Electrolana madelineae Schädel & Hyžný & Haug 2021, sp. nov.
Creators: name: Schädel, Mario
name: Hyžný, Matúš
name: Haug, Joachim T.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Electrolana
Electrolana madelineae

description: Electrolana madelineae sp. nov.
Figs. 2–6, 7A, 8A, 9, 10A, S 1, S 6–8
Zoobank: urn:lsid:zoobank.org:act: 8D1A3CC8- B700-4819-85A9-4ACBA02966D0
Etymology. After Madeline Pankowski of Rockville, Maryland, USA, daughter of Mark Pankowski who donated the types to the Museum of Natural History in Vienna.
Material examined. Holotype: NHMW 2017/0052/0001, Natural History Museum Vienna. Paratype: NHMW 2017/0052/0002, Natural History Museum Vienna.
Ontogenetic stage of the type. The paratype is of a manca stage; the holotype is a post-manca juvenile or an adult.
Type locality. Near Noje Bum, Hukawng Valley, Kachin State, Myanmar.
Type stratum. Unknown stratum, 98.8 million years, earliest Cenomanian, earliest Late Cretaceous, after Shi et al. (2012).
Differential diagnosis. Body drop shaped in dorsal view, tapering posteriorly, about 2.5 to 2.2 times longer than wide; tergite of trunk segment 1 about twice as long as succeeding segments; dactylus and claws of trunk appendages 1–3 gently curved inwards, not hook-like; coxal plates well developed, triangular in trunk segments 4–7 (postocular segments 10– 13); basipod of trunk appendage 6 broad, posterior margin convex, median ridge along the mid-line of the lateral surface; coxal plate of trunk segment 7 (postocular segment 13) very conspicuous in dorsal view, extending distally to the level of pleon segment 5; tergites of pleon segments 1–5 (postocular segments 14–18) free; tergite of pleon segment 1 (postocular segment 14) short, laterally covered by the tergite of trunk segment 7 (postocular segment 13); basipod of pleopod 1 (postocular segment 14) wider than long; pleopod 1 not operculate, concealing the succeeding pleopods; tergite of pleon segment 5 (postocular segment 18) with free lateral margins, not covered by the tergite of the preceding segment; endopod of pleopod 5 (postocular segment 18) more slender than the corresponding exopod, no setae on the distal margin; pleotelson half-oval in shape, slightly longer than wide, straight anterior margin, without distinct ornamentation on the dorsal surface, posterior margin without large spines, posterior margin with numerous setae grouped in the posterior-most part; uropod endopod about twice as long as wide, with median angle, not ’truncated’.
Remarks on the differential diagnosis. Due to the limited set of characters available, using the current methods, this diagnosis will not be able to differentiate the new species from all fossil or extant species. Thus, this differential diagnosis should be seen as a short recap of the description with respect to the discussion above.
Systematic interpretation. Cymothoida incertae sedis, nec Anuropus, nec Tridentella, nec Corallanidae, nec Aegidae, nec Cymothoidae, nec Epicaridea, nec Gnathiidae, nec Protognathia, nec Urda, nec Bathynomus, nec Colopisthus, nec Boorlana, nec Parabathynomus, nec Bahalana, nec Arubolana, nec Cirolanides, nec Typhlocirolana, nec Turcolana, nec Speocirolana, nec Sphaeromides, nec Skotobaena, nec Sphaerolana, nec Atarbolana, nec Aphantolana, nec Annina, nec Pseudaega, nec Politolana, nec Oncilorpheus, nec Natatolana, nec Haptolana, nec Excirolana, nec Eurydice, nec Conilera, nec Dolicholana. The following extant ingroups of Cymothoida represent likely affinities for Electrolana madelineae sp. nov.: Aatolana, Pseudolana, Plakolana, Odysseylana, Neocirolana, Eurylana, Baharilana, and Cirolana.
Remarks on the systematic interpretation. The Latin term nec (= but not) is used to list ingroups of Cymothoida, to which Electrolana madelineae sp. nov. does not belong (as applied in Schädel et al., 2019a).
description: Published as part of Schädel, Mario, Hyžný, Matúš & Haug, Joachim T., 2021, Ontogenetic development captured in amber - the first record of aquatic representatives of Isopoda in Cretaceous amber from Myanmar, pp. 1-29 in Nauplius (e 2021003) (e 2021003) 29 on pages 21-23, DOI: 10.1590/2358-2936e2021003, http://zenodo.org/record/10716431