Manota perissochaeta, Hippa, Heikki, 2007

Hippa, Heikki, 2007, The genus Manota Williston (Diptera: Mycetophilidae) in Melanesia and Oceania, Zootaxa 1502, pp. 1-44 : 14-17

Manota perissochaeta sp. n.

( Figs 1 C, 7A–C, 8A–C)

A small-sized Manota

Male. Coloration. The probably strongly faded specimens are pale yellowish-brown, frons vertex and dorsal part of occiput darker brown, antennal flagellum becoming darker brown towards the apex, apex of coxa, trochanter and base of femur on legs 2 and 3 darker brown, wing unicolorous, hyaline, with greyish tinge, the knob of haltere darker greyish-brown. Head. Antennal flagellomere 4, Fig. 8 C. Palpomere 3 of maxillary palpus with apicomesial extension, with 4–5 apically expanded curved sensilla; palpomere 4 with parasegment. Thorax. Pleural setosity pattern, Fig. 1 C: anepisternum with 21–31 setae; anterior basalare nonsetose; preepisternum 2 setose, with 4–5 setae; laterotergite setose, with 22–26 setae; episternum 3 setose, with 1–3 setae. Wing. Length 1.3 mm. Hypopygium ( Figs 7 A–C, 8A, B). Sternite 9 rather small, not reaching halfway between the base of gonocoxa and the base of gonostylus, laterally sharply delimited, the posterior margin notched, the anterior margin deeply notched, the setae mostly similar to the ventral setae of gonocoxa but with some slightly stronger setae apicolaterally, in the specimen from New Guinea there are only the stronger posterior setae present. The ventral mesial margin of gonocoxa straight, with an angulate or rounded lobe posteriorly. Parastylar lobe small, not exposed in ventral view but covered by the lobe on the ventral mesial margin of gonocoxa, with two setae directed mesad or obliquely posteriad. Paraapodemal lobe not exposed in ventral view of hypopygium. The dorsal mesial margin of gonocoxa with three weakly expressed setose lobes on apical half. The juxtagonostylar setae two in number, consisting of a flattened and slightly expanded megaseta and a strong seta, both arising from a short separate basal body, in the specimens from the Solomon Islands ( Figs 7 A, B) the megaseta has a more pronounced angle on posterior margin than the specimen from New Guinea ( Figs 8 A, B). Gonostylus elongate, simple, rather uniformly setose except for a mesial apicodorsal aggregation of densely placed rather short setae; in all the specimens from the Solomon Islands the gonostyli are turned so that the mesial side is in lateral position. Tegmen narrow, with weakly defined lateral shoulders. Hypoproct reaching posteriorly the level of the basal part of gonostylus, with ca 40 scattered ventral setae on each half, with a very long stronger seta at anterior margin on each half. Cerci medially united.

Female and preimaginal stages unknown.

Discussion. The specimens from the Solomon Islands have sternite 9 more setose than the specimen from New Guinea. Their juxtagonostylar megaseta also seems to be more angular on the posterior margin, but this may result from a slightly different angle of view.

M. perissochaeta somewhat resembles M. explicans . It differs by having the dorsal lobes of gonocoxa much weaker, by having a long lateral margin on tergite 9, by the straight ventral mesial margin of gonocoxa, by a very small parastylar lobe, by having the hypoproct of the usual dimensions, not unusually large, by having a pair of very long setae at the posterior margin of hypoproct, and by having two juxtagonostylar setae, one megaseta and one normal seta, instead of only one megaseta. M. perissochaeta is the only Manota in which the hypoproct has the long setae as described here. The hypopygium of M. perissochaeta and M. explicans is not dissimilar to that of M. serawei , M. ctenophora and M. taedia , but the latter species have setose anepisternum. For further discussion, see under M. serawei .

Types. Holotype. Male, Solomon Islands, San Jorge, Casuarina Forest , nr. stream, vac. collector, low herbage and litter 26.ix.65, Roy. Soc. Exped., B.M. 1966-1, (in BMNH).

Paratypes. 2 males with same data as holotype (in BMNH).

Other material. 1 male, Papua New Guinea, Madang province, Hapurpi village, nr. Halopa mission, 700 m a. s. l., S 5o 05’, E 145o 41’, primary rainforest, Malaise trap, February 2001, Amari & Novotny leg. (in NRM).

Figures

FIGURE 1. Pleura, lateral view. A. Manota serawei sp. n. (holotype). B. M. explicans sp. n. (paratype). C. M. perissochaeta sp. n. (paratype). D. M. spathula sp. n. (holotype). E. M. bicuspis sp. n. (paratype). Scale 0.10 mm.

FIGURE 7. Manota perissochaeta sp. n. (holotype): A. Hypopygium, dorsal view. B. Hypopygium, ventral view. C. Antennal flagellomere 4, lateral view. Scale for A and B 0.10 mm, for C 0.05 mm.

FIGURE 8. Manota perissochaeta sp. n. (from New Guinea): A. Hypopygium, dorsal view. B. Hypopygium, ventral view. C. Gonostylus, dorsal view. Scale 0.10 mm.