Acryptolaria abies ( Allman, 1877 ),

Peña Cantero, Alvaro L., Marques, Antonio C. & Migotto, Alvaro E., 2007, Revision of the genus Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae), Journal of Natural History 41 (5 - 8), pp. 229-291: 233-235

publication ID

http://doi.org/ 10.1080/00222930701228132

persistent identifier

http://treatment.plazi.org/id/AC456037-6016-6247-FE02-FE43891D6BE6

treatment provided by

Carolina

scientific name

Acryptolaria abies ( Allman, 1877 )
status

 

Acryptolaria abies ( Allman, 1877) 

( Figures 1View Figure 1, 15AView Figure 15, 17AView Figure 17; Table I)

Cryptolaria abies Allman 1877, p 20  , 21, Plate 13 Figures 1View Figure 1, 2View Figure 2.

Material examined

Lectotype: MCZ 9063View Materials, Atlantic Ocean, Gulf Stream Expedition, several fragments up to 20 mm long  . Paralectotype: MCZ 9077View Materials, Atlantic Ocean, Gulf Stream Expedition, four fragments up to 18 mm long and one incipient stem ca 5 mm high  . Other material: MCZ 45714View Materials, off Double-Headed Shot Key (23 ° 579300 S, 80 ° 299150 W), 315 fathoms (567 m), a vial with four fragments up to 9 mm included in the type material of Acryptolaria longitheca    .

Description

‘‘Hydrocaulus attaining a height of about two inches [50.8 mm], irregularly branched, with a pinnate disposition of the ultimate ramuli’’ ( Allman 1877, p 20). Presently, lectotype material composed of several fragments up to 20 mm in length. Most fragments belonging to the strongly polysiphonic basal part of stem. Stem hydrothecae barely visible. Stem straight, giving rise to lateral branches at right angles, probably following an alternate pattern. Branches straight.

Hydrothecae alternately arranged in approximately one plane. Hydrotheca almost cylindrical; diameter sharply decreasing at basal part and, sometimes, slightly from the middle to the distal part. Hydrotheca gently curved abcaulinarly; adcauline wall approximately two-thirds adnate to internode. Adcauline wall convex; abcauline wall practically straight at basal half, concave at distal half. Hydrothecal aperture circular, parallel to longitudinal axis of branch or slightly directed upwards or downwards. Sometimes adcauline wall longer than abcauline one and, consequently, hydrothecal aperture oblique. Rim even, sometimes with few short renovations.

Coppinia not observed.

Remarks

The material described by Allman (1877) is presently divided into two lots, both held in the Museum of Comparative Zoology at Harvard University and, therefore, should be considered as syntypes of the species. We chose the material MCZ 9063 as the lectotype and MCZ 9077 as paralectotype of A. abies  ( International Commission on Zoological Nomenclature 1999, Article 74).

Allman (1877, p 20) already noticed that ‘‘the hydrothecae of this species [ A. abies  ] are considerably smaller than those of either C. conferta  or C. longitheca  . They can be seen … to be of a very different shape from those of the two former species, being here of an elongated flask-shape, tumid below and gradually narrowing towards its orifice’’.

Allman (1877, p 20) also pointed out that ‘‘Here [ A. abies  ] also they [the hydrothecae] are plainly provided with a distinct floor, and in all respects resemble a typical sertularian hydrotheca’’, and figured (Plate 13 Figure 2View Figure 2) the hydrothecae completely closed at their base. Nevertheless, the examination of type material leaves no doubt that the hydrotheca is devoid of a floor or diaphragm, as shown in Figure 1View Figure 1. The sharp decrease in diameter of the hydrothecae at the hydrothecal base could account for Allman’s (1877) mistake.

In the examined type material of A. longitheca  ( MCZ 45714View Materials), there was a small vial with four fragments up to 9 mm long which clearly belong to A. abies  . In these fragments the branching is alternate in one plane and the angle between stem and branches is ca 45 °. The shape and size of the hydrotheca is in complete agreement with the type material of A. abies  .

Distribution

According to Allman (1877), the label belonging to the type material of A. abies  was effaced, it not being possible to ascertain the exact locality and depth from which the specimen came. The material of A. longitheca  here assigned to A. abies  was collected at a depth of 567 m off Double-Headed Shot Key (23 ° 579300 S, 80 ° 299150 W), Florida.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Lafoeidae

Genus

Acryptolaria

Loc

Acryptolaria abies ( Allman, 1877 )

Peña Cantero, Alvaro L., Marques, Antonio C. & Migotto, Alvaro E. 2007
2007
Loc

Cryptolaria abies

Allman 1877: 20
1877