New Oriental species of Gnoristinae with pectinate antennae (Diptera: Mycetophilidae)
Ševčík, Jan
Bechev, Dimitar
Hippa, Heikki
Acta Entomologica Musei Nationalis Pragae
2011
2011-12-09
51
2
687
696
9HJ2P
Ševčík & Bechev & Hippa, 2011
Ševčík & Bechev & Hippa
2011
[458,652,774,799]
Insecta
Mycetophilidae
Dziedzickia
Animalia
Diptera
1
688
Arthropoda
species
bifida
sp. nov.
( Figs. 1–2, 5, 10–11)
Type material. HOLOTYPE: J, THAILAND: NAKHONSI THAMMARAT: Namtok Yong NP, TV aerial, 8°14.262′N 99°48.289′E, 966 m, Malaise trap, 11.–18.viii.2008, Paiboonleg., T3109 ( QSBG). PARATYPES: THAILAND:the same data as holotype, 3 JJ 1 ♀( JSOC, QSBG). CHANTHABURI: Khao Khitchakut NP, 300 mfrom forest base to Khao Prabahtpeak, 12°50.4′N 102°9.85′E, 927 m, Malaise trap, 27.iii.–3.iv.2009, Suthida& Charoenchaileg., T4067, 1 J ( JSOC). CHIANG MAI: Chiang Dao Wildlife Research Station, 12–13.v.2004, Sivec& Horvatleg., 1 J ( DBPC); Chiang Dao, 10.–14.vi.2003, I. Sivecleg., 1 J (in DBPC). NAKHON NAYOK: Khao Yai NP, Lum Ta Kong View Point, 14°25.82′N 101°23.754′E, 744 m, Malaise trap, 19.–26.iv.2007, Wirat Sukholeg., T2129, 1 J 1♀( JSOC); Khao YaiNP, Lum Ta Kong View Point, 14°25.82′N 101°23.754′E, 744 m, Malaise trap, 26.iv.–2.v.2007, Pong Sandaoleg., T2132, 2 JJ, 1 ♀( QSBG, JSOC). SAKON NAKHON: Phu PhanNP, dry evergreen near house no. 1567, 16°48.628′N 103°53.591′E, 522 m, Malaise trap, 16.–22.vi.2007, Winlon Kongnaraleg., T2499, 1 J ( QSBG). MALAYSIA: PERAK: Hulu, Perak Belum Expedition, B. Camp, 5º30′07′′N 101º26′21′′E, 250 m, 21.iii.–14.iv.1994, I. Sivecleg., light trap, 1 J ( DBPC). SELANGOR: Ulu Gombak, University of Malaya Field Study Centre, 800 ft, Malaise trap, 22.ii.–21.iii.1997, H. Hippa, M. Jaschhofand B.Viklundleg., 1J ( NHRM). INDONESIA: SUMATRA: Aceh, Gunung Leuser Nat. Park, Ketambe Res. Sta., 1.–28.ii.1990, DC Darling, IIS 900011, 1° rainforest, young forest, Terrace3, closed canopy, 350 m, 3°41′N 97°39′E, Malaise traphead, 2 JJ ( MBBJ, JSOC). Additional material examined.The following material (mostly specimens without antennae and/or legs) is not included in the typeseries: MALAYSIA: SELANGOR: Ulu Gombak, University of Malaya Field Study Centre, 800 ft, Malaise trap, 22.ii.–21.iii.1997, H. Hippa, M. Jaschhof and B. Viklund leg., 10 JJ ( NHRM, JSOC). INDIA: MEGHALAYA:Balpakram, 1996, 1 J ( JSOC).
Description. Male.Body length 4.2 mm. Wing length 3.65 mm( holotype). Head yellowish, parietal area dark brown. Three ocelli, almost in one line. Lateral ocellus little broader than the median, separated from eye margin for distance about 1.2 times, and from median ocellus by about 0.5 times their diameter. Antennae bipectinate. Scape and pedicel yellowish. Scape prolonged forwards. Flagellomeres 1 to 3 yellowish, rest mostly brown. Flagellar projections brownish. Flagellomeres 2 to 13 with a pair of long anterolaterally directed projections ( Fig. 1), flagellomere 14 single, elongated, bifid only at its apex (not bifid in the Indian specimen). Projections covered by thin setae, little longer than the diameter of the projection. Clypeus ovate. Mouthparts yellowish, short, palpus brownish yellow, with four palpomeres, the first one is the shortest, the apical one the longest. Figs. 1–4.1–2 – Dziedzickia bifida sp. nov., head and thorax in lateral view (1 – male, holotype; 2 – female,paratype). 3–4 – D. pectinata sp. nov., head and thorax in lateral view (3 – male, holotype; 4 – female, paratype). Thorax. Scutum yellow with brown lateral stripes of variable size in posterior two thirds (all dark brown in the Indian specimen). Scutellum and pleura yellow. Scutum with acrostichal and dorsocentral setae, and somewhat longer laterals; areas in-between bare. Scutellum with an anterior transverse row of short setae and with a group of longer setae (as long as scutellum) laterally.Anterior parapsidal suture distinct. Proepisternum with some small setae. All pleura and mediotergite bare. Wing ( Fig. 5) hyaline, unmarked, membrane covered only with microtrichia, without macrotrichia. Costa produced beyond R 5to 2/3 of the distance between the tips of R 5and M 1. Sc long, bare, ending in R 1before Rs. Apical part of Sc may be indistinct or interupted. R-M about 4 times as long as Rs, and twice as long as stem of M-fork. Base of Cu-fork before the base of M-fork. CuP weak, shorter than A 1. Very small setulae present on upper side of R, R 1and R 5. Other veins bare. Halteres yellow, with knobs slightly darker. Figs. 5–9. 