Lourinia wellsi, Karaytuğ & Sak & Alper & Sönmez, 2021

Karaytuğ, Süphan, Sak, Serdar, Alper, Alp & Sönmez, Serdar, 2021, Resolving the Lourinia armata (Claus, 1866) complex with remarks on the monophyletic status of Louriniidae, Monard 1927 (Copepoda: Harpacticoida), Zootaxa 5051 (1), pp. 346-386 : 355-363

publication ID	https://doi.org/ 10.11646/zootaxa.5051.1.15
publication LSID	lsid:zoobank.org:pub:197BF058-FCD8-444B-8749-879FE0534EBD
DOI	https://doi.org/10.5281/zenodo.5563707
persistent identifier	https://treatment.plazi.org/id/BD3F091F-FFA1-482D-FF02-771BEF36FDCC
treatment provided by	Plazi
scientific name	Lourinia wellsi
status	sp. nov.

Treatment

Lourinia wellsi sp. nov.

( Figs. 6–11 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 )

Synonym. Lourinia armata ( Claus, 1866) sensu Alper et al. (2015) ; Karaytuğ & Koçak (2018).

Type locality. Turkey, Aydın province, intertidal zone of Dipburun Beach / Kuşadası (N37.6634167°, E27.0090556°); collected on 25 October 2012 GoogleMaps .

Type material. Holotype ♀ dissected on nine slides. Allotype ♂ collected on 25 November 2012, dissected on nine slides. Paratypes represented by six ♀♀ and three copepodids. The holotype and allotype are deposited in the NHM, London.

Additional material examined. All additional samples mentioned below were obtained from washings of the macroalgae which were collected from the localities. One ♀ in washings of Posidonia oceanica , collected at 1 m depth from a beach located at northwest of Seddülbahir Village / Eceabat / Çanakkale (40.051212°, 26.167424°); collected on 05 July 1995 . Three ♀♀ from Tınaztepe cove/ Urla / İzmir / Turkey (N38.4013056°, E26.4882778°); collected on 24 May 2012 GoogleMaps . Three ♀♀ and two ♂♂ from Çanak cove/ Foça / İzmir / Turkey (N38.6666111°, E26.7428333°); collected on 25 May 2012 GoogleMaps . One ♂ from Bademli beach/ Dikili / İzmir / Turkey (N39.0388333°, E26.8253611°), collected on 25 May 2012 GoogleMaps . Two ♀♀ from beach of Burcu holiday site/ Çeşme / İzmir / Turkey (N38.3472222°, E26.4505000°); collected on 16 June 2013 GoogleMaps . One ♀ from Tınaztepe cove/ Urla / İzmir / Turkey (N38.4013056°, E26.4882778°), collected on 16 June 2013 GoogleMaps . One ♂ from the sandy beach at İkiz Cove / Eceabat / Çanakkale / Turkey (N40.06317°, E26.17724°); collected on 28 September 2013 GoogleMaps . One ♀ from a beach located at west of Sazlıdere / Keşan / Edirne / Turkey (N40.64288°, E26.72029°); collected on 29 September 2013 GoogleMaps . One ♀ from beach of Kumlimanı holiday site/ Eceabat / Çanakkale / Turkey (N40.16248°, E26.24680°); collected on 29 September 2013 GoogleMaps . One ♀ from Kanlısırt Beach / Eceabat / Çanakkale / Turkey (N40.16248°, E26.24680°); collected on 23 February 2014 GoogleMaps .

Description of female. Body shape ( Fig. 6A–B View FIGURE 6 ) similar to that of L. aff. armata . Total body length: 1,094 μm (mean = 962 μm; n = 21); maximum width: 212 μm (mean = 215 μm; n = 21). Rostrum triangular, defined at base with two sensillae with serrate tip ( Fig. 6C View FIGURE 6 ). Dorsal surface of genital double-somite, third urosomite and anal somite ornamented with microspinules as figured. Spinular ornamentation of genital double-somite, third and fourth urosomites similar to L. aff. armata ( Figs. 6B View FIGURE 6 ; 11A View FIGURE 11 ). Anal somite with one pair of sensilla dorsally; anal operculum straight, margin ornamented with short setules.

Antennule ( Fig. 7A View FIGURE 7 ) 7-segmented. First segment ornamented with spinule rows as figured, with one seta. Second segment with nine setae. Third segment longest, with six setae. Fourth segment with one seta and with aesthetasc fused basally to seta arising from common pedestal. Fifth and sixth segments with one and two setae, respectively ( Fig. 7B View FIGURE 7 ). Distal segment with six setae and with apical acrothek consisting of an aesthetasc and two setae. Setal formula of antennule: 1–[1]; 2–[9]; 3–[6]; 4–[1+ (1 + ae)]; 5–[1]; 6–[2]; 7–[6 + acrothek].

Antenna ( Fig. 7C View FIGURE 7 ). Coxa rectangular, ornamented with spinule row as figured. Allobasis ornamented with spinule row as figured. Exopod 1-segmented, with two bipinnate setae apically. Endopod 1-segmented, ornamented with spinule rows as figured; protruding at outer corner apically; lateral armature consisting of two spines (distal one bipinnate), distal armature consisting of one long bipinnate spine and three naked spines (outer one fused basally to a small seta).

Mandible, maxillule, maxilla and maxilliped as in L. aff. armata .

