Ceratopera cascadiensis Steenkiste & Leander, 2018, SP. NOV.
Notice bibliographique
Résumé
CERATOPERA CASCADIENSIS SP. NOV. (FIG. 3) Etymology: The species epithet refers to Cascadia, the Pacific Northwest of North America. Type locality: Clover Point, Victoria, British Columbia, Canada (48°24 ′ 12 ″ N, 123°21 ′ 03 ″ W), algae in rocky lower intertidal (16/03/2015). Type material: One whole mount which is designated as the holotype (SMNH Type-8919). Other material: Observations on a live animal. Diagnosis: Species of Ceratopera with a 158- μ m-long stylet. Stylet composed of a stylet proper that makes a 90° proximal turn, and a mantle consisting of a proximal girdle bearing two 100- μ m-long, plate-like tubes with pointed tips. Distal end of the stylet proper pointed. Plate-like tubes provided with a ridge of which at least one has a combed edge. Bursal appendage 91 μ m long, with broad base and spirally curled funnel that distally splits into two short insemination tubes. Description: Animal 1.2 mm long with eyes and some parenchymatous brownish coloration (Fig. 3A). General appearance much plumper than the more typical fusiform C. axi found at the same locality (Figs 3A, 4A). Pharynx slightly anterior to the midpoint of the body. Epidermis packed with oblong rhabdites. Rhabdite tracks present in the anterior body half. Internal organization identical to C. axi with paired testes posterior to the pharynx, paired seminal vesicles entering the prostate vesicle, an elongated bursa with a sclerotized bursal appendage, paired ovaries and vitellaria. The sclerotized parts of the male copulatory organ measure 158 μ m (non-axial: 117 μ m) and consist of (1) a 158- μ m-long stylet proper that is proximally curved over 90° and distally straight with a pointed tip; and (2) a mantle modified into a proximal girdle that modifies into two 100- μ m-long, plate-like tubes with pointed tips (Fig. 3B, C). The girdle connects to and surrounds the proximal curved part of the stylet. The distal tubes run adjacent to the stylet and bear a ridge of which at least one has a combed edge (arrow in Fig. 3B, C). The bursal appendage is typical of Ceratopera and consists of a broad, striated proximal base and a spirally curled, more sclerotized funnel that distally splits into two short insemination tubes (Fig. 3D, E). The spiral length of the bursal appendage measures 91 μ m. Discussion: This species closely resembles representatives of Ceratopera sensu Den Hartog because of the typical construction of the stylet with a mantle surrounding the stylet proximally and the funnel-shaped bursal appendage. Ceratopera sensu Den Hartog encompassed 11 recognized species, which are discussed in Den Hartog (1964), Ehlers & Ax (1974) and Karling (1986) (but see also the discussion on C. complicata sp. nov. and the general discussion). The mantle associated with the stylet is modified into two structures in only three species of this group: C. sellai (Steinböck, 1933) Den Hartog, 1964, C. levinseni Den Hartog, 1964 and C.reisingeri (Riedl, 1959) Den Hartog, 1964. In the first two species, these modifications consist of elongated plates (‘lamellae’ in Den Hartog, 1964) proximally originating on a girdle surrounding the stylet, while in the latter species a girdle is absent. The stylet of C. cascadiensis sp. nov. mostly resembles the one of C. sellai as one plate is also tubular and runs closely adjacent to the stylet. However, the other plate in C. sellai is curved and distally modified into a sheet (Den Hartog, 1964), thus differing from the situation in C. cascadiensis sp. nov. Ax (1995) reports on a Greenlandic specimen of Ceratopera he provisionally attributes to C. cfr. levinseni. The elongated stylet of the live specimen he observed (Ax, 1995: figs 14D, 16) shows a general resemblance to the stylet of C. cascadiensis sp. nov. Although Ax (1995) did not notice any division of the mantle into two ‘lamellae’, two elongated plates or tubes seem to be present (Ax, 1995: fig. 16B). Unfortunately, no further details on the morphology of the mantle or the bursal appendage of the Greenlandic specimen are available. As such, this individual remains without a formal species designation. Ceratopera cascadiensis sp. nov. further differs from all other species of Ceratopera sensu Den Hartog by the presence of a combed edge on at least one of its mantle tubes. In all other species the edges of the mantle plates or tubes are smooth. With four species of Ceratopera known from the Northeast Pacific Ocean (C. axi, C. pacifica comb. nov., C. ehlersi Karling, 1986, and C. pilifera), C. cascadiensis sp. nov. is the fifth species described from this region.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,002 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,003 | 0,002 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,001 | 0,002 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,007 | 0,005 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».