Porirualia pyriformis ( Song, Kim & Chang, 2003 ) Huys, Rony & Mu, Fanghong, 2021

Huys, Rony & Mu, Fanghong, 2021, Johnwellsia, a new intertidal genus of Parastenheliidae (Copepoda, Harpacticoida) from the Taiwan Strait, China, including a review of the family and key to genera, Zootaxa 5051 (1), pp. 236-318 : 304

publication ID	https://doi.org/ 10.11646/zootaxa.5051.1.13
publication LSID	lsid:zoobank.org:pub:F94203E7-FCD1-4975-BAD3-0DF534806712
DOI	https://doi.org/10.5281/zenodo.5576525
persistent identifier	https://treatment.plazi.org/id/951887EA-FF87-FFDA-FF51-D006E0BBFA67
treatment provided by	Plazi
scientific name	Porirualia pyriformis ( Song, Kim & Chang, 2003 )
status	comb. nov.

Treatment

Porirualia pyriformis ( Song, Kim & Chang, 2003) comb. nov.

Parastenhelia pyriformis Chang, Kim & Chang, 2003

Original description. Song et al. (2003): 221–227; Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ; Table 1 View TABLE .

Type locality. South Korea, Jeju Island, Sehwa Beach (33°28’07” N, 126°54’43” E); shallow sublittoral zone GoogleMaps .

Differential diagnosis. This coincides with Song et al. ’s (2003) description of Parastenhelia pyriformis .

Notes. Song et al. (2003) added a second record from Seungbong Island in the Yellow Sea where it was found to be associated with macroalgae ( Zostera japonica ) on sandy bottoms (see also Song et al. 2012).

The two species can be distinguished, in both sexes, by (a) rostrum size (reaching to distal margin of segment 5 of the antennule in Po. megarostrum vs halfway segment 4 in Po. pyriformis ), (b) antennary morphology (allobasis partially divided by surface suture and exp-2 with four setae/spines vs allobasis without trace of original segmentation and exp-2 with five elements, i.e. with additional apical seta), (c) armature of mandibular basis (with one spine and three setae vs one spine and two setae), (d) length:width ratio of P1 enp-2 (2.2 vs 1.3), and (e) armature of P3–P4 exp-3 (distal inner seta present and short vs absent). In addition, females can be differentiated by the proportional segment lengths in the antennule (segment 1 longest in Po. megarostrum vs segment 2 longest and entire appendage more slender in Po. pyriformis ) and P5 morphology (L:maximum W ratio 2.2 and distal outer seta longest in Po. megarostrum vs 3.25 and inner distal seta longest in Po. pyriformis ). Males differ in the segmentation of P2–P3 endopods (3-segmented vs 2-segmented) and the number of elements on the P5 exopod (six vs five).