Notopterophoroides baliense, Kim & Boxshall, 2020

Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), Megataxa 4 (1), pp. 1-6 : 178-179

publication ID	https://doi.org/ 10.11646/megataxa.4.1.1
DOI	https://doi.org/10.5281/zenodo.5828408
persistent identifier	https://treatment.plazi.org/id/03C487CB-EFE0-3A87-FF4D-FAFFFA8BFE8E
treatment provided by	Plazi
scientific name	Notopterophoroides baliense
status	sp. nov.

Treatment

Notopterophoroides baliense sp. nov.

( Figs. 114–116 View FIGURE 114 View FIGURE 115 View FIGURE 116 )

Typematerial. Holotype (intact ♀, MNHN-IU-2014- 21252 ) , paratypes (2 intact ♀♀, MNHN-IU-2014-21253) , and dissected paratypes (2 ♀♀) from Ascidia gemmata Sluiter, 1895 (MNHN-IT-2008-XXX = MNHN P5/ ASC.A/ XXXX), CRRFCRCHO 434, Bali, Indonesia, Tulamben, depth 20 m, Colin coll., 30 October 2000.

Etymology. The name of the new species is based on the type locality, Bali.

Descriptionoffemale. Body ( Fig. 114A View FIGURE 114 ) narrow, bilaterally compressed, with thick, rigid exoskeleton ornamented with numerous, irregularly shaped, pore-like pits mainly on prosomal surfaces ( Fig. 114C, E View FIGURE 114 ). Body length 1.55 mm. Prosome 1.36 mmlong, consistingof cephalothoraxand 3 pedigeroussomites (second to fourth). Cephalothorax triangular, 0.35×0.30 mm in lateral view, narrowerthan pedigerous somites, with sternal spike on ventral surface just posterior to intercoxal sclerite of leg 1 and overlapping protopod of leg 2 ( Fig. 115E View FIGURE 115 ). Free pedigerous somites lacking sternal spikes, 0.22×0.43, 0.27×0.48, and 0.52×0.45 mm, respectively, inlateral view. Fourthpedigerous somite forming brood pouch tapering posteriorly, characteristically terminating in conical process: fifth pedigerous somite incorporated into brood pouch. Free urosome ( Fig. 114B View FIGURE 114 ) 5-segmented: genital somite 60×128 μm, with rows of fine spinules on ventral surface. Four abdominal somites 106×114, 76×97, 45×77, and 40×71 μm, respectively; first to third abdominal somites ornamented with scattered long setules along posterior border. Anal somite ( Fig. 114D View FIGURE 114 ) slightly protruded posteroventrally and ornamented with spinules on ventral surface. Caudal ramus ( Fig. 114D View FIGURE 114 ) small, 36×24 μm, covered with dense spinules distally: armed with 3 claws and 3 setae; claws spiniform, blunt at tip, 23, 21, and 16 μm long; setae naked, shorter than width of ramus, distal seta inserted proximally on distal claw.

Rostrum ( Fig. 114E View FIGURE 114 ) as semicircular anterior protuberance on cephalothorax, not articulated at base. Antennule ( Fig. 114F View FIGURE 114 ) 7-segmented; armatureformula 7, 11, 10+aesthetasc, 5, 2+aesthetasc, 4+aesthetasc, and 7+aesthetasc; setae mostly naked, except 5 pinnate setae (2 on first segment, 1 on second, and 2 on third); one seta on second segment spiniform. Antenna ( Fig. 114G View FIGURE 114 ) 4- segmented; coxa short; basis about 1.6 times longerthan wide, with large pinnate (exopodal) seta at outer distal corner and 2 rows of minute spinules on inner surface; first endopodal segment about 1.4 times longerthan wide, with 1 small subdistal seta on inner side; compound distal endopodal segment slender, about 3.4 times longer than wide (75×22 μm), ornamented with spinules along inner margin and setules distally on outer margin; armed with 9 setae (including 3 bluntly tipped distal setae) plusterminal claw about half as long as segment.

Labrum ( Fig. 114H View FIGURE 114 ), mandible ( Fig. 114I View FIGURE 114 ), and maxilla ( Fig. 115B View FIGURE 115 ) similarto those of N. armadillo . Maxillule lacking subdivision on endopod, otherwise asin N. armadillo . Maxilliped ( Fig. 115C View FIGURE 115 ) distinctly 2-segmented with 9 setae (4 proximal and 5 distal) on medial margin of first segment and 2 apical setae on second segment; row of fine spinules present on first segment near base of mediodistal setae.

Leg 1 ( Fig. 115D View FIGURE 115 ) with 3-segmented exopod and 2-segmented endopod. Legs 2–4 ( Figs. 115D, E View FIGURE 115 , 116A, B View FIGURE 116 ) with 3-segmented rami but articulations incomplete between second and third endopodalsegments in legs 2–4. Coxa of legs 1–4 lacking inner seta. Outer setaon basis of leg 1 not enlarged, only slightly longer than first exopodal segment, as in legs 2–4. Inner distal spine on basis of leg 1 straight, 30 μm long, longer than first endopodal segment. Third exopodal segment of leg 1 bearing seta (not spine) as proximalmost outer element. Third exopodal segment of legs 2–4 thin, with setule between second and third outer setae in leg 2 and between first and second outer setae in legs 3 and 4. Armature formula for legs 1–4 as follows:

	Coxa	Basis	Exopod	Endopod
Leg 1	0-0	1-I	I-1; I-1; 1, I, 5	0-0; 1, 2, 3
Leg 2	0-0	1-0	1-0; 1-0; 3, 1, 4	0-1; 0-1, 1, 2, 3
Leg 3	0-0	1-0	1-0; 1-0; 2, 1, 4	0-1; 0-1, 1, 2, 3
Leg 4	0-0	1-0	1-0; 1-0; 2, 1, 4	0-1; 0-1; 1, 2, 2

Leg 5 ( Fig. 116C View FIGURE 116 ) consistingof rectangular protopodal plate and free exopod; protopodal plate with seta at each outer distal corner; ornamented with rows of spinules ventrally near base of exopod; exopod about 2.2 times longer than wide (43×19 μm), with lateral margins parallel proximally but tapering in distal quarter, tipped with apical seta (pinnate or naked), and ornamented with setules proximally on inner margin and dense spinules on remaining part of margins.

Male. Unknown.

Remarks. Notopterophoroides baliense sp. nov. is instantly recognizable by the conical process at the posterior end of the brood pouch. In addition, it has a single large sternal spike on the ventral surface of the cephalothoraxjust posteriorto the intercoxalsclerite ofleg 1, unlike N. armadillo which bears 3 sternal spikes and N. malacodermatus which either has none or has only small sternal spikes ( Schellenberg, 1922). The possession of only a single inner seta on the second endopodal segment of legs 2–4 also seems to be a diagnostic feature.