Latrunculia (Biannulata) procumbens Alvarez et al., 2002
publication ID |
https://doi.org/ 10.11646/zootaxa.1127.1.1 |
publication LSID |
lsid:zoobank.org:pub:E3B8BACE-1E5B-4E07-AB94-A4947F966483 |
persistent identifier |
https://treatment.plazi.org/id/038D1B08-1363-FF87-FED7-FD3A3271FD24 |
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Felipe |
scientific name |
Latrunculia (Biannulata) procumbens Alvarez et al., 2002 |
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Latrunculia (Biannulata) procumbens Alvarez et al., 2002 View in CoL
(Figs 6D, 7, 8H; Tables 2 & 3)
Latrunculia procumbens Alvarez et al., 2002 View in CoL , PG. 161, FIGS 3B, 5 View FIGURE 5
Holotype material. Not examined, NZOI H795 (97 TUT129 ) NIWA collection [ NIWA collectionstation and locality data details are outlined in Appendix 1, Alvarez et al., (2002)].
Additional Paratype material. Not examined, NZOI P1261 (97 TUT15 ), NZOI P1262 (97 TUT126 ) NIWA collection [ NIWA collectionstation and locality data details are outlined in Appendix 1, Alvarez et al., (2002)] .
Other material examined. MKB 723 (cross ref. Ts 11 and UAZA 6.3 ) Cape Brett , New Zealand, depth unknown . QM 310718 (cross ref. Q66C2025 R and Ts 119) labeled Latrunculia brevis identified by CNB, Cape Brett , Northland, New Zealand, 35º 11' 50"S; 174º 20'40"E, depth 12 m, AIMS/NCI collection GoogleMaps . QM 310735 (cross ref. Q66C2057A and Ts 120) labeled Latrunculia sp. identified by CNB, New Zealand, depth 15–20 m, AIMS/NCI collection .
Diagnosis. Thinly to thickly encrusting with cylindrical oscules at the apex, or as thin fistules and mammiform areolate porefields ( Fig. 8H). Colour in life is dark green; in preservative, dark brown. Styles are fusiform and slightly sinuous, 369(311–437) x 7 (4–9) m, n=20. Anisodiscorhabds (Fig. 6D) have an expanded manubrium and the median whorl is midway between manubrium and apical whorl. The subsidiary whorl is more or less winglike, slanted slightly upwards and situated directly below and almost fused with the apical whorl. There is also no basal whorl of spines present above the manubrium as characteristic for this subgenus. The whorls are notched along the rim and divided into segments, each segment possessing denticulate margins of 5 spines. The denticulate margins of the subsidiary and median whorls are microspined, and the apical whorl and manubrium are smooth, 29 (21–35) x 5 (2–7) m, n=20. The choanosomal skeleton is often vaguely reticulate, but where reticulation is visible an irregular polygonalmeshed reticulation of wispy tracts of smooth styles makes it up (see Fig. 5B View FIGURE 5 in Alvarez et al. 2002). There is no distinction between primary and secondary tracts. These tracts range in width from <100 m in thickness. Towards the surface the spicules tend to be vertically arranged and just below this triangular or oval meshes are visible. Interstitial megascleres and anisodiscorhabds scattered abundantly throughout choanosome. The surface of the ectosome is lined with an erect layer of single noninterlocking anisodiscorhabds. Beneath the discorhabds in the ectosome is a thick paratangentialtangential layer of densely interlocking megascleres, 100–300 m deep. The sponge is found on vertical walls, in serge and shaded areas at a depth between 2–20 m (after Alvarez et al. 2002).
Geographic distribution ( Fig. 7 View FIGURE 7 ). New Zealand
Remark. As explained by Alvarez et al. (2002), L. procumbens can clearly be differentiated from L. kaakaariki and L. duckworthi , only on genetic data, but not on the structure of the acanthodiscorhabd ( Table 2), although on average L. procumbens have thinner microscleres ( Table 3). However, this clearly does not the case between the three New Zealand species and structural differences are very apparent on the structure of the acanthodiscorhabds. For example, L. duckworthi have a very compact manubrium and apical whorl, whereas these structures are expanded in L. procumbens . The apical whorl of L. duckworthi is also not fused with the subsidiary whorl as in L. procumbens . Apart from this the medium and subsidiary whorls of the acanthodiscorhabd in L. duckworthi are microspined compared to being smooth as in L. procumbens .
Latrunculia procumbens also differs in gross morphology and colouration from L. duckworthi and L. kaakaariki in that it is thinly encrusting, is green/khaki in life, as appose to being thickly encrusting to massive and either green or chocolate brown in colour as observed in L. duckworthi and L. kaakaariki respectively. The species seems to be close to L. wellingtonensis based on the structure of the acanthodiscorhabd.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Latrunculia (Biannulata) procumbens Alvarez et al., 2002
Samaai, Toufiek, Gibbons, Mark J. & Kelly, Michelle 2006 |
Latrunculia procumbens
Alvarez 2002 |