Pseudolycoriella huttoni, Köhler, 2019

Köhler, Arne, 2019, The genus Pseudolycoriella Menzel & Mohrig, 1998 (Diptera, Sciaridae) in New Zealand, Zootaxa 4707 (1), pp. 1-69 : 55-56

Pseudolycoriella huttoni sp. n.

( Fig. 51 )

urn:lsid:zoobank.org:act:6434BD19-1F69-47FD-A8FB-5A73560A1082

Material studied. Holotype male. New Zealand: North Island , Taupo, Tongariro NP, Mangawhero River Valley 3 km NE Ohakune, altitude 690 m, podocarp/broadleaf forest; Malaise trap, 26.11– 28.12.2002, leg. M. & C. Jaschhof & U. Kallweit ( NZAC, SDEI-Dipt-0000621).

Description. Male. Head brown; eye bridge two to three facets wide. Flagellomeres brown, concolourous with scape and pedicel; fourth flagellomere 2.9 times as long as wide; necks of flagellomeres differentiated; surface of flagellomeres rough with deep pits; sensilla of two different lengths present; setae sparse, approximately as long as flagellomere width, bases of setae with slightly raised coronas. Prefrons and clypeus moderately bulging. Maxillary palp three-segmented; first and third palpomere equal in length, longer than second; first palpomere with five bristles and an inconspicuous patch of sensilla; first and second palpomere with one longer outward orientated bristle. Thorax brown, lateral slightly brightened. Posterior pronotum bare. Anterior pronotum with five bristles. Episternum 1 with nine bristles. Mesonotum with five longer lateral bristles; row of dorsocentral bristles present. Scutellum with two robust and some shorter bristles. Katepisternum nearly as long as high. Wing. Length 2.3 mm; width/length ratio 0.38. Membrane transparent and without macrotrichia, anal area present; all posterior veins distinct, except weak stem of M, all without macrotrichia; apical third of R 5 with nine additional macrotrichia on ventral side; bM bare; left r-m bare, right r-m with one macrotrichium; R 1 short, 0.56 times as long as R; M-fork longer than M stem; c/w ratio 0.70; r-m 0.8 times as long as bM. Haltere paler brown than thorax. Legs pale brown; coxal bristles dark; trochanter slightly darker. Fore tibia with one robust bristle among vestiture; tibial organ comprising more than half of tibial apex, consisting of a patch of bristles surrounded by a robust circular border. Mid tibia with six robust bristles among the vestiture, located on anterioventral and posterioventral side. Hind tibia with several robust bristles at anterioventral, posterior and posterioventral sides and a longitudinal row of robust bristles, which comprises one half of tibial length. Basal tarsomere of all legs with conspicuous robust bristles. All tibial spurs equal in length. Claws with one robust tooth and several minor teeth. Abdomen. Pale brown, with long dark bristles. Hypopygium ( Fig. 51 ) brown. Gonocoxites wider than long, ventrally not fused, without a basal lobe of bristles. Gonostylus long and apically curved, giving it a hump-backed appearance, 2.8 times longer than wide; apically with dense setae and a group of approximately five spines; subapically with three medium-sized whip-lash hairs; inner base of gonostylus without a remarkable angle. Tegmen strongly sclerotized, slightly wider than long, base very strongly sclerotized with long parameral apodemes; lateral margin of tegmen with a sclerotized edge; laterally scattered with several small teeth; sclerotized edge surrounds apex of tegmen; dorsal structures well developed, as long as two-thirds of tegmen. Area of teeth present, comprising fifteen teeth. Ejaculatory apodeme short, broad, and very dark, with a long, u-shaped, pale brown base. Posterior portion of gonocoxal apodeme broad and brown. Anterior portion of gonocoxal apodeme very short.

Body size: 2.6 mm.

Female. Unknown.

Genetic distances. Only one COI sequence was available. The nearest neighbour is Psl. tonnoiri , diverging by a minimum of 2.74%. The one available 28S sequence is identical to those of Psl. frederickedwardsi, Psl. jaschhofi, Psl. macrotegmenta, Psl. plicitegmenta, Psl. robustotegmenta, Psl. subtilitegmenta, Psl. tonnoiri , and Psl. wernermohrigi .

Etymology. The epithet was selected to honour Frederick Wollaston Hutton (1836–1905), who described the first New Zealand sciarid fly in 1881.

Distribution. New Zealand.

Discussion. Pseudolycoriella huttoni is morphologically very similar to Psl. wernermohrigi , but shows a considerable difference in the genetic analysis ( Fig. 61 ). As reliable distinguishing characters the length of the ejaculatory apodeme and the length of the anterior portion of gonocoxal apodeme can be used.

Figures

FIGURE 61. Phylogenetic tree of the New Zealand Pseudolycoriella species inferred from Maximum Likelihood analysis based on three concatenated genes (COI, 16S, and 28S; total length 3,053 bp) applying the model GTR+F+R4. Ultrafast bootstrap values (UFBoot; 1,000 replicates) are given if these values are greater than or equal to 95%. Intraspecific UFBoot values are not specified. Pseudolycoriella species without available genetic data are also inserted and assigned to a species complex according to the morphological results.

FIGURES 48–53. Pseudolycoriella macrotegmenta complex, hypopygia. 48. Pseudolycoriella macrotegmenta Mohrig 49. Pseudolycoriella plicitegmenta sp. n. 50. Pseudolycoriella wernermohrigi sp. n. 51. Pseudolycoriella huttoni sp. n. 52. Pseudolycoriella gonotegmenta sp. n. 53. Pseudolycoriella subtilitegmenta sp. n. Abbreviations: ba = basal angle; ds = dorsal structure on the tegmen; lt = teeth on lateral side of the tegmen.