Phortica (Phortica) zeta Chen & Toda, 2007

Chen, Hong-Wei, Toda, Masanori J., Lakim, Maklarin B. & Mohamed, Maryati B., 2007, The Phortica Sensu Stricto (Insecta: Diptera: Drosophilidae) From Malaysia, Raffles Bulletin of Zoology 55 (1), pp. 23-41 : 33-34

Phortica (Phortica) zeta Chen & Toda , new species

( Figs. 30–35 )

Diagnosis. – Paramere medially much expanded, pubescent on submedial small part, distally with 2 processes: apical process with 1 sensillum and 3 small teeth apically; subapical process longer than apical one, with spine-shaped projection apically ( Figs. 33, 34 ); aedeagal median rod subapically expanded and asymmetrical, with 1 pair of small acute projections submedially ( Figs. 33, 35 ); aedeagal basal bridges asymmetric, tripartite, strongly sclerotized, but without small teeth except for triangular tip of anterior process ( Fig. 33 ).

Material examined. – Holotype male (terminalia dissected), MALAYSIA: Ulu Senagang, Crocker Range, Sabah, coll. M. J. Toda, 18 Oct.1999 ( KPSP).

Decription. – Male. Thorax: orange yellow. Scutellum with trifurcate brown patch, pale yellow on tip. Anepisternum with several setulae.

Wing: Hyaline.

Legs: All femora lacking patches. Midleg tibia subapically with 3–4 longer setae on anterior surface.

Abdomen: First to fifth tergites yellow; second tergite with brownish black patches submedially; third to fifth tergites each with medially nearly interrupted, laterally protruded, black band on posterior margin and 1 pair of yellow patches laterally; sixth tergite nearly entirely black, narrowed on lateral margins, with a few long strong setae on posterolateral margins.

Male terminalia: Epandrium pubescent anteroventrally and dorsomedially, with 8 setae on dorsal to posterolateral portion per side ( Fig. 30 ). Surstylus pubescent, with dense setae medially and apically rounded prensisetae on inner margin ( Fig. 31 ). Additional plate between cerci and 10th sternite pubescent, medially connected to 10th sternite ( Fig. 32 ). Posterolateral lobe of hypandrium undeveloped. Aedeagus with 1 pair of bridges ( Fig. 33 ).

Female: Unknown.

Measurements: BL = 3.78 mm in holotype; ThL = 1.94 mm; WL = 3.00 mm; WW = 1.28 mm.

Indices: arb = 6/3, avd = 0.83, adf = 2.20, flw = 1.60, FW/ HW = 0.40, ch/o = 0.08, prorb = 1.15, rcorb = 0.50, vb = 0.35, dcl = 0.60, presctl = 0.80, sctl = 1.10, sterno = 0.95, orbito = 1.60, dcp = 0.24, sctlp = 1.10, C = 2.21, 4c = 1.36, 4v = 2.43, 5x = 0.88, ac = 3.80, M = 0.50, C3F = 0.74.

Etymology. – In reference to the paramere looking like Greek letter ‘zeta’ in lateral view.

Distribution. – Malaysia (Sabah).

Remarks. – This species is very similar to P. (P.) eparmata ( Okada, 1977) from Taiwan in the shape of paramere, but can be distinguished from it by the aedeagal median rod and the aedeagal basal bridge (in P. eparmata : aedeagal median rod much expanded apically, without submedial projections; aedeagal basal bridge with a few acute teeth).

Figures

Figs. 30–35. Phortica (Phortica) zeta Chen & Toda, new species, male: 30, epandrium and cercus in lateral view; 31, surstylus in frontal view; 32, tenth sternite and additional plate in frontal view; 33, hypandrium, gonopod, paramere and aedeagus in lateral view; 34, paramere in frontal view; 35, tip of aedeagal median rod in ventral view.