings of males 12.5 to 15.8 mm; females 15.3 to 17.4 mm.
Adults ( Figs. 27–36).Upper side of the head brown, with large yellow spots ( Fig. 28). M-line yellow, not interrupted in its middle ( Fig. 28). Between the lateral ocelli, a large, ovoid, yellow area delimitated posteriorly by the epicranial suture ( Fig. 28). Presence of a large, yellow, median band extending from the anterior margin of the pronotum to its posterior margin ( Fig. 28). Band slightly constricted in the middle and then steadily widening toward the posterior margin ( Fig. 28). A tawny area on each side of the pronotum, with dark, sculpted rugosities ( Fig. 28). Anterior and posterior angles of pronotum almost rectangular ( Fig. 28). Abdominal sterna 1 to 6 pale yellow, with two dark patches. Antennae dark brown; cerci light brown with basal part pale yellow ( Figs. 29, 30). Wing venation as typical for the genus ( Fig. 31; cf. Fig. 8). Forewing with the two cross-veins “ra- rp” and “rp- ma” Fig. 37. Dictyogenus muranyii sp. n., larva. Karstic spring of Brudour, Drôme dpt, France. Photo A. Ruffoni. nearly aligned (like in Fig. 8). Numerous crossveins forming a reticulated area between RA and RP ( Fig. 31; cf. Fig. 8). Cross-vein “ra- rp” and subcostal area faintly infuscate (as in Fig. 8). Male terminalia ( Figs. 29, 30, 32–35).Epiproct flanked by flat and spatulate lateral stylets ( Figs. 33, 34). Abdominal tergum 10 divided into hemiterga whose lobes are covered with a bunch of 20 to 25 long setae in which 3 to 6 stronger and longer spines (half of the length of the hemitergal lobes) are embedded ( Figs. 29, 32). Hemitergal lobes bulb-shaped with a slight distal knob ( Fig. 30), both pointing rearwards ( Fig. 30) and almost horizontally toward each other ( Figs. 29, 32). Apex of frontal sclerite of epiproct slightly turned downwards, in lateral view ( Fig. 33). Lateral stylets long, only slightly enlarged at apex, in lateral view ( Figs. 33, 34). Abdominal sternum 7 composed of multiple plates (as in Figs. 7, 59, 82). Females ( Fig. 36).Females not formally identifiable to species level. Female subgenital plate ( Fig. 36) covering at most half of sternum 9. Its general shape is semi-circular with a shallow Vshaped median notch. Mature larvae ( Figs. 37–45).Interocellar area with a narrow yellow patch nearly reaching lateral ocelli ( Figs. 37–39). Lateral ocelli with small lateral circum-ocellar yellow patch ( Fig. 38). A large, elliptical yellow patch above each lateral ocellus ( Figs. 37–39). M-line well visible only in its medial, crescent-shaped, section ( Figs. 37–39). Pronotum wider than long ( Figs. 38, 39). Medio-dorsal setae on pronotum long, but not compacted, sometimes covering only the posterior half of the pronotum ( Figs. 40, 41). Medio-dorsal row of setae present on mesonotum and metanotum ( Fig. 40). Abdominal terga with a row of short and sparse medio-dorsal setae ( Fig. 42). Paragenital plates, in ventral view, without spines, or with only 1 spine on one of the paragenital plates, but with numerous empty spine insertion points ( Fig. 44). Medio-dorsal row of swimming-hairs of caudal setae sparse, slightly longer than the diameter of the cerci ( Fig. 43). General aspect as in Fig. 37. Egg characteristics ( Figs. 46–51).General shape triangular or trilateral in cross section. Posterior pole of egg regularly rounded; ridges protruding ( Figs. 46, 47). Chorionic surface spring of Brudour, Drôme dpt, France. Photo B. Launay. 