P1 ( Fig. 8A View FIGURE 8 ). Spinular ornamentation of praecoxa, coxa and basis similar to L. aff. armata . Inner spine of basis extending at most to end of first endopodal segment. Exopod 3-segmented, inner margin of second segment ornamented with setules; first and second segments without inner armature; distal segment with one inner, one apical seta and two outer spines. Endopod 2-segmented, shorter than exopod; first segment with one inner, distally pectinate seta; distal segment with two inner setae (proximal one distally pectinate) and one apical spine.

P2–P4 ( Figs. 8B View FIGURE 8 ; 9A–D View FIGURE 9 ). Intercoxal sclerites, praecoxae, coxae and bases similar to L. aff. armata . Exopods 3-segmented, inner margin of second and third segments ornamented with setules; first segment without inner armature; second segment with one plumose (P2) ( Fig. 8B View FIGURE 8 ) or one bare (P3) ( Fig. 9A View FIGURE 9 ) or one long plumose (P4) ( Fig. 9B View FIGURE 9 ) inner seta; distal segment with one plumose inner seta, two apical setae and three outer spines. Endopods 2-segmented, shorter than exopods; first segment with one distally pectinate (P2) ( Fig. 8B View FIGURE 8 ) or one bipinnate (P3) ( Fig. 9C View FIGURE 9 ) or one long, distally unipinnate (P4) ( Fig. 9D View FIGURE 9 ) seta; second segment with three inner (two distally pectinate and one plumose), two apical setae (one naked and one plumose) and one outer spine (P2) ( Fig. 8B View FIGURE 8 ) or three inner setae (two plumose, one distally pectinate), two plumose apical setae and one outer spine (P3) ( Fig. 9C View FIGURE 9 ) or one distally pectinate inner seta; two plumose apical setae and one outer spine (P4) ( Fig. 9D View FIGURE 9 ).

Fifth pair of legs ( Figs. 7D View FIGURE 7 ; 11A View FIGURE 11 ) fused, baseoendopod well developed, outer basal seta naked. Endopodal lobe with six bipinnate elements; setae I–II spiniform, seta IV longest. Exopod distinct, ovoid, with five long bare setae.

Sixth pair of legs ( Fig. 11B View FIGURE 11 ) covered by P5, with one spiniform outer element, one seta and three small, apically serrate, inner elements.

Caudal rami ( Fig. 6D–F View FIGURE 6 ) about 1.6 times as long as broad, bearing six setae. Position of setae similar to L. aff. armata . Seta V naked. Spinules around ventral distal margin smaller than in L. aff. armata .

Description of male. Body ( Fig. 10A View FIGURE 10 ) cylindrical, tapering posteriorly. Total body length about 712 μm (mean = 880 μm, n = 5). Maximum width: 152 μm (mean = 206 μm; n = 5). Ventral posterior margin of third and fourth urosomites with continuous row, fifth urosomite with paired rows of spinules, spinules regular in size ( Fig. 11C View FIGURE 11 ). Sexual dimorphism in body size and spinular/microspinular ornamentation, antennule, P2–P3 endopods, and P5 and P6.

Antennule ( Fig. 10B View FIGURE 10 ) 9-segmented, subchirocer. First segment ornamented with spinule rows as figured, with a bare seta at inner distal corner. Second segment with nine setae. Third and fourth segments small ( Fig. 10C View FIGURE 10 ), with six and two setae, respectively. Fifth segment ( Fig. 10D View FIGURE 10 ) with aesthetasc fused basally to seta on common elongate pedestal. Sixth segment ( Fig. 10E View FIGURE 10 ) with seven elements (four naked setae and three pectinate setae with tube-like extension distally). Seventh segment naked. Eighth segment with one seta ( Fig. 10E View FIGURE 10 ). Distal segment ( Fig. 10F View FIGURE 10 ) with six setae and apical acrothek consisting of aesthetasc fused basally with two setae. Armature formula of antennule: 1–[1]; 2–[9]; 3–[6]; 4–[2]; 5–[1 + ae)]; 6–[7]; 7–[0]; 8–[1]; 9–[6 + acrothek].

P2 endopod ( Fig. 8C View FIGURE 8 ). Proximal inner seta of enp-2 semiplumose along distal half and length slightly exceeding that of outer terminal spine. Inner apical seta of enp-2 about three times as long as length of outer terminal spine.

P3 endopod ( Fig. 9E View FIGURE 9 ) 3-segmented. First segment with one bipinnate inner seta; second segment small, with one plumose inner seta and elongate apophysis forming harpoon-like tip. Length of apophysis about 4.2 times longer than distal segment. Distal segment longest, rectangular, with two plumose apical setae.

Setal formula of swimming legs:

Fifth pair of legs ( Fig. 11C View FIGURE 11 ) fused; baseoendopod and exopod forming common plate; lobes not prominent. Exopodal lobe with one long bare seta medially, one unipinnate inner seta and four bipinnate setae; endopodal lobe with one long and two short bipinnate setae. Comparison of relative length of exopodal setae as follows: III>I>IV>II>V>VI.

Sixth pair of legs ( Fig. 11D View FIGURE 11 ) asymmetrical; bearing three bare setae each, inner seta longest.

Etymology. The new species is named in honour of the late Prof. John Wells for his contribution to harpacticoid taxonomy.