Baliomorpha cyclopsensis, Oláh & Jan & Vries, 2019

Oláh, János & de Vries, Peter Jan, 2019, New Baliomorpha species (Trichoptera, Hydropsychidae) from Papua, Indonesia, with plesiomorphic state of the phallic head János Oláh & Peter Jan de Vries, Sugapa Digital 11 (2), pp. 87-93 : 89-90

Baliomorpha cyclopsensis spec. nov.

( Figs 1-7 )

urn:lsid:zoobank.org:act:6C3860CC-34F4-4960-A849-255D644D7A22

Holotype: ♂ MZB [Museum Zoologicum Bogoriense, Cibinong, Java, Indonesia], Indonesia, Papua, Sentani , Kab. Jayapura, S 02 o 32’04.0’’ E 140 o 30’47.5”, 14.iv.2018, light, leg. P.J.A. de Vries.

Diagnosis: Easily distinguished from all the known species of Baliomorpha by its unique yellowish forewing pattern, especially by the rounded circle-shaped single eye-spot near the forewing tip. Such a beautiful yellowish forewing pattern is present at Baliomorpha mariannae Oláh, 2012, described from Batanta Island, Papua, Indonesia, but it has a bright yellow body, not a brown body and its forewing pattern is without the circle-shaped eyespot on the forewing subapical. Baliomorpha caudicea Neboiss, 1984 and B. echinata Neboiss, 1984, described from Papua New Guinea, also have bold yellow blotches on the forewing, but with different patterns. The structure of the male genitalia of B. cyclopsensis spec. nov. is very similar to those of B. echinata but with a different lateral profile of segment X as well as with different fine structures of the abbreviated, but free, and not retracted phallotremal sclerites and endothecal processes (fig. 4).

Description: Male (in alcohol). Medium brown animal with seven yellowish light patches on forewing. Body and appendages brown, the dorsum of the mesothorax shining dark chestnut-brown. Antennae about twice as long as the forewing. Maxillary palp formula is I,II- IV-III-V. Forewing length 11 mm; Sc on the forewing with a less pigmented apical diverging fork connecting the subcosta with the costa and with radius1 apically; the nygma of the thyridial cell at about the middle of the cell; the forewing membrane is dark brown with seven yellowish patches: (1) the basal pair narrow longitudinal; (2) the middle pair with a most irregular costal patch; (3) the subapical pair with a larger costal patch; (4) a single subapical circle-shaped eye-spot.

Male genitalia: Segment IX with a short ventrum and a longer humpy dorsum; the apical margin of the pleuron with a vertical row of strong setae. Segment X is short subtriangular in lateral view; diverging with narrowing apices in dorsal view; the cerci are located in the middle based on the lateral lobes and represented by setal slightly elevated rounded lobes. Vestigial paraproct emarginating segment X ventrolaterad and forming a sclerotized rodshaped phallic guide connecting the ventrobased part of segment X with phallotheca. The gonopods are undivided, no articulation discernible between coxopodite and harpago; straight, long rod-shaped in lateral view and arched in ventral view. Phallobase of the phallotheca right angled to the stem; phallic head with dorsal opening housing the phallotremal sclerites at the end of ductus ejaculatoricus as well as the elongated highly sclerotized endothecal processes.

Distribution: Cyclops Mountains, the holotype is found at the lower southern slopes near Sentani, Papua, Indonesia.

Etymology: Species epithet “cyclopsensis” refers to the type locality of the species, the Cyclops Mountains in Papua, Indonesia, as well as to its main distinguishing character of the single circle-shaped eye-spot on the forewing tips that symbolizes the single-eyed giants, the Cyclops of Greek mythology.

Figures

Figs 1-3. Baliomorpha cyclopsensis spec. nov. holotype, male genital structures. Fig. 1. Lateral view of genitalia; Fig. 2. Ventral view of left gonopode; Fig. 3. Dorsal view of segments IX-X and cerci.

Figs 4-6. Baliomorpha cyclopsensis spec. nov. holotype, male genital structures. Fig. 4. Lateral view of phallus; Fig. 5. Ventral view of phallus head; Fig. 6. Dorsal view of phallus head.

Fig. 7. Baliomorpha cyclopsensis spec. nov. holotype, male. Waterfall, near Sentani, Cyclops Mountains, Papua, Indonesia [MZB] (photo: Rob de Vos).