43.Medio-dorsal setae on cerci. Karstic spring of Brudour, Drôme dpt, France. Photo A. Ruffoni. 44.Paragenital plates, ventral view. Karstic spring of Brudour, Drôme dpt, France. Photo B. Launay. 45.Stipe. Karstic spring of Brudour, Drôme dpt, France. Photo B. Launay. Figs. 38-45. Dictyogenus muranyii sp. n., larva. 38.Head, pronotum and mesonotum, dorsal view. Karstic spring of Brudour, Drôme dpt, France. Photo B. Launay. 39.Head, pronotum, dorsal view. Karstic spring of Brudour, Drôme dpt, France. Photo A. Ruffoni. 40.Head, pronotum, mesonotum and metanotum, lateral view. Karstic spring of Bruyant, Isère dpt, France. Photo A. Ruffoni. 41.Pronotum, lateral view. Karstic spring of Bruyant, Isère dpt, France. Photo J.-P.G. Reding. 42.Abdominal segments, lateral view. Karstic Figs. 46-51. Dictyogenus muranyii sp. n., egg characteristics. 46.Egg, upper view from one ridge with two faces and the micropylar region visible. Bruyant, Vercors Massif, Isère dpt, France. 47.Entire egg. Archiane, Vercors Massif, Isère dpt, France. 48.Egg collar. Archiane, Vercors Massif, Isère dpt, France. 49.Egg collar. Bruyant, Vercors Massif, Isère dpt, France. 50.Detail of micropyles. Bruyant, Vercors Massif, Isère dpt, France. 51.Detail of chorion and micropyles. Archiane, Vercors Massif, Isère dpt, France. Figs. 52-53. Dictyogenus muranyii sp. n., biotopes. 52.Cave and Spring of Brudour river, Drôme dpt, France. Photo A. Ruffoni. 53.Spring of Adouin River, Vercors Massif, Isère dpt, France, in summer. Photo J. Le Doaré. with polygonal follicle cell impressions ( Figs. 48, 50, 51). Anchor papillate, donut shaped apically with central depression ( Figs. 48, 49). Micropyles not protruding and arranged regularly in a line in the middle of the egg ( Figs. 47, 50). Eclosion line absent ( Figs. 46, 47). Comparison to Congeners. Adults.In the adult male of Dictyogenus muranyii sp. n., a wide, V-shaped membranous area between the hemitergal lobe and the inner anterior corner of the hemitergum is present ( Figs. 29, 32), whereas this area is sclerotized and much narrower in D. alpinum( Fig. 56). The lateral stylets in D. muranyii sp. n.are slightly enlarged apically ( Figs. 33, 34), intermediate in form between those of D. alpinum( Fig. 57) and those of the D. fontiumspecies complex ( Fig. 80). In the adult female of D. muranyii sp. n., the subgenital plate ( Fig. 36) covers at most the upper half of sternum 9, as is also the case for specimens of the D. fontiumspecies complex ( Figs. 83, 84), whereas the subgenital plate of D. alpinumcovers ¾ of sternum 9 ( Figs. 60, 61). The anterior and posterior angles of the pronotum of Dictyogenus muranyii sp. n., D. jurassicum sp. n.and D. fontiumarealmost rectangular ( Figs. 2, 28, 79), whereas those of D. alpinumare rounded ( Fig. 54). Adult males and females of Dictyogenus muranyii sp. n.hence have more affinities with those of the D. fontiumspecies complex than with those of D. alpinum. Mature larvae. Dictyogenus muranyii sp. n.differs from D. fontiumby the presence of medio-dorsal setae on the pronotum ( Fig. 41compared to Fig. 86). Medio-dorsal setae on pronotum are long and sparse in D. muranyii sp. n.( Figs. 40, 41), whereas they are long and dense in D. alpinum( Fig. 71), and short and scattered, arranged as two loosely demarcated rows in D. jurassicum sp. n.( Fig. 13).
