Anapeza Gagné, 2015

Gagné, Raymond J. & Etienne, Jean, 2015, Three new genera and three new species of Lasiopteridi (Diptera: Cecidomyiidae) on Rubiaceae from Guadeloupe, French West Indies, and a key to genera of Neotropical Lasiopteridi unplaced to tribe, Zootaxa 4028 (4), pp. 511-526 : 517-519

Anapeza Gagné , new genus

Figs. 20–34

Diagnosis. Uniquely derived characters of this genus are: the separated eyes at the vertex; the swollen tarsal claws; the abdominal tergites and sternites not demarcated by sclerotization from surrounding area; the swollen female fused cerci covering the end of the abdomen; and the sclerotization of the area surrounding the spatula. Other non-unique derived characters that serve to limit this genus are: the palpus of a single large segment bearing some setae appreciably longer than the palpus; antennae reduced to 10–11 flagellomeres; greatly reduced number of bent setae and enlarged alveoli on the female flagellomeres; R5 reaching C slightly anterior to wing apex; and abdominal sclerites lacking an anterior pair of trichoid sensilla.

Description. Adult. Head (Fig. 20): Eye facets circular, contiguous except slightly farther apart near level of antennal bases; eyes narrowed at approach to vertex ( Fig. 25 ), separated by about 5 facet diameters. Antenna: scape and pedicel with setae and scales ventrally; first and second flagellomeres connate. Male antenna with 10-10+ flagellomeres, all but apical with short necks; flagellomeres (Fig. 20) with circumfila consisting of a complete subbasal ring and a partial distal ring connected by two vertical strands; short, straight setae encircling node below proximal circumfilum; many long, basally curved setae from hooded alveoli present between circumfila, chiefly on venter, very few dorsally. Female antenna with 10–11 flagellomeres ( Fig. 24 ) without necks and with 2 complete circumfila surrounding node connected by 2 vertical strands. Frons convex, covered with many setae and scales. Labella ( Fig.26 ) ovoid in frontal view, each with 2–3 short setae apically. Palpus ( Fig. 26 ) of 1 well-defined, broadbased segment, slightly longer than wide, convex apically, with numerous strong setae surpassing length of palpus, a few scales intermixed.

Thorax: Scutum with 4 longitudinal rows of setae with a few scales intermixed, the 2 dorsocentral rows broadest anteriorly, tapering posteriorly and vanishing before scutellum, the 2 lateral rows continuous along length of sclerite. Scutellum with setae on anterior half but discontinuous mesally. Anepisternum with a few scales dorsally; anepimeron setose; pleura otherwise bare. Wing ( Fig. 29 ): C broken beyond junction with R5; R5 faintly curved, reaching C anterior to wing apex; M not apparent; CuA forked. Acropods ( Figs. 27–28 ): tarsal claws curved, expanded laterally beyond midlength, tapered to apex, with long, prominent basal tooth of similar shape; empodia as long as claws; pulvilli about half length of claws.

Male abdomen ( Fig. 30 ): Tergites and sternites without anterior pair of trichoid sensilla, sclerites unpigmented, unmarked except by extent of vestiture. Tergites: first with sparse setae and scales laterally, second through sixth with single posterior row of setae and several rows of scales behind, seventh with numerous scales covering an area half as wide as sixth tergite, eighth with a few scales centrally. Sternites: second through fifth with 2 slightly separated, irregular horizontal rows of setae mixed with scales, seventh and eighth with the two groups of setae not separated. Pleura sparsely covered with scales. Terminalia ( Figs. 31–32 ): cercus ellipsoid, with a few setae dorsally and ventrally on apical third; hypoproct as long as cerci, tapering to convex apex, with distal pair of dorsal setae; lateral part of gonocoxite cylindrical, its mediobasal lobe entire, clasping but shorter than aedeagus, with several short apical setae on raised bases, otherwise covered with long setulae; apodeme divided; gonostylus cylindrical, widest at base, gradually tapered to apical tooth, almost wholly setulose except dorsoventrally; aedeagus slightly recurved dorsally, blunt apically.

Female abdomen (Figs. 21, 33): Tergites and sternites undefined as in male except that setation of seventh and eighth tergites similar to preceding segments and eighth sternite unmarked with setae. Ovipositor only slightly protrusible, setose posteroventrally, setae fairly dense and of uniform length; cerci fused, swollen and foreshortened, covering posterior end of ovipositor, with peripheral setae as long as posteroventral setae of protrusible part of ovipositor and posterior surface covered with very short, dense, erect setae no longer than surrounding setulae; hypoproct in ventral depression of fused cerci.

Pupa (Figs. 22–23). Integument unpigmented except at apices of anterior projections of antennal bases that are widely separated and dorsoventrally flattened with crenellate apical edges. Vertex with two short-setose papillae not situated on raised bases. Face smooth, without lobes or apparent papillae. Prothoracic spiracle short. Abdominal terga, pleura and sterna evenly covered with spiculae. Spiracles on third through sixth abdominal segments button-like, no longer than wide.

Larva, third instar: Integument smooth. Head capsule hemispherical, without apodemes; antennae about as long as wide. Venter of first thoracic segment ( Fig. 34 ) with spatula bilobed at apex and considerably broadened at posterior end of shaft, and a lunulate area anterior to spatula beginning at collar segment and encompassing sternal papillae. Papillae other than prothoracic sternal papillae not visible in preparations. Spiracles visible but tiny.

Type-species, Anapeza tumida Gagné

Etymology. The name Anapeza combines the Greek words ana and peza to mean "without a border," in reference to the lack of sclerotized demarcation on the abdominal sclerites.

Remarks. Anapeza most resembles Novocalmonia Ozdikmen among other unplaced Neotropical genera of Lasiopteridi chiefly in reductions of body parts, such as the one-segmented palpus, the short antenna, the widely separated antennal bases of the pupa, and the reduction of larval papillae ( Gagné & Etienne 2009). Species of both genera are tiny, but with miniaturization the same body parts are affected and cannot be presumed synapomorphic. The two genera differ most strikingly in that Anapeza has unpigmented, differentially unsclerotized abdominal sclerites that are well delimited in Novocalmonia . Major differences between the two genera are in the female cerci and tarsal claws. Cerci of Anapeza are fused and bulbous (Fig. 21) while those of Novocalmonia are discrete and much smaller. The swollen tarsal claws of Anapeza ( Figs. 27–28 ) are unlike any found elsewhere in Lasiopteridi.

Figures

FIGURES 24 – 34. Anapeza tumida. 24, Female fourth flagellomere (ventral). 25, Eyes at vertex (frontal). 26, Palpi and labella (frontal). 27, Acropod (ventral). 28, Same (lateral). 29, Wing. 30, Male sixth through eighth abdominal segments (dorsolateral; dashed lines indicate sternites). 31. Male terminalia (dorsal). 32, Gonocoxal mediobasal lobes, aedeagus, and apodeme (dorsal). 33. Female postabdomen (dorsal). 34, Larval spatula and surrounding area.