Wallaconchis comendadori Goulding & Dayrat

Goulding, Tricia C., Khalil, Munawar, Tan, Shau Hwai & Dayrat, Benoit, 2018, Integrative taxonomy of a new and highly-diverse genus of onchidiid slugs from the Coral Triangle (Gastropoda, Pulmonata, Onchidiidae), ZooKeys 763, pp. 1-111: 1

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Wallaconchis comendadori Goulding & Dayrat

sp. n.

Wallaconchis comendadori Goulding & Dayrat  sp. n. Figs 54, 55, 56, 57, 58

Type locality.

Philippines, Bohol, Guindulman, 09°44.06'N, 124°27.63'E, st 197, rocks and coral rubble near a few Avicennia  trees.

Type material.

Holotype: 12/11 mm [3626], designated here (PNM 041232).

Additional material examined.

Indonesia, Sulawesi, Mantehage Island, 01°41.88'N, 124°46.74'E, 1 specimen 15/7 mm [2315], st 91, rocks behind a mangrove of Sonneratia  and Rhizophora  (UMIZ 00060); Ambon, Haruku Island, 03°36.52'S, 128°25.07'E, 2 specimens 12/7 mm [2725] and 7/6 mm [3539], st 127, rocky Sonneratia  mangrove with coral rubble (UMIZ 00061); Lombok, Don Don, 08°54.54'S, 116°21.50'E, 2 specimens 18/12 mm [2985] and 7/6 mm [2983], st 149, old Avicennia  forest with coral rubble (UMIZ 00063); Bali, Pemuteran, Labuhan Lalang Harbor, 08°08.61'S, 114°32.33'E, 2 specimens 16/8 mm [3133] and 13/9 mm [3131], st 157, coral rubble, rocks and a few Avicennia  (UMIZ 00064). Philippines, Bohol, Guindulman, 09°44.06'N, 124°27.63'E, 2 specimens 30/11 mm [3627] and 19/15 mm [3630], st 197, rocks and coral rubble near a few Avicennia  trees (PNM 041233); Bohol, Maribojoc, 09°44.020'N, 123°47.45'E, 2 specimens 22/13 mm [3385] and 21/16 mm [3400], st 200, coral rubble with sand, low tide at night (PNM 041234).


Indonesia: Ambon, Bali, Lombok, and Sulawesi. Philippines: Bohol.


(Fig. 54, Table 3). Wallaconchis comendadori  is found in the rocky intertidal, on rocks or large pieces of coral rubble, generally covered by a thin mat of algae.


This species is dedicated to Joseph Comendador, from the National Museum of the Philippines. Our expedition in the Philippines would not have been possible without his help with logistics, and we enjoyed exploring mangroves with him.


(Table 5). Externally, Wallaconchis comendadori  cannot be distinguished from brown or black specimens of other Wallaconchis  species, although a bright yellow, longitudinal band on the dorsum is more commonly found in this species. Internally, the narrow penis, a free oviduct (not attached to the body wall by fibers), and the apple-shaped spermatheca distinguishes W. comendadori  from most Wallaconchis  species, except W. melanesiensis  , from which it differs by having a longer penis and a more highly convoluted deferent duct.

Color and morphology of live animals

(Fig. 55). Animals are not frequently brightly colored. The dorsal notum is predominantly brown or black, which may be mixed with subtle patches of yellow, green, red, and grey. A median, longitudinal yellow band was observed in a few individuals. The ocular tentacles are brown or grey. The hyponotum is light or bright yellow. The foot is bright yellow or light yellow-grey.

External morphology.

Between five and seven papillae bear eyes (with three or four eyes per papilla) but more may be retracted. There is a retractable papilla with eyes in the center of the dorsal notum, which is not raised above the other papillae.

Digestive system

(Fig. 56, Table 4). Examples of radular formulae are presented in Table 4. The length of the rachidian teeth is approximately 15-22 µm, significantly smaller than that of the lateral teeth. The length of the lateral teeth (from 30 to 60 µm) gradually increases from the inner to the outer teeth (excluding the innermost and outermost lateral teeth which are significantly smaller). The intestinal loops are of type I.

Reproductive system

(Fig. 57A). The oviduct is narrow, approximately the same width as the deferent duct. The spermatheca is apple-shaped, with two lobes, and joins the oviduct through a short duct.

Copulatory apparatus

(Figs 57B, 58). The penis (more than 1.5 mm long) is narrow (approximately 100 µm) and smooth with no hooks (Fig. 58). The penial sheath is narrow proximally, and gradually widens distally into a vestibule. The penis is within the narrow region of the vestibule. The deferent duct is extremely convoluted (Fig. 57B), but slightly less convoluted in immature specimens. The length of the penial sheath equals approximately two thirds to three quarters the length of the body cavity. The deferent duct is approximately the same width as the penial vestibule. The retractor muscle is narrow and inserts at the posterior end of the body cavity, near the rectum.