Distribution and ecology. Dictyogenus muranyii sp. n.inhabits karstic springs (some of them intermittent; Fig. 52) in the French Vercors and Chartreuse massifs ( Fig. 92). The localities occurring on the south western part of the Vercors Massif belong to the Drôme watershed (main Rhône tributary); those occurring on the northern and eastern part of the Vercors Massif, and on the southern part of the Chartreuse Massif belong to the Isère watershed (main Rhône tributary), and those occurring on the western Figs. 54-55. Dictyogenus alpinum, male. 54.Head and pronotum. Vorz River, Isère dpt, France. Photo B. Launay. 55.Hemitergal lobes, lateral view. Vorz River, Isère dpt, France. Photo B. Launay. Fig. 56. Dictyogenus alpinum, male, hemitergal lobes, dorsal view. Nant Bénin River, Savoie dpt, France. Photo B. Launay. Fig. 57. Dictyogenus alpinum, male, epiproct, lateral view. Nant Bénin River, Savoie dpt, France. Photo B. Launay. part of the Chartreuse Massif belong to the Guiers watershed (Rhône tributary). The life cycle of Dictyogenus muranyii sp. n.is probably similar to the one of D. jurassicum sp. n.The main emergence period of adults is in May and June, although isolated specimens occur until September. We have noted on one occasion a spectacular upstream flight of females in mid-June on the river Adouin ( Fig. 53). Some of the females were ovipositing under large stones right at the spring head. Mature larvae emerge preferentially on small islets located in the middle of the river.
Etymology of Dictyogenus muranyii sp. n.This species is dedicated to Dr. Dávid Murányi, Hungarian Natural History Museum, Budapest, Hungary, in recognition of his outstanding contributions to the plecopteran taxonomy.
3111831366
2017-09-06
MZL
G. Vincon
France
Vercors
982
45.146637
Vercors Massif
1
5.6174893
Engins
13
40
1
holotype
3111831352
2017-09-06
MZL
G. Vincon
France
Vercors
982
45.146637
Vercors Massif
1
5.6174893
Engins
13
40
4
1
3
paratype
3111831332
2017-09-06
MZL
J. - P. G. Reding
France
Vercors
982
45.146637
Vercors Massif
1
5.6174893
Engins
13
40
1
paratype
3111831354
14
41
3111831307
[189,622,1102,1127]
1990-09-16
GVC
G. Vincon
14
41
2
2
3111831355
2016-02-06
2017-05-21
2016-02-06
GVC
B. Launay & G. Vincon
Bouvante
1182
44.927914
Spring
1
5.3209577
Bourne
14
41
4
2
2
3111831322
[272,737,1354,1379]
2017-09-06
RC
J. - P. G. Reding
14
41
1
3111831336
2017-05-21
GVC
G. Vincon
Vercors
793
45.002014
Adouin river
1
5.459173
Tourtre
14
41
2
1
1
3111831398
2017-09-06
MZL, GVC
G. Vincon
14
41
31
29
2
3111831318
2017-05-21
GVC
G. Vincon
Combe Laval
355
44.997665
Cholet river
1
5.345883
Bourne
14
41
2
2
3111831306
14
41
3111831311
14
41
3111831367
[948,1117,923,947]
14
41
3111831389
[1132,1302,923,947]
14
41
3111831375
14
41
3111831331
2009-06-22
Reding
14
41
39
6
33
3111831323
14
41
3111831345
14
41
3111831386
GVC
G. Vincon
14
41
8
1
7
3111831372
MZL
J. - P. G. Reding
14
41
1
1
3111831396
1991-06-15
MC
de Sassenage & G. Vincon
Sassenage
330
45.208603
Cuves de Sassenage
1
5.651303
Isere
14
41
3
2
1
3111831309
1991-06-15
GVC
G. Vincon
885
45.1774
1
5.498091
14
41
1
3111831353
[930,1096,1498,1522]
14
41
3111831317
[1108,1272,1498,1522]
14
41
3111831302
2015-11-07
JLDC
J. Le Doare
14
41
1
3111831325
2015-06-06
BLC
B. Launay
14
41
1
3111831314
2016-01-06
B. Launay
Lans
1010
45.074543
Font Noire river
1
5.5661826
Bourne
14
41
1
1
3111831346
2016-01-06
BLC
B. Launay
Villard-de-Lans
1230
45.05623
Fauge river
1
5.577735
Bourne
14
41
1
3111831388
2015-12-07
JLDC
J. Le Doare
Lans-en-Vercors
1294
45.105076
Spring of Furon
1
5.6036873
Furon river
16
43
1
3111831347
16
43
3111831344
1986-05-10
GVC
G. Vincon
16
43
1
1
3111831377
16
43
3111831391
[377,596,1472,1497]
1992-12-09
true
16
43
4
4
3111831380
1992-06-21
GVC
G. Vincon
16
43
3
3
3111831321
16
43