Laeta waheedae,

Lau, Yee Wah & Reimer, James D., 2019, A first phylogenetic study on stoloniferous octocorals off the coast of Kota Kinabalu, Sabah, Malaysia, with the description of two new genera and five new species, ZooKeys 872, pp. 127-158: 127

publication ID

http://dx.doi.org/10.3897/zookeys.872.36288

publication LSID

lsid:zoobank.org:pub:BDF92DBF-34CE-4600-939D-2573C7D4F0B4

persistent identifier

http://treatment.plazi.org/id/761E7919-D311-4F0B-8B67-17E8ECDEC370

taxon LSID

lsid:zoobank.org:act:761E7919-D311-4F0B-8B67-17E8ECDEC370

treatment provided by

ZooKeys by Pensoft

scientific name

Laeta waheedae
status

sp. nov.

Laeta waheedae  sp. nov. Figures 2 d–fView Figure 2, 5View Figure 5

Material examined.

All specimens are from Kota Kinabalu, Sabah, Malaysia and collected by YW Lau. Holotype: NSMT-Co 1680, Udar, east of Udar Island (06°4'49.81"N, 116°5'13.16"E), 10 m depth. Paratypes: IPMB-C 01.00018, Mid Reef, east of Manukan Island, TARP (05°58'46.1"N, 116°00'10.6"E), 8 m depth. IPMB-C 01.00019, Gaya, Gaya Island, TARP (06°01'24.26"N, 116°00'13.55"E), 11 m depth.

Description.

The colony consists of ~50 polyps, which are connected through ribbon-like stolons (0.5-0.6 mm width). Polyps are spaced apart quite regularly (~3 mm). Anthocodiae retract fully into low oval to cylindrical calyces (~1 mm in width, ~0.5 mm in height), which do not retract into the stolon. Expanded polyps 3.5-4.0 mm in diameter. Oral membrane with eight shallow furrows running from intertentacular margin to mouth of polyp, dividing the membrane into eight shallow lobes. Distal two-thirds of tentacles extend from fused margins of the oral membrane. Tentacles with 6-8 pairs of widely spaced pinnules are arranged in a single row on either side of rachis.

Sclerites of anthocodiae are small smooth rods, 0.035-0.1 mm in length, with little ornamentation ( Figure 5cView Figure 5). Sclerites of calyx are table-radiates, 0.06-0.10 mm ( Figure 5d, e, gView Figure 5) and three types of rods: (1) rods branched with high tuberculate processes, 0.08-0.09 mm long ( Figure 5fView Figure 5), (2) rods with tubercles at one distal end of the rod, giving it a club-like appearance, 0.1-0.14 mm long ( Figure 5aView Figure 5), and (3) rods with table-shaped tubercles, 0.08-0.12 mm long ( Figure 5bView Figure 5).

Oral membrane has a blue colour in life (yellowish white when preserved in ethanol). The tentacles are brown in colour, partially with a greenish shimmer. Zooxanthellate.

Morphological variation.

The paratype colony consists of ~30 polyps. Tentacles of paratypes show variation in pinnule pairs, partly having nine pairs of widely spaced pinnules arranged in a single row on either side of rachis.

Distribution.

Udar Island, Kota Kinabalu, Sabah, Malaysia. Gaya Island, TARP, Kota Kinabalu, Sabah, Malaysia.

Remarks.

Polyps of Laeta waheedae  gen. nov. et sp. nov. have the same blue-purple colour in life as those of Arula petunia  McFadden & Ofwegen, 2012, but there is a difference in the outer margins and lobes of the oral membrane; both are more pronounced in Arula petunia  . The holotype colony was attached to sponge tissue, but this epibiotic relation is not obligate.

Etymology.

Named after Dr. Zarinah Waheed, for her dedication to coral reef research and her guidance during fieldwork in Sabah.

Kingdom

Animalia

Phylum

Cnidaria

Class

Anthozoa

Order

Alcyonacea

Family

Arulidae

Genus

Laeta