Tubuca dussumieri
Creators: name: Michie, Laura A.
name: Barnes, R. S. K.
name: Clark, Paul F.
name: Bennett, Wayne A.
name: Cragg, Simon M.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Ocypodidae
Tubuca
Tubuca dussumieri

description: <i>Tubuca dussumieri</i> (H. Milne Edwards, 1852) (Figure 12a–j) <b>Material examined.</b> 9 &amp;male;, 13 &amp;female;, Kaledupa, Indonesia, 5º 29’ 50’’S, 123º 45’ 20’’E, mud flat in front of mangroves, under houses, L. Michie, 26.08.2014. 11 &amp;male;, 7 &amp;male;, Kaledupa, Indonesia, 5º 29’ 50’’S, 123º 45’ 21’’E, mud flat in front of mangroves, coll. L. Michie, 28.08.2014. <b>Diagnosis.</b> Carapace: broader than long, smooth; front narrow and practically straight; anterolateral angles acute, not produced; anterolateral margins short; dorsolateral margins distinct and converging. Major cheliped: elongated dactyl and pollex; pollex with medial tooth; gape between dactyl and pollex is triangular in shape due to distinct angle of dactyl; breadth of dactyl consistent along its entire length and only tapers at tip. <b>Colouration</b> (Figure 12a–d). Adult male. Carapace: black, sometimes with two or three central white markings, anterior ventral surface of carapace and third maxillipeds normally black. Major cheliped: dactyl generally white extending dorsally onto manus, pollex with a white tip and remainder orange which extends ventrally onto manus, usually becoming darker, carpus is a mixture of white, orange and brown, remainder of cheliped usually orange. Minor cheliped &amp; ambulatory legs: generally black, sometimes with last pair blue/white. Adult female. Carapace: similar to male. Ambulatory legs: similar to males, except sometimes all legs are blue/white. Juvenile male. Carapace: most often black with two or three central white markings. Major cheliped: dactyl and pollex normally white, remainder is orange. Juvenile female. Similar to adult females. Ambulatory legs: blue/white. <b>Gonopod morphology</b> (Figure 12e–h). G1 curved in dorso-lateral direction; large anterior flange, with dark spine at tip of anterior edge; distal protuberance short; pore of sperm channel in midline. <b>Gastric mill</b> (Figure 12i, j). Urocardiac ossicles simple, with 5 transverse ridges of median teeth, 1–4 decreasing in size distally, fifth one larger and attached to plate dorsally; stem region has 1 pair of cusps. Lateral tooth plate with 18 comb-shaped teeth. <b>Biology.</b> <i>Tubuca dussumieri</i> is a medium-size species (largest male CL = 14.6 mm, CB = 29.4 mm, largest female CL = 15.9 mm, CB = 24.9 mm); one of the least abundant species on shore, present in mid and high intertidal zones, predominantly associated with shade under buildings or mangrove trees. <b>Distribution.</b> China, Taiwan, Thailand, Indonesia, Northern Australia, Papua New Guinea. <b>Remarks.</b> <i>Tubuca dussumieri</i> is the largest species at Ambeua which, along with the large anterior flange of the G1, distinguishes it from the other <i>Tubuca</i> species. The specimens examined agree with the original description. This is however, the first description of the gastric mill for <i>T</i>. <i>dussumieri</i> and the simple morphology which distinguishes it from other Ambeua genera and is similar to the other <i>Tubuca</i> species.
description: Published as part of <i>Michie, Laura A., Barnes, R. S. K., Clark, Paul F., Bennett, Wayne A. &amp; Cragg, Simon M., 2021, Distinguishing ten sympatric species of fiddler crab (Decapoda: Ocypodidae) using a suite of phenotypic characteristics, pp. 480-506 in Zootaxa 5026 (4)</i> on page 501, DOI: 10.11646/zootaxa.5026.4.2, http://zenodo.org/record/5300736