5–7 – wing venation (5 – Dziedzickia bifida sp. nov., holotype; 6 – D. pectinata sp. nov., holotype; 7 – Schnuseasp., male from Peru). 8–9 – Dziedzickia pectinata sp. nov., paratypes (8 – male fore tibia; 9 – female fore tarsus). Legs. Coxae, femora and fore tibiae yellow, mid and hind tibiae brownish, all tarsi brown. Tibial trichia irregularly arranged. Some longer apical setae on tibia 1 to 3. Tibial spurs formula 1: 2: 2. Anteroapical depressed area of fore tibia poorly developed. Mid tibia apically swollen. Ratio fore tibia: tarsomeres 1 to 5 = 5: 3.5: 2: 1.5: 1: 1. Abdomen yellow with dark bristles. Tergites 1 to 7 with brown posterior bands and 4 to 7 also with brownish marks in anterior part. Sternites without median sclerotized concave fold. Terminalia. Tergite 9 short, transverse, about twice as broad as long ( Fig. 11). Cerci about as long as tergite 9, placed caudally to tergite 9. Gonocoxites touching ventrally but not fused, with a deep ventral excavation reaching to about middle of the gonocoxites ( Fig. 10). Gonocoxite apically narrowing, forming a small posterior projection. Aedeagal complex apically rounded. Gonostylus with proximal lobe subtriangular, apically pointed. Distal lobe of gonostylus prolonged medially, apically rounded (with a small hook apicodorsally), with a distinct narrow ventral subapical projection ( Figs. 10–11). Female.Body length 5.7 mm. Wing length 5.35 mm. Similar to male in most respects. Head all dark brown, including palpi ( Fig. 2). Flagellomeres simple, only slightly prolonged anteriorly, dark brown ( Fig. 2). Scutum all dark brown. Scutellum, all pleura and mediotergite yellow. Abdominal tegrite 1 dark, tergites 2 to 7 with dark posterior halves and darkened laterally. Tergite 8 and terminalia dark brown.
Differential diagnosis.This species differs from all species described up to now in Dziedzickiain having bipectinate antennae. The antennae of D. pectinata sp. nov.(described below) are also pectinate but with only a single projection on each flagellomere.
Etymology.From the Latin adjective bifidus(= split), referring to the shape of male flagellomeres.
Distribution. India( Meghalaya), Thailand( Chanthaburi, Chiang Mai, Nakhon Nayok, Nakhon Si Thammarat, Sakon Nakhon), Malaysia( Perak, Selangor), Indonesia( Sumatra).
Comments.The peculiar male antennae with two projections on each flagellomere is a distinct feature of this species, hitherto known within the family Mycetophilidaeonly in the Afrotropical species Metanepsia pectinatissima Matile, 1980(see MATILE 1980). Single projections on the male flagellomeres are typical for three mycetophilid genera of the subfamily Metanepsiinae– ChalastonepsiaSøli, 1996, MetanepsiaEdwards, 1927and Pectinepsia Ševčík & Hippa, 2010(see KALLWEIT 1998, ŠEVČÍK & HIPPA 2010). Interestingly, MATILE (1981)mentioned an undescribed Oriental genus of Gnoristiniwith pectinate antennae but it is unclear which taxon he meant. Such bifid projections on flagellomeres are known within Dipteraalso in some genera of Tipulidae(e.g. CtenophoraMeigen, 1803, DictenidiaBrullé, 1833) and Limoniidae( RhipidiaMeigen, 1818).
2008-08-11
2008-08-18
2008-08-11
QSBG
Namtok Yong NP & Paiboon
Thailand
966
8.2377
NAKHON SI THAMMARAT
1
99.80482
1
688
1
Nakhon Si Thammarat
holotype
2004-05-12
2009-04-03
2004-05-12
JSOC, QSBG, DBPC
Khao Khitchakut NP & Suthida & Charoenchai & Sivec & Horvat
Thailand
300
12.84
Chiang Dao Wildlife Research Station
92
102.16417
Khao Prabaht
1
688
1
1
Chanthaburi
paratype
2003-06-10
2007-04-26
2003-06-10
DBPC, JSOC
I. Sivec & Khao Yai NP & Wirat Sukho
Thailand
744
14.430333
Lum Ta Kong View Point
9
101.3959
Chiang Dao
1
688
1
1
Nakhon Nayok
paratype
2007-04-26
2007-06-22
2007-04-26
QSBG, JSOC
Khao Yai & Lum Ta Kong View Point & Pong Sandao & Winlon Kongnara
Thailand
744
16.810467
Phu Phan
1
103.89318
1
688
1
1
Sakon Nakhon
paratype
1994-03-21
1997-03-21
1994-03-21
DBPC, NHRM
Hulu & Perak Belum Expedition, B & I. Sivec & H. Hippa & M. Jaschhof & B. Viklund
Malaysia
Camp
250
5.5019445
University of Malaya Field Study Centre
21
101.43917
Ulu Gombak
1
688
1
Perak
paratype
1990-02-01
1990-02-28
1990-02-01
MBBJ, JSOC
DC Darling & Terrace
Indonesia
Aceh
350
3.6833334
Ketambe Res. Sta.
1307
97.65
Gunung Leuser Nat. Park
1
688
1
Sumatera Utara